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WT8045N24P1

型号：

WT8045N24P1

描述：

同步信号鉴别和节能检测的绿色显示器[ Synchronous Signal Discriminator and Power Saving Detector for Green Monitor ]

品牌：

ETC[ ETC ]

页数：

25 页

PDF大小：

446 K

下载PDF手册
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
May 4, 1995  
DESCRIPTION  
The WT8045 is a silicon monolithic circuit designed for synchronous signal processing and power  
saving detection of multi-sync display monitors, which can cope with many kinds of PC's and  
workstations.  
It can be applied to display monitors supporting standard IBM VGA, VESA super VGA and IBM  
8514/A video modes. It can also be used in other high-end display monitors supporting non-standard  
video modes with user-defined horizontal/vertical frequency ranges.  
The WT8045 incorporates many functional circuits, including horizontal/vertical frequency  
discrimination, display mode selection, and synchronous pulse polarity and power saving detection,  
into this single chip IC.  
WT8045 is more convenient for you to shrink the PC board size and to reduce the material and labor  
cost with fewer components.  
FEATURES  
·
·
Accepting two separated H&V synchronous signals with positive/ negative polarity.  
Support VESA VGA (640X480, 640X400, 640X350), VESA SVGA (800X600), European  
SVGA (800X600), VESA new SVGA (800X600), XGA (1024X768) and 1280x1024.  
·
·
·
·
Capable of processing horizontal frequency between 25KHZ to 80KHZ.  
Standard IBM video mode control outputs (1024X768, 640X480, 640X400, 640X350).  
Five non-standard horizontal frequency control outputs in predefined frequency range.  
Power saving mode - It can detect the conditions of monitor to decide which one will be selected  
as following: ON/STANDBY/SUSPEND/OFF mode.  
·
Fixed polarity outputs on both horizontal and vertical synchronous signals.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
1
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
·
Power supply voltage: DC 5 volts; but for those pins with open-drain structure, such like the  
mode select control output and frequency discrimination control output pins, can be connected to  
12 volts through pull-high resistor.  
APPLICATION  
·
Auto size control for Multi-Sync Display Monitors  
ORDERING INFORMATION  
Part No.  
Package  
Note  
WT8045N24P1  
WT8045N24P3  
WT8045N24P4  
WT8045N24P5  
WT8045N24P6  
WT8045N24P7  
WT8045N24P8  
WT8045N28P1  
WT8045N28P2  
WT8045N28P3  
WT8045N28P4  
WT8045N28P5  
WT8045N28P6  
WT8045N28P7  
WT8045N28P8  
WT8045N32  
P-DIP 24L  
P-DIP 24L  
P-DIP 24L  
P-DIP 24L  
P-DIP 24L  
P-DIP 24L  
P-DIP 24L  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 28L (skinny)  
P-DIP 32L  
V * 128  
Without Mute  
Without Mute  
V * 1  
With Mute  
Without Mute  
With Mute  
V * 128 Without Mute  
V * 128 Without Mute  
V * 1 Without Mute  
V * 128 With Mute  
V * 1 With Mute  
V * 1 Without Mute  
V * 128 With Mute  
V * 1 With Mute  
--  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
2
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
PIN CONFIGURATION  
WT8045N24P3  
WT8045N24P1  
24  
23  
22  
21  
20  
19  
18  
OSCin  
1
VDD  
24  
23  
22  
21  
20  
19  
18  
1
OSCin  
VDD  
OSCout  
1024x768(56.5K)  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
2
3
OSCout  
1024x768(56.5K)  
2
3
4
5
6
HSin  
