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WT8043N24

型号：

WT8043N24

描述：

同步信号鉴别的多同步显示器显示器[ Synchronous Signal discriminator for Multi-Sync Display Monitor ]

品牌：

ETC[ ETC ]

页数：

20 页

PDF大小：

86 K

下载PDF手册
WT8043  
Synchronous Signal discriminator  
for Multi-Sync Display Monitor  
Jan. 30, 1996  
Description  
The WT8043 is a silicon monolithic circuit designed for synchronous signal  
processing of multi-sync display monitors capable of coping 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.  
WT8043 incorporates many functional circuits, horizontal/vertical frequency  
discrimination, display mode selection, and synchronous pulse polarity detection, into  
a single chip. Therefore, by using WT8043, monitor makers can shrink the PC board  
size, reduce the material cost with fewer components, and reduce labor cost as well.  
Features  
·
·
Accepting separate H&V Synchronous signals with any polarities  
Support VESA VGA (640x480, 640x400, 640x350), VESA SVGA (800x600),  
European SVGA (800x600), VESA new SVGA (800x600), XGA (1024x768)  
and 1280x1024.  
·
Also including NEC (24K) mode, 3 VESA New 75Hz timing modes and Apple  
MAC II (35k) mode.  
·
·
·
Capable of processing horizontal frequency from 25KHz to 80KHz  
Capable of processing vertical frequency from 50Hz to 120Hz  
Standard IBM video mode control outputs (1024x768, 640x480, 640x400,  
640x350)  
·
Six non-standard horizontal frequency control outputs with predefined frequency  
range. (users can define their own horizontal frequency range)  
·
·
Fixed polarity horizontal and vertical synchronous signals output  
Power supply voltage: 5V, but mode select control output and frequency  
discrimination control output, these open collector outputs can be combined with  
pull high resistor, pull up to 12V.  
Application  
·
Auto size control for Multi-Sync Display Monitors  
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
WT8043  
Ordering Information  
WT8043N16 WT8043N20P1 WT8043N20P4 WT8043N20P7 WT8043N20P8 WT8043N24  
P-DIP 24L  
Part No.  
Package P-DIP 16L  
P-DIP 20L  
P-DIP 20L  
P-DIP 20L  
P-DIP 20L  
(skinny type)  
Pin Configuration  
WT8043N20P8  
WT8043N20P1  
1
20  
19  
OSCin  
OSCout  
HSin  
1
20  
VDD  
OSCin  
OSCout  
HSin  
VDD  
1024x768(60K,75)  
1024x768(57K)  
19  
18  
2
3
4
5
6
2
3
1024x768(57K)  
1024x768(I)  
800x600(48K)  
800x600(46.8K,75)  
800x600(37.5K)  
640x480  
18  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35K)  
640x480  
VSin  
VSin  
17  
16  
15  
17  
16  
4
H_out  
V_out  
F45K  
H_out  
V_out  
F52K  
5
6
15  
14  
13  
12  
11  
14  
13  
12  
11  
7
8
7
F36K  
F45K  
8
Vss  
9
640x400  
F36K  
9
640x400  
F33K  
10  
640x350  
Vss  
10  
640x350  
WT8043N16  
WT8043N20P4  
1
16  
OSCin  
OSCout  
HSin  
VDD  
1
OSCin  
OSCout  
HSin  
20  
VDD  
15  
14  
1024x768 (I)  
800x600(37.5K)  
800x600(35K)  
640x480  
2
3
4
5
6
1024x768(57K)  
19  
2
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35K)  
640x480  
18  
3
4
5
6
VSin  
13  
12  
11  
10  
9
VSin  
H_out  
V_out  
F36K  
17  
16  
15  
H_out  
V_out  
F45K  
640x400  
7
8
640x350  
F33K  
14  
13  
12  
11  
Vss  
7
8
F36K  
Vss  
9
640x400  
F33K  
10  
640x350  
WT8043N20P7  
1
OSCin  
OSCout  
HSin  
20  
VDD  
1024x768(57K)  
19  
18  
2
3
4
5
6
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35K)  
640x480  
VSin  
17  
16  
H_out  
V_out  
15  
F52K  
F45K  
F36K  
Vss  
14  
13  
12  
11  
