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IZ1225M

型号：

IZ1225M

描述：

带触摸的语气和标点符号功能基本功能的8位LCD计算器[ BASIC FUNCTION 8-DIGITS LCD CALCULATOR WITH TOUCH TONE AND PUNCTUATION FUNCTION ]

品牌：

INTEGRAL[ INTEGRAL CORP. ]

页数：

8 页

PDF大小：

116 K

下载PDF手册
IZ1225M  
BASIC FUNCTION 8-DIGITS LCD CALCULATOR WITH TOUCH  
TONE AND PUNCTUATION FUNCTION  
The IZ1225M is a single chip CMOS LSI with 8-digit arithmetic operation, single  
memory, extraction-of-square-root, percentage calculation and auto power off and  
punctuation and touch tone function, designed for FEM LCD operation with a 1.5V power  
supply.  
FUNCTIONS  
FEATURES  
• Four standard functions (+, -, ×, ÷ )  
• Auto constant calculations (constant:  
multiplicand, divisor,  
• Single chip CMOS construction  
• Floating decimal point  
• LCD direct drive  
addend and subtrahend)  
• Overflow indication: “E”  
• Accumulating memory: M+, M-,  
• Square and reciprocal calculations  
• Mark-up and mark-down calculations  
• Extraction of square root  
RM, CM, RM/CM  
• Percentage calculations  
• Chain multiplication and division  
• Power calculations  
• Rough estimate calculations  
• Touch tone function  
• 48 QFP and bare chip available  
• Mirror type  
• Punctuation comma display  
• Clear key: ON/C, ON/CE, CE  
ABSOLUTE MAXIMUM RATINGS (Ta = 25oC)  
Symbol  
Value  
Unit  
Note  
Characteristic  
VGG  
- 0.3 ~ + 3.5  
- 0.3 ~ VGG + 0.3  
2.5 ~ 3.5  
V
V
1
Terminal Voltage  
VIN  
Supply Voltage  
VGG  
TOPR  
Tstg  
V
Operating Temperature  
Storage Temperature  
0 ~ + 50  
oC  
oC  
- 55 ~ + 125  
Note: 1. Maximum voltage on any pin with respect to the GND  
1
IZ1225M  
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VGG = 3.0V, unless otherwise specified)  
Characteristic  
Input Voltage 1 (K2 ~ K6, TI,  
S2)  
Symbol  
VIH1  
Test Condition  
Min  
VGG - 0.4  
Typ  
Max  
Unit  
V
VIL1  
0.4  
VIH2  
VGG - 0.4  
Input Voltage 2 (S1)  
V
VIL2  
0.2  
IIH1  
IIL1  
IIH2  
IIL2  
IIH3  
IIL3  
IIH4  
IIL4  
VIN = VGG  
VIN = 0V  
VIN = VGG  
VIN = 0V  
1
10  
1
1
1
15  
40  
1
Input Current 1 (K2 ~ K6, TI)  
Input Current 2 (S2)  
A
A
A
A
5.5  
VIN = VGG  
VIN = 0V  
VIN = VGG  
VIN = 0V  
S2=GN  
Input Current 3 (S1)  
D
5
20  
10  
30  
S2 =  
VGG  
Input Current 4 (S1)  
Output Voltage 1 (P1, P2,  
A2~A5)  
VOH1  
without load  
VGG - 0.15  
V
VOL1  
VOA  
VOB  
0.15  
1.70  
0.20  
I
OUT = 15µA  
Output Voltage 2 (H1 ~ H3,  
a1 ~ a9, b1 ~ b8, c1 ~  
c8)  
without load  
without load  
2.80  
1.30  
2.95  
1.50  
V
VOC  
Fd  
without load  
VGG = 1.5V while  
display is on,  
VGG = 1.5V,  
VOL = 0.5V, TI =3V  
0
Display Frequency  
Touch Tone (PO)  
Output Drive Current  
50  
3
75  
Hz  
mA  
IOL  
VGG = 1.5V,  
IOH  
-3  
VOL = 0.5V, TI =3V  
Display off, VGG = 3V  
VGG = 1.5V while  
display is on,  
IOFF (1)  
Idis (2)  
0.1  
30  
Dissipation  
20  
A
NOTE: 1) Measured by the next test circuit after power supply automatically turns off.  
2) Measured by the next test circuit while “0” is being displayed after auto clear operation  
and while key is not being depressed.  
OUTPUT WAVEFORM 1; Hi (i = 1, 2, 3)  
OUTPUT WAVEFORM 2; ai, bi, ci, (i = 1, 2, ... , 8)  
2
IZ1225M  
FUNCTIONAL DESCRIPTION  
Decimal point system  
Complete floating decimal point system.  
Integral number : 8 digits leading zero suppression. Zero shift.  
Symbols  