VSin  
HSin  
VSin  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
4
5
6
7
8
H_out  
V_out  
F43.5K  
F36.2K  
F33K  
H_out  
V_out  
800x600(37.5K)  
800x600(35.2K)  
640x480  
F43.5K  
F36.2K  
F33K  
7
8
17  
16  
17  
16  
9
9
640x400  
640x400  
15  
14  
13  
15  
14  
13  
Vss  
QV128  
QVRC  
10  
11  
12  
10  
11  
12  
640x350  
QH  
640x350  
QH  
PM1  
QHRC  
QHRC  
PM3  
Vss  
WT8045N24P4  
WT8045N24P5  
24  
23  
22  
21  
20  
19  
18  
1
OSCin  
VDD  
24  
23  
22  
21  
20  
19  
18  
1
OSCin  
VDD  
OSCout  
1024x768 (I)  
800x600(37.5K)  
NC  
2
3
4
5
6
OSCout  
1024x768(56.5K)  
2
3
4
5
6
HSin  
VSin  
Hout  
Vout  
HSin  
VSin  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
800x600(35.2K)  
640x480(31.5K)  
640x400(31.5K)  
H_out  
V_out  
F36.2K  
F33K  
NC  
7
8
F43.5K  
F36.2K  
F33K  
7
8
640x480  
(37.5K/72Hz)  
17  
16  
17  
16  
640x350  
(31.5K/37.5K)  
9
9
640x400  
15  
14  
13  
15  
14  
13  
NC  
QV1  
NC  
10  
11  
12  
10  
11  
12  
640x350  
QH  
PM3  
PM2  
QVRC  
VSS  
PM1  
QHRC  
Vss  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
3
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
WT8045N24P6  
WT8045N24P7  
24  
23  
22  
21  
20  
19  
18  
24  
23  
22  
21  
20  
19  
18  
OSCin  
1
OSCin  
1
VDD  
VDD  
OSCout  
OSCout  
1024x768(56.5K)  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
1024x768(56.5K)  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
2
3
2
3
HSin  
VSin  
HSin  
VSin  
4
5
6
7
8
4
5
6
7
8
H_out  
V_out  
F43.5K  
F36.2K  
F33K  
H_out  
V_out  
F43.5K  
F36.2K  
F33K  
17  
16  
17  
16  
9
9
640x400  
640x400  
15  
14  
13  
15  
14  
13  
Vss  
Vss  
10  
11  
12  
10  
11  
12  
640x350  
QH  
640x350  
PM3  
Mute  
P52K  
QHRC  
PM2  
PM3  
PM1  
WT8045N32  
WT8045N24P8  
32  
31  
OSCin  
1
VDD  
24  
23  
22  
21  
20  
19  
18  
OSCin  
1
VDD  
OSCout  
1024x768(56.5K)  
2
3
4
5
6
OSCout  
1024x768(56.5K)  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
HSin  
VSin  
2
3
30  
29  
1024x768 (NI)  
1280x1024(64K)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
HSin  
VSin  
H_out  
V_out  
28  
27  
26  
4
5
6
7
8
H_out  
V_out  
F43.5K  
F36.2K  
F33K  
F43.5K  
F36.2K  
7
8
25  
24  
23  
F33K  
9
QV128  
QVRC  
10  
11  
12  
13  
14  
15  
16  
640x400  
17  
16  
22  
21  
640x350  
QH  
9
640x400  
Vss  
SELPIN  
QHRC  
PM3  
PM2  
PM1  
20  
19  
18  
15  
14  
13  
Vss  
10  
11  
12  
640x350  
PM3  
-QH  
P52K  
F52K  
F60K  
PM1+PM2  
Mute  
17  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
4
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
WT8045N28P1  
VDD  
1
OSCin  
28  
27  
26  
OSCout  
1024x768(56.5K)  
2
3
4
5
6
HSin  
VSin  
1024x768 (NI)  
25  
24  
23  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
H_out  
V_out  
F43.5K  
F36.2K  
7
8
22  
21  
F33K  
9
20  
19  
18  
640x400  
10  
11  
12  
13  
14  
QV128  
QVRC  
640x350  
QH  
17  
16  
15  
QHRC  
PM3  
Vss  
F52K  
PM1  
PM2  
WT8045N28P3  
VDD  
1
OSCin  
28  
OSCout  
1024x768(56.5K)  
27  
26  
25  
24  
23  
2
3
4
5
6
HSin  
VSin  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
H_out  
V_out  
800x600(37.5K)  
800x600(35.2K)  
640x480  
F43.5K  
F36.2K  
7
8
22  
21  
F33K  
9
20  
19  
18  
640x400  
QV1  
10  
11  
12  
13  
14  
640x350  
QH  
QVRC  
17  
16  
15  