7
8
9
640x400  
NEC  
10  
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
WT8043  
WT8043N24  
24  
1
OSCin  
OSCout  
HSin  
VDD  
23  
22  
21  
20  
19  
18  
F72K  
2
3
4
5
6
1024x768(57K)  
VSin  
1024x768 (NI)  
1024x768 (I)  
800x600(48K)  
800x600(37.5K)  
800x600(35K)  
640x480  
H_out  
1280x1024  
(64k)  
V_out  
F60K  
F52K  
F45K  
F36K  
Vss  
7
8
9
17  
16  
15  
14  
13  
10  
11  
12  
640x400  
640x350  
F33K  
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
WT8043  
Absolute Maximum Ratings  
Item  
Symbol  
Value  
5.5  
Unit  
V
Digital Supply Voltage  
V
DD  
V
V
V
V
(5)+0.3  
Horizontal Sync. Input Voltage  
Vertical Sync. Input Voltage  
Power Dissipation  
V
V
HS  
VS  
DD  
(5)+0.3  
DD  
P
300  
0~70  
mW  
°C  
°C  
D
T
Operating Temperature Range  
Storage Temperature Range  
OPT  
STG  
T
-40~125  
Recommended Operating Conditions  
Item  
Symbol  
(5)  
Min.  
4.5  
Typ.  
5
Max.  
Unit  
V
Digital Supply Voltage  
V
5.5  
DD  
Supply Current (Oscillator on)  
I
mA  
V
P
Synchronous Input Voltage  
Low  
V
0.8  
5.0  
80  
IL  
Synchronous Input Voltage  
High  
V
2.4  
25  
50  
4
-
V
IH  
Horizontal Synchronous  
Frequency Range  
F
F
KHz  
Hz  
H
Vertical Synchronous  
Frequency Range  
-
120  
V
F
Crystal Clock Frequency  
3.5764 3.58 3.5836 MHz  
12  
CLK  
Open Drain Pull High Voltage  
V
8
V
OH  
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
WT8043  
Electrical Characteristics  
(V =5V, T  
=25°C, Crystal=3.58MHz)  
OPT  
DD  
Item  
Symbol  
F33K  
F36.2K 36.15  
F45K  
F52K  
F62K  
F72K  
Min.  
32.95  
Typ.  
Max.  
Unit  
33.05 KHz  
36.25 KHz  
45.05 KHz  
52.05 KHz  
62.05 KHz  
72.05 KHz  
-
-
-
-
-
-
Discrimintaion of H.  
Synchronous Frequency  
44.95  
51.95  
61.95  
71.95  
Output Low (H-out, V-out)  
V
0.4  
V
OL1  
When I = 4mA  
OL  
Output High (H-out, V-out)  
V
2.4  
V
OH1  
When I = -400mA  
OH  
Open Collector Output Low  
V
0.4  
4
V
OL2  
OL1  
When I = 6mA  
OL  
Output Sink Current (H-out,  
I
mA  
mA  
mA  
V-out) When V  
= 0.4V  
OL1  
Output Drive Current (H-out, ¡ ýI  
¡ ý  
400  
6
OH1  
V-out) When V  
= 2.4V  
OH1  
Open Drain Sink Current  
When V = 0.4V  
I
OL2  
OL2  
Input H_SYNC Pulse Width  
Input V_SYNC Pulse Width  
W
W
0.56  
0.56  
4
mS  
mS  
nS  
H_SYNC  
833  
60  
V_SYNC  
T
H_SYNC, Output Pulse delay,  
respect to Hsin  
DHS  
T
V_SYNC, Output Pulse delay,  
respect to Vsin  
Upper Trigger Input Point  
(H_IN, V_IN)  
60  
nS  
V
VHS  
V
2.0  
UTP  
V
Lower Trigger Input Point  
(H_IN, V_IN)  
0.8  
V
LTP  
V
Noise Margin (H_IN, V_IN)  
1.75  
V
NM  
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
WT8043  
Application Information  
Structure  
of  
Name  
Function  
Terminal  
OSCin  
A clock generating circuit is built into the chip. So if  
a resonator is connected to OSCin / OSCout, a clock  
signal can be obtained  
I
OSCout  
HSin  
Referent to OSCin pin  
Input terminal of horizontal synchronous Signal  
I, TTL  
Compatible  
VSin  
Input terminal of vertical synchronous Signal  
I, TTL  
Compatible  
H_out  
Output pin, active low, fixed polarity of original  
H_sync signal w/ same pulse width  
O, TTL  
Compatible  
1280 x 1024 1280x1024 mode control output  
O,  
open drain  
V_OUT  
F60K  
F52K  
F45K  
F36K  
Output pin, active low, fixed polarity of original  
V_sync signal w/ same pulse width  
O, TTL  
Compatible  
H, frequency input 60k discrimination > 60k then  