QHRC  
PM3  
Vss  
F52K  
PM1  
PM2  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
5
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
WT8045N28P5  
WT8045N28P4  
VDD  
OSCin  
1
VDD  
OSCin  
1
28  
28  
OSCout  
1024x768(56.5K)  
OSCout  
1024x768(56.5K)  
27  
2
27  
2
HSin  
VSin  
1024x768 (NI)  
26  
3
HSin  
VSin  
1024x768 (NI)  
26  
25  
24  
23  
3
25  
24  
23  
4
5
6
4
5
6
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480  
H_out  
V_out  
H_out  
V_out  
F43.5K  
F36.2K  
F33K  
F43.5K  
F36.2K  
F33K  
7
8
22  
21  
7
8
22  
21  
9
9
20  
19  
18  
640x400  
20  
19  
18  
640x400  
QV1  
10  
11  
12  
13  
14  
10  
11  
12  
13  
14  
QV128  
QVRC  
640x350  
QH  
640x350  
QH  
QVRC  
17  
16  
15  
17  
16  
15  
QHRC  
PM3  
QHRC  
PM3  
Vss  
Vss  
F52K  
F52K  
PM1  
+PM2  
PM1  
+PM2  
Mute  
Mute  
Not e: The Hout and Vout pi n of N28P1, N28P3, N28P4 and N28P5 ar e negat i ve pul se.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
6
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
ABSOLUTE MAXIMUM RATINGS  
ITEM  
Digital Supply Voltage  
SYMBOL  
VALUE  
5.5  
UNIT  
V
V
DD  
V
V
V
(5)+0.3  
V
Horizontal Sync. Input Voltage  
Vertical Sync. Input Voltage  
Power Dissipation  
HS  
DD  
PP  
V
(5)+0.3  
V
VS  
DD  
PP  
P
300  
mW  
¢ J  
¢ J  
D
Operating Temperature Range  
Storage Temperature Range  
T
0¡ 7ã0  
OPT  
T
-40¡ 1ã25  
STG  
RECOMMENDED OPERATING CONDITIONS  
ITEM  
Digital Supply Voltage  
SYMBOL MIN.  
TYP. MAX. UNIT  
V
(5)  
4.5  
5
5.5  
V
DD  
Supply Current (Standby)  
I
13  
mA  
P
V
V
Synchronous Input Voltage Low  
Synchronous Input Voltage High  
0.8  
5.5  
IL  
PP  
V
2.4  
25  
4
V
IH  
PP  
F
Horizontal Synchronous Frequency  
Range  
Vertical Synchronous Frequency  
Range  
80  
(for N32)  
120  
KHz  
¡ Ð  
H
F
50  
Hz  
¡ Ð  
V
F
Crystal Clock Frequency  
3.5764  
3.58  
3.5836 MHz  
CLK  
Open Drain Pull High Voltage  
V
12  
V
OH  
R
Resistance of Monostable for Hsin  
Capacitance of Monostable for Hsin  
Resistance of Monostable for Vsin  
Capacitance of Monostable for Vsin  
10  
100  
¡ Ð  
500  
¡ Ð  
K£ [  
pF  
H
H
V
V
C
R
C
100  
100  
¡ Ð  
10  
K£ [  
pF  
¡ Ð  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
7
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
ELECTRICAL CHARACTERISTICS  
(V =5V, T  
=25°C, Crystal=3.58MHz)  
DD OPT  
ITEM  
SYMBOL  
F33K  
MIN.  
32.9  
TYP.  
¡ Ð  
MAX. UNIT  
33.1  
KHz  
Discrimination of H.  
Synchronous Frequency  
F36.2K  
F43.5K  
F52K  
36.1  
43.4  
51.9  
59.9  
36.3  
43.6  
52.1  
60.1  
0.4  
KHz  
KHz  
KHz  
KHz  
¡ Ð  
¡ Ð  
¡ Ð  
F60K  
Output Low (H-out, V-out),  
V
V
OL1  
PP  
when I  
= 4mA  
OL  
Output High (H-out, V-out),  
when I = -400£ gA  
V
V
2.4  
OH1  
PP  
OH  
Open Drain Output Low  
when I = 6mA  
V
V
0.4  
4
OL2  
PP  
OL  
Output Sink Current (H-out, V-out)  
when V = 0.4V  
I
mA  
£ Ag  
mA  
mA  
OL1  
OL1  
Output Drive Current (H-out, V-out) ¡ WI ¡ W  
400  
OH1  
when V  
OH1  
= 2.4V  
Open Drain Sink Current  
when V = 0.4V  
I
I
10  
40  
OL2  
OL2  
OL2  
Open Drain Sink Current  
when V = 5V  
OL2  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
8
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
MONO_STABLE DYNAMIC ELECTRICAL CHARACTERISTICS  
(Ta=25°C; Input t ,t =20ns, C =50PF)  
r f  
L
ITEM  
MIN.  
0.558  
0.0384  
¡ Ð  
TYP.  
¡ Ð  
¡ Ð  
100  
MAX.  
4
UNITS  
£ sg  
ms  
Input H_SYNC Pulse Width  
Input V_SYNC Pulse Width  
Output Pulse Transition Time  
Output Pulse Propagation Delay  
Output Pulse Width Adjust Range  
0.125  
200  
600  
90  
ns  
ns  
300  
¡ Ð  
10  
¡ Ð  
¢ M  
H_MONO_STB:  
31KHz¡ 3Ð7.5KHz  
31KHz¡ 4Ð8KHz  
31KHz¡ 5Ð7KHz  
31KHz¡ 6Ð4KHz  
26.66  
20.83  
17.54  
15.62  
£ sg  
£ sg  
£ sg  
£ sg  
V_MONO_STB:  
(50Hz¡ 1Ð20Hz)*128  
6.4KHz¡ 1Ð5.36KHz  
(50Hz¡ 8Ð0Hz)*128  
65.10  
97.66  
£ sg  
£ sg  
6.4KHz¡ 1Ð0.2KHz  
10  
ms  
(50Hz¡ 1Ð20Hz)*1  
Typical Pulse width Variation as a  
function of Temperature at 75¢ Jto  
24 ¢ J  
Typical Pulse Width Variation as a  
function of Supply Voltage at  
4.75V to 5.25V  
¡ Ð  
¡ Ð  
¡ Ð  
¡ 2Ó  
¡ 2Ó  
¢ M  
¡ Ð  
¢ M  
Output Low (Sink) Current  
1
6
mA  
V
V
¡ Ð  
0
Output Voltage Low-Level  
Output Voltage High-Level  
Output Jitter (Hout & Vout)  
0.05  
¡ Ð  
5
¡ Ð  
4.95  
ns  
Hin & Vin Rise time and Fall time = 200ns  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
9
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
10  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION INFORMATION  
Struncure  
Name  
OSCin  
Function  
of  
Terminal  
A clock generating circuit is built into the chip. So if a resonator is I  
connected to OSCin/OSCout, a clock signal can be obtained  
OSCout  
Hsin  
Refer to OSCin pin  
O
Input terminal of horizontal synchronous signal  
I, TTL  
compatible  
I, TTL  
Vsin  
Input terminal of vertical synchronous signal  
compatible  
H_OUT  
Output pin, fixed negative polarity of original H_SYNC signal with I, TTL  
same pulse width (but, positive for N28P2, N28P6,N28P7 and  
N28P8)  
compatible  
V_OUT  
Output pin, fixed negative polarity of original V_SYNC signal with O, TTL  
same pulse width (but, positive for N28P2, N28P6,N28P7 and  
N28P8)  
compatible  
F43.5k  
F36.2k  
F33k  
>43.5k then active low, <43.5k then high  
>36.2k then active low, <36.2k then high  
>33k then active low, <33k then high  
O, open drain  
O, open drain  
O, open drain  
QV  
Output pin, fixed positive polarity of vertical signal; pulse width O, open drain  
depend upon RV & CV.  
QVRC  
Vss  
Input pin, connected to Vdd through RV & to ground through CV I  
Ground  
SELPIN  
Input pin, to select which one of H_SYNC or V_SYNC appears on I,  
the output pin of QV; N.C. selects the V-SYNC on the output,  
grounding selects the H_SYNC.  
connection)  
(N.C.-no  
-QH  
Output pin, fixed negative polarity of horizontal signal; pulse width O, open drain  
depend upon RH & CH.  