active low, < 60k then high  
O,  
open drain  
O,  
open drain  
O,  
> 52k then active low, < 52k then high  
> 45k then active low, < 45k then high  
> 36k then active low, < 36k then high  
open drain  
O,  
open drain  
Vss  
Ground  
F33K  
> 33k then active low, < 33k then high  
O,  
open drain  
O,  
640 x 350  
Mode seclect control output, if IBM VGA 640x350  
mode, or VESA VGA 640x350 mode, then active  
low, else high state output  
open drain  
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
WT8043  
(Contd.)  
Structure  
of  
Terminal  
O,  
open drain  
O,  
open drain  
O,  
open drain  
O,  
open drain  
O,  
open drain  
O,  
open drain  
O,  
Name  
NEC  
Function  
NEC 640 x 400, 24.8kHz/ 56.4Hz timing mode  
640 x 400  
640 x 480  
800 x 600  
800 x 600  
If IBM VGA 640 x 400 mode, or VESA VGA 640 x  
400 mode then active "low"  
If IBM VGA 640 x 480 mode, or VESA VGA 640 x  
480 mode then active "low"  
VESA super VGA mode Hsync freq. 35kHz  
European super VGA mode Hsync freq. 37.5kHz  
VESA new 75Hz Timing mode  
800 x 600  
(46.8k,75)  
800 x 600  
VESA new super VGA mode Hsync freq. 48kHz  
IBM 8514/A interlace mode  
open drain  
O,  
1024x768 (I)  
open drain  
O,  
1024x768  
(NI)  
IBM 8514/A non-interlace mode  
open drain  
O,  
1024x768  
(57k)  
XGA 1024x768 mode Hsync freq. 57kHz  
VESA new 75Hz Timing mode  
open drain  
O,  
1024x768  
(60k, 75)  
F72K  
open drain  
O,  
Hysnc freq. discrimination control output if > 72 kHz  
then active low, else high  
open drain  
VDD  
5 Volts power supply  
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
WT8043  
Time Chart  
·
Hi n - Hout  
WH-SYNC  
IN_H +  
-
IN_H  
H_OUT  
T dhs  
·
Vi n - Vout  
WV-SYNC  
IN_V +  
-
IN_V  
V_OUT  
T dvs  
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
WT8043  
Structure of Terminal  
Type 1  
PAD  
Open Drain NMOS can  
pull up by external resistor,  
no connector must be pull  
down or floating.  
Type 2  
VDD  
PAD  
Type 3  
VDD  
PAD  
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
WT8043  
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
WT8043  
Block Diagram I  
Figure 1-1 WT8043N20P1 Functional Block Diagram  
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  
WT8043  
Block Diagram II  
Figure 1-2 WT8043N24 Functional Block Diagram  
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  
WT8043  
Appication Description  
General Description  
Figure 1-1 and 1-2 is a simplified functional block diagram of the WT8043. It  
includes the following functional blocks: sync pulse polarity detector; horizontal  
and vertical frequency discriminator, mode selector.  
The Sync pulse polarity detector accepts separete H and V sync signals with any  
polarities. It determines their polarities and sends the polarity information to the  
mode selector for video mode selection. It alos generates -H and -V signals in spite  
of their input polarities.  
The H and V frequency discriminator determines the frequency range of H and V  
sync signals. The mode selector determines which operating video mode it should  
be, according to the frequency range and polarity of H and V sync signals. The  
operating video modes include the standard IBM VGA (640x350, 640x400,  
640x480), super VGA (800x600) and IBM8514/A (Inerlaced, Non-interlaced),  
VESA VGA & SVGA mode, VESA new SVGA mode, XGA (1024x768), and  
1280x1024 mode, also including NEC 24kHz and 3 VESA New 75Hz timing  
modes.  