F52k  
F60k  
PM1  
>52k then active low, <52k then high  
>60k then active low, < 60k then high  
Indicate in STAND-BY mode  
O, open drain  
O, open drain  
O, open drain  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
11  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Struncure  
Name  
PM2  
Function  
of  
Terminal  
Indicate in SUSPEND mode  
Indicate in OFF mode  
O, open drain  
O, open drain  
I
PM3  
QHRC  
QH  
Input pin, connected to Vdd through RH & to ground through CH.  
Output pin, fixed positive polarity of horizontal signal; pulse width O, open drain  
depend upon RH & CH  
O, open drain  
640¡ Ñ350  
Mode select control output, if IBM VGA 640¡ 3Ñ50 mode, or VESA  
VGA 640¡ 3Ñ50 mode. Then active "low", else open state output  
O, open drain  
O, open drain  
640¡ Ñ480  
640¡ Ñ400  
VESA VGA mode 640¡ 4Ñ80 (37.5k/72Hz)  
If IBM VGA 640¡ 4Ñ00 mode, or VESA VGA 640¡ 4Ñ00 mode then  
active "low" (640¡ 4Ñ00, 31.5k, for N24P4)  
O, open drain  
O, open drain  
640¡ Ñ480  
800¡ Ñ600  
If IBM VGA 640¡ 4Ñ80 mode, or VESA VGA 640¡ 4Ñ80 mode then  
active "low" (640¡ 4Ñ80, 31.5k, for N24P4)  
VESA super VGA mode  
(H_SYNC = 35.2k, V_SYNC = 56Hz)  
European super VGA mode  
O, open drain  
O, open drain  
O, open drain  
800¡ Ñ600  
800¡ Ñ600  
(H_SYNC = 37.5k, V_SYNC = 60Hz)  
VESA new super VGA mode  
(H_SYNC = 48k, V_SYNC = 72Hz)  
IBM 8512/A interlace mode  
1024¡ Ñ  
768(I)  
(H_SYNC = 35.5k, V_SYNC = 86Hz)  
O, open drain  
O, open drain  
O, open drain  
1280¡ Ñ  
1024  
1280¡ 1Ñ024 mode control output  
(H_SYNC = 64k, V_SYNC = 60Hz)  
IBM 8514/A non-interlace mode  
(H_SYNC = 48.5k, V_SYNC = 60Hz)  
1024¡ Ñ  
768(NI)  
1024¡ Ñ  
768(57k)  
Vdd  
XGA 1024¡ 7Ñ68 mode Hsync freq. 57kHz  
(H_SYNC = 56.5k, V_SYNC = 72Hz)  
5 Volts power supply  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
12  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION DESCRIPTION  
DPMS (Display Power Management Signaling) Detection  
As per DPMS proposal version 1.0P, revision 0.54P, WT8045 provides Monitor Power  
Management Detection Circuit for the convenience of monitor designers in designing power  
saving monitors, or the so called "Green Monitors". Please refer to the table 1 as below for  
power states defined in the DPMS.  
DPMS requires at least 5 seconds delay before transition from ON state to any power saving  
state, to avoid unintentionally entering a power saving state during display resolution changes  
and timing mode changes. And it can be done instantaneously, for the transition between any  
power saving state.  
Table 1 Display Power Management Summary  
Signals  
DPMS  
Power  
Savings  
Recovery  
Time  
State  
Compliance  
Requirement  
Mandatory  
Horizontal Vertical  
Video  
Active  
On  
Pulses  
Pulses  
None  
Not  
Applicable  
Short  
Longer  
Stand-by  
Suspend  
Off  
No Pulses  
Pulses  
No Pulses No Pulses Blanked  
Pulses  
No Pulses Blanked  
Blanked  
Optional  
Mandatory  
Mandatory  
Minimal  
Substantial  
Maximum  
System  
Dependent  
*
"No-Pulse" represents the frequency of Hsin or Vsin less than or equal to 10Hz, but  
"Pulses" represents that frequency of Hsin greater than or equal to 10KHz and Vsin  
greater than or equal to 40Hz  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
13  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
The way WT8045 implements VESA DPMS  
As shown on Table 2, WT8045 use PM1 to represent Stand-by State, PM2 as Suspend State and  
PM3 as OFF State. When H_SYNC / V_SYNC signals transition from ON State to any one of  
the three power saving states, WT8045 will delay 5.9 seconds to meet the VESA DPMS  
requirement: the minimum 5 seconds delay to avoid unintentionally entering a power saving  
state during display resolution and timing mode changes. If during this delay time period,  
H_SYN and V_SYN signals return to ON State, then all three power management pins (PM1,  
PM2 and PM3) will remain ON state. If power management state of H_SYNC and V_SYNC  
prolong for more than 5.9 seconds, then these three power management pins will change to the  
corresponding states. While changing from any power saving state back to ON State will take  
about 0.368 second for H_SYNC / VSYNC pulse checking. And transition between any power  
saving state will be done immediately.  
Table 2: The truth table of Power Saving Detector  
MODE  
Hsin  
Vsin  
PM1  
PM2  
PM3  
ON  
Pulses  
No Pulses  
Pulses  
No Pulses  
No Pulses  
Pulses  
Pulses  
No Pulses  
No Pulses  
No Pulses  
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
STAND_BY  
SUSPEND  
OFF  
OVERRIDE  
Manually PWR ON  
OVERRIDE mode:  
To initial override, both horizontal and vertical sync signals shall be in the no pulses condition  
when the display is maintained during the entire time override is required. As soon as pulses are  
detected on horizontal and vertical sync signal. The display shall enter DPMS operation.  
Three power management pins are open drain structure and active low. If you do not need all  
those three power saving states in your design. You can just short two or three pins of the pins  
PM1/PM2/PM3. for example, by shorting pin PM1 and pin PM2, you will have only two power  
saving states, that is OFF and Suspend states, so you have three states total, including ON State.  
Please refer to Application Circuit 2.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
14  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Mono_Stable Circuit  
WT8045 includes two sets of Mono_Stable Circuits, one uses H_SYNC as trigger signal, the  
other uses either H_SYNC or V_SYNC as trigger signal (this only can be done on 32 pin  
package, for 24 pin and 28 pin packages the trigger signal is fixed to H_SYNC); for N24p4  
package, there is no mono-stable circuit. Please refer to the figure as below:  
QH  
T
H- SYNC  
vcc  
Rx/ Cx QH-  
SELECT=OPEN SELECT=L  
QV  
SWI TCH  
T
Q
QH  
V- SYNC  
SELECT  
vcc  
Rx/ Cx  
Q-  
The Mono_Stable Circuit is triggered by positive edge, no matter H_SYNC or V_SYNC is used  
as trigger signal. Please refer to the timing chart as below:  
Tr i gger Pul se  
posi t i ve  
negat i ve  
Q
Q-  
The output of Mono_Stable Circuit is open drain structure, and can be pulled up to +12V  
maximum.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
15  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
In case of using output pulse of V_MONO_STABLE as voltage source, in order to prevent the  
problem of slow response time, causing from the low frequency on vertical synchronous signal,  
WT8045 internally increases the vertical signal frequency to 128 times the original frequency,  
that is from 50Hz - 120 Hz to 6.4KHz - 15.36KHz. Then WT8045 uses this increased frequency  
as the input signal of MONO_STABLE, so the leading edge of the signal of the increased  
frequency will trigger the MONO_STABLE circuit.  
An external resistor (Rx) and an external capacitor (Cx) control the timing and accuracy of the  
circuit. Adjustment of Rx and Cx provides a wide range of output pulse widths from the Q and  
Q-bar terminals. The delay time from trigger input to output transition is independent of Rx and  
Cx.  
The minimum value of external resistor Rx is 10k ohms. The typical value of external capacitor  
Cx is 100 pF. The time period (T) for this multi-vibrator can be calculated with the formula: T »  
1.1 Rx · Cx.  
H/V Frequency Divisions and Video Modes  
Figure 1 illustrates the typical frequency ranges of H and V sync signals for display monitors.  
The operating video modes are determined by the H and V frequencies, and occasionally, by  
their polarities. The typical video modes of display monitors include the IBM VGA, VESA VGA,  
European VGA/super VGA, VESA super VGA, IBM 8514/A, XGA, and 1280x 1024.  