The mode selector also generates output signals that represent the frequency range  
of H. sync signal. The H sync signal is divided into 6 frequency ranges (3 ranges  
for WT8043N20) according to Fig. 2, WT8043 has preset the discriminating points  
between frequency ranges. However, it also offers the flexibility for providing  
user-defined discriminating points for non-standard video modes.  
The digital noise filter is used for rejecting noise on the incoming horizontal and  
vertical synchronous signals. The input section uses two techniques to improve  
noise rejec-tion. So the low level noise and the large short duration noise spikes  
will be rejected. Horizontal synchronous pulse width under 0.56 ms and vertical  
synchronous pulse width under 0.56 ms will be considered as noise.  
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  
WT8043  
H/V Frequency Divisions and Video Modes  
Figure 2 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 NEC 24k mode, IBM VGA, VESA VGA, European  
VGA/Super VGA, Apple MAC II, VESA Super VGA, IBM 8514/A,3 VESA New  
75Hz modes, XGA, and 1280x 1024.  
WT8043 can determine 18 standard video modes (as shown in Table 1) according  
to H and V frequencies and polari-ties. 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.  
WT8043 pre-sets the discriminating points both on H and V frequencies. The  
discriminating points for H sync are 33KHz, 36.2KHz, 45KHz, 52KHz, 62KHz  
and 72KHz. These discriminating points will be able to identify various video  
modes as shown in Fig. 2. WT8043 also provides the flexibility for users to define  
these discriminating points through mask option.  
The tolerance for H sync frequency discrimination is 0.05KHz. For instance, the  
33KHz discriminating point will be able to distinguish the H sync frequency that is  
either "less than or euqal to" 32.95KHz, or "greater than or equal to" 33.05KHz.  
There is an ambiguous region between 32.95KHz and 33.05KHz.  
WT8043 has three discriminating points, 64Hz, 73.5Hz and 78Hz, for the V sync  
signal as shown in Fig.2. The tolerance is 0.01Hz. 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 (e.g. pin 14 to pin 16 for N20P1 pin type package). In  
case of these whole 6 modes decoding is needed, the horizontal frequency  
discrimination pin F33k or F36k must take into consideration. The horizontal  
frequency of IBM VGA mode is 31.4kHz, and VESA IBM VGA mode is 37.5kHz.  
Using F33k or F36k pin can clearly identify these two standard modes. The  
decoding circuit is attached on application section for reference.  
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  
WT8043  
Table 1: Graphaic Standard and Frequencies  
Graphic Standard Resolution Horizontal Vertical Polarities  
¡ I  
NEC Timing  
640 x 400  
640 x 350  
640 x 400  
640 x 480  
640 x 480  
640 x 480  
800 x 600  
1024 x 768  
640 x 350  
640 x 400  
640 x 480  
640 x 480  
800 x 600  
800 x 600  
800 x 600  
24.8KHz 56.4Hz  
-,-  
+,-  
-,+  
-,-  
31.5KHz  
31.5KHz  
31.5KHz  
35.0KHz  
38.6KHz  
35.2KHz  
35.5KHz  
37.5KHz  
37.5KHz  
37.5KHz  
37.5KHz  
37.5KHz  
46.8KHz  
48.0KHz  
48.5KHz  
56.5KHz  
60.0KHz  
70Hz  
70Hz  
60Hz  
67Hz  
72Hz  
56Hz  
86Hz  
83Hz  
83Hz  
72Hz  
75Hz  
60Hz  
75Hz  
72Hz  
60Hz  
72Hz  
75Hz  
60Hz  
IBM VGA  
Mac II  
New 72Hz  
-,+  
VESA Super VGA  
IBM 8514/A interlaced  
+,-  
-,+  
-,-  
VESA VGA  
VESA New 75Hz Timing  
European Super VGA  
-,-  