WT8045 can determine 13 standard video modes for 32 pin package (refer to Table 3) according  
to H and V frequencies and polarities. These standard video modes include the IBM VGA,  
VESA VGA, VESA super VGA and IBM 8514/A. This provides the users with the capability to  
adjust the screen size for different modes.  
WT8045 pre-sets the discriminating points both on H and V frequencies. The discriminating  
points for H sync are 33KHz, 36.2KHz, 43.5KHz, 52KHz and 60KHz (for 32 pin). These  
discriminating points will be able to identify various video modes as shown in Fig. 1. WT8045  
also provides the flexibility for users to define these discriminating points through mask option.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
16  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
The tolerance for H sync frequency discrimination is¡ 0Ó.1KHz. For instance, the 33KHz  
discriminating point will be able to distinguish the H sync frequency that is either "less than or  
equal to" 32.9KHz, or "greater than or equal to" 33.1KHz. There is an ambiguous region  
between 32.9KHz and 33.1KHz.  
WT8045 has two discriminating points, 64Hz and 78Hz, for the V sync signal as shown in Fig.1.  
The tolerance is ¡ 0Ó.4Hz. The discrimination results of V sync frequency are used internally for  
mode selection.  
Base on the package consideration, IBM VGA mode and VESA VGA mode (both have same  
resolution: 640x480, 640x400, 640x350) are decoded on same open Drain structure output pins.  
In case of these whole six modes decoding is needed, the horizontal frequency discrimination pin  
F33k or F36.2k must take into consideration. The horizontal frequency of IBM VGA mode is  
31.5kHz, and VESA IBM VGA mode is 37.5kHz. Using F33k or F36.2k pin can clearly identify  
these two standard modes. The decoding circuit is attached on application section for reference.  
Graphic Standard  
IBM VGA  
Resolution  
640X350  
640X400  
640X480  
800X600  
1024X768  
640X350  
640X400  
640X480  
800X600  
800X600  
1024X768  
1024X768  
1280X1024  
Horizontal  
31.5kHz  
31.5kHz  
31.5kHz  
35.2kHz  
35.5kHz  
37.5kHz  
37.5kHz  
37.5kHz  
37.5kHz  
48.0kHz  
48.5kHz  
56.5kHz  
64.0kHz  
Vertical  
70Hz  
70Hz  
60Hz  
56Hz  
86Hz  
83Hz  
83Hz  
72Hz  
60Hz  
72Hz  
60Hz  
72Hz  
60Hz  
Polarities  
+,-  
-,+  
-.-  
VESA Super VGA  
IBM 8512/A Interlaced  
+,-  
-,+  
-,-  
VESA VGA  
European Super VGA  
VESA New Super VGA  
IBM 8514/A Non-Interlaced  
VESA New 1024X768  
Work Station 1280X1024  
Table 3: Graphic Standard and Frequencies  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
17  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Fv (Hz)  
640X350  
(+,-)  
83.86  
78  
1024X768  
640x400  
(-,+)  
800X600  
640X350  
(+,-)  
640x400  
(-,+)  
640X480  
(-,-)  
1024X768  
70.72  
64  
800X600  
1280X1024  
640X480  
(-,-)  
800X600 1024X768  
56.60  
48  
31.5  
38  
35  
56  
64  
Fh(KHz)  
0
52  
60  
36.2  
43.5  
33  
(58.5 for N28P2)  
Fi gur e 1: H/ V Fr equency Di vi si on and Vi deo Mode  
PI N  
640X480  
640X400  
640X350  
Mode  
I BM  
640X480  
640X400  
640X350  
640X480  
640X400  
640X350  
0
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
0
VGA  
VESA  
VGA  
Tabl e 4: I BM VGA/ VESA VGA Decodi ng Tabl e  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
18  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Horizontal Frequency Discriminator  
There are horizontal frequency discriminator pins on different type package: 33k, 36.2k (for  
N24P4 package); 33k, 36.2k, 43.5k (for 24 pin); 33k, 36.2k, 43.5k, 52k (for 28 pin); 33k, 36.2k,  
43.5k, 52k, 60k (for 32 pin); please refer to table 5 for the logical truth table of these pins. These  
frequency discriminator pins output can be used for C Capacitor Control directly as well as  
S
other application.  
Signa  
F33k  
F36k  
F43.5k  
F52k  
F60k  
l
Hsync  
Hs<33k  
36k>Hs>33k  
43.5k>Hs>36k  
52k>Hs>43.5k  
60k>Hs>52k  
1
0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
Table 5: Truth table of Frequency discriminator  
Mute function Timing Diagram  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
19  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION CIRCUIT I  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
20  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION CIRCUITII  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
21  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION CIRCUIT III  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
22  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
APPLICATION CIRCUIT IV  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
23  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
DIP OUTLINE DIMENSIONS  
A
B
C
D
E
F
G
N24  
N28  
1250  
1385  
542  
288  
152  
130  
100  
100  
130  
130  
650  
355  
600  
310  
SKINNY  
N32  
1650  
542  
154  
100  
130  
650  
600  
¡ ¯Dimension in mil  
¡ ¯1mm = 39.37 mil  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
24  
WT8045  
Synchronous  
Signal  
Discriminator  
and  
Power Saving Detector for Green Monitor  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
WT8045N28P6  
WT8045N28P2  
VDD  
VDD  
1
1
OSCin  
OSCin  
28  
28  
1024x768(56.5K)  
OSCout  
1024x768(56.5K)  
OSCout  
27  
26  
25  
24  
23  
27  
26  
25  
24  
23  
2
3
4
5
6
2
3
4
5
6
HSin  
VSin  
1024x768 (NI)  
HSin  
VSin  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
1024x768 (I)  
800x600(48K)  
H_out  
V_out  
H_out  
V_out  
800x600(37.5K)  
800x600(35.2K)  
640x480(31.5K)  
800x600(37.5K)  
800x600(35.2K)  
640x480(31.5K)  
F43.5K  
F36.2K  
F43.5K  
F36.2K  
7
8
7
8
22  
21  
22  
21  
640x400  
(31.5K/37.5K)  
640x400  
(31.5K/37.5K)  
F33K  
F33K  
9
9
20  
19  
18  
20  
19  
18  
QV1  
10  
11  
12  
13  
14  
10  
11  
12  
13  
14  
QV128  
QVRC  
640x480(37.5K)  
QH  
640x480(37.5K)  
QH  
QVRC  
17  
16  
15  
17  
16  
15  
QHRC  
PM3  
QHRC  
PM3  
Vss  
F52K  
PM1  
Vss  
F52K  
PM1  
PM2  
PM2  
WT8045N28P8  
WT8045N28P7  
VDD  
OSCin  
1
VDD  
OSCin  
1
28  
28  
OSCout  
1024x768(56.5K)  
OSCout  
1024x768(56.5K)  
27  
2
27  
2
HSin  
VSin  
1024x768 (NI)  
26  
3
HSin  
VSin  
1024x768 (NI)  
26  
25  
24  
23  
3
25  
24  
23  
4
5
6
4
5
6
1024x768 (I)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
H_out  
V_out  
H_out  
V_out  
800x600(48K)  
800x600(37.5K)  
800x600(35.2K)  
640x480(31.5K)  
F43.5K  
F36.2K  
F33K  
F43.5K  
F36.2K  
F33K  
7
8
22  
21  
7
8
22  
21  
800x600(35.2K)  
640x480(31.5K)  
640x400  
(31.5K/37.5K)  
640x400  
(31.5K/37.5K)  
9
9
20  
19  
18  
20  
19  
18  
QV1  
10  
11  
12  
13  
14  
10  
11  
12  
13  
14  
QV128  
QVRC  
640x480(37.5K)  
QH  
640x480(37.5K)  
QH  
QVRC  
17  
16  
15  
17  
16  
15  
QHRC  
PM3  
QHRC  
PM3  
Vss  
Vss  
F52K  
F52K  
PM1  
+PM2  
PM1  
+PM2  
Mute  
Mute  
Not e: The Hout and Vout pi n of N28P2, N28P6, N28P7 and N28P8 ar e posi t i ve pul se.  
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾  
Weltrend Semiconductor, Inc.  
2F., No. 24, Industry E. 9th Rd.  
Science-Based Industrial Park  
Hsin-Chu, Taiwan, R.O.C.  
Tel: 886-35-780241  
Fax: 886-35-770419  
25  
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