VESA New 75Hz Timing  
VESA New Super VGA  
IBM 8514/A Non-interlaced 1024 x 768  
VESA New 1024 x 768 1024 x 768  
VESA New 75Hz Timing 1024 x 768  
Work Station 1280 x1024 1280 x 1024 64.0KHz  
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  
WT8043  
Figure 2: H/V Frequency Division and Video Mode  
Fv (Hz)  
78  
1024X768  
(35k, 87)  
640X350  
(37k, 84)  
(+,-)  
640X400  
(37k, 84)  
(-,+)  
832X624  
(50k, 70)  
1024X768  
(60k, 75)  
640X480  
(37k, 75)  
(-,-)  
800X600  
(47k, 75)  
73.5  
640X350  
(32k, 70)  
(+,-)  
800X600  
(48k, 72)  
1024X768  
(56.5k, 72)  
640X480  
(35k, 67)  
MAC II  
640X480  
(37k, 73)  
(-,-)  
640X400  
(32k, 70)  
(-,+)  
640X480  
(38.6k, 72)  
(-,+)  
64  
30  
640X480  
(32k, 60)  
(-,-)  
640X400  
(24k, 56)  
800X600  
(35k, 56)  
800X600  
(38k, 60)  
1280X1024  
(64k, 60)  
1024X768  
(48k, 60)  
Fh(KHz)  
36.2  
52  
62  
28  
33  
11  
45  
Table 2: IBM VGA/ VESA VGA Decoding Table  
PIN  
640 x 480  
640 x 400  
640 x 350  
Mode  
640 x 480  
640 x 400  
640 x 350  
640 x 480  
640 x 400  
640 x 350  
0
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
0
IBM VGA  
VESA VGA  
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  
WT8043  
Horizontal Frequency Discriminator  
There are 3 horizontal frequency discriminator pins on 20 pin type package:  
36.2kHz, 45kHz, 52kHz (for N20P1), 33kHz, 36.2kHz, 45kHz (for N20P4); 2  
frequency discriminator pins on 16 pin type package: 33kHz, 36.2kHz and 6  
frequency discriminator pins on 24 pin type package: 33kHz, 36.2kHz, 45kHz,  
52kHz, 62kHz and 72kHz. Please refer to table 3 for the logical truth table of  
these pins. These frequency discriminator pins can pull up to +12V through a  
resistor, sink current to the open drain structure must keep under 6mA (ref. P4  
Electrical Characteristics). These frequency discriminator pins output can be used  
for CS Capacitor Control directly as well as other application.  
Table 3: Truth table of Frequency discriminator  
Signal  
F33K F36.2K F45K F52K F62K F72K  
Hsync  
Hs < 33k  
1
0
0
0
0
0
0
1
1
0
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
1
1
1
1
0
0
1
1
1
1
1
1
0
36.2k > Hs > 33k  
45k > Hs > 36.2k  
52k > Hs > 45k  
62k > Hs > 52k  
72k > Hs > 62k  
Hs > 72k  
SYNC Output State Description  
Both H_out / V_out duplicate Hsin/Vsin in the same frequency and pulse width,  
but are fixed at negative polarity. And H_out/ V_out have their own cut-off  
frequency: 15kHz for H_Sync and 30Hz for V_Sync. While the frequency of input  
signal is less than the cut-off frequency, the output will keep in low state. Please  
refer to the Table 4.  
Table 4:  
Hsin  
Vsin  
H_out  
V_out  
>15kHz  
>15kHz  
<15kHz  
<15kHz  
>30Hz Negative polarity Hsin Negative polarity Vsin  
<30Hz Negative polarity Hsin Low state  
>30Hz Low state  
<30Hz Low state  
Negative polarity Vsin  
Low state  
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  
WT8043  
Application Circuit I  
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  
WT8043  
Application Cirucit II  
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  
WT8043  
Physical Dimension  
A
B
C
D
E
F
G
16L  
20L  
754  
1024  
250  
250  
260  
130  
130  
130  
100  
100  
100  
130  
130  
130  
355  
355  
355  
300  
300  
300  
24L skinny 1250  
* Dimension in mil  
* 1mm = 39.37 mil  
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  
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