: - : negative number display  
E : error display  
M : memory display  
, : punctuation comma  
: touch tone indicator  
Error detections  
• System errors occur when:  
1) The integral part of any memory calculation result exceeds 8 digits.  
2) The division by zero.  
3) The extraction of square root of a negative number.  
• Rough estimate calculation error  
When the integral part of the result of any standard functions, percentage, square, reciprocal,  
or power calculations exceed 8 digits.  
Error indication  
• System error  
“0” is indicated in the 1-digit position and “E” in the sign-digit position.  
• Rough estimate calculation error  
The high-order 8-digit calculation result is indicated together with “E”.  
The decimal point is indicated in the position corresponding to a calculation result of time 10-8,  
and no zero shift is performed  
Error release  
• System error  
A system error can be release by the ON/C or ON/CE key.  
• Rough estimate calculation error  
A rough estimate calculation error can be released by the ON/C, ON/CE, CE key.  
A calculation result is not cleared by ON/CE, CE key but is retained.  
Number entry  
Numerical can be entered up to 8 digits. Numerical entries equal to 9 digits or more are ignored.  
3
IZ1225M  
Memory protection  
In any error detection, the memory content is retained.  
Memory indication  
If the memory content is not zero, “M” is indicated in the sign-digit position.  
Doubler key depression  
The order of the priority when two keys are being depressed simultaneously, is as follows:  
When the OFF and ON/C key are depressed simultaneously, the OFF key is given priority.  
Key bounce protection  
Front edge  
Down to 1 word and up to about 3 words.  
Trailing edge  
9 words  
1 word is 3.3ms when display frequency is fd = 100Hz.  
DISPLAY FONTS  
• Numericals font  
Sigh font  
,
4
IZ1225M  
LCD connector  
,
.
,
.
,
,
,
.
.
.
.
.
.
H2 H3 a9  
a5 c4 b4  
c8 b8 a8 c7 b7  
c6 b6  
a4 c3 b3  
c2 b2  
c1 b1  
a2 a1 H1  
a3  
, , , a7 ,a6  
c5 b5  
,
H1  
H2  
H3  
a9 c8  
a8  
b8 c7  
a7  
b7  
c6 b6 c5  
a6  
c1  
a3  
c3 b3  
a2  
b2  
a1  
b1  
b5  
a5 c4  
c2  
a4  
b4  
AUTO POWER OFF  
Power automatically turns off after 9 - 11 minutes pass from the last key pressure. (S1 = Low, S2 =  
High)  
ON/C KEY  
All operations except memory content are cleared by ON/C key.  
TOUCH TONE ( ) KEY  
• When power is ON, the touch tone function is enable and the beep sound is generated output  
during 125ms and sing is displayed on LCD.  
• Selection of touch tone function is toggled by touch tone key.  
• Output wave form.  
ft = 2KHz  
- VOA  
- VOC  
125 ms  
MARK-UP AND MARK-DOWN CALCULATION  
Mark-up and mark-down calculation are performed as follows.  
ENTRY  
DISPLAY  
A
±
B
%
A
x
B
%
+OR-  
=
A
A
B
A
A
B
A ± AB/100  
AB/100  
AB/100  
A+AB/100 OR A --AB/100  
5
IZ1225M  
APPLICATION CIRCUIT  
GND  
0.1  
33  
µ
0.1  
6
IZ1225M  
PAD DIAGRAM  
,
2280 22  
(
130  
480  
630 780 930 1080 1230 13801530 1680 1830 1995  
2150  
35  
34  
33  
32  
31  
30  
29  
28  
26  
25  
23  
22  
27  
24  
2150  
2150  
1910  
1760  
36  
37  
38  
39  
1955  
1785  
21  
20  
19  
1655  
1505  
1610  
1460  
1310  
18  
17  
1355  
1205  
(CHIP)  
IZ1225MR  
Chip Size:: 2280 x  
PAD Size: 100 x 100  
40  
2280  
1160  
1010  
41  
42  
Unit: mm  
16  
15  
965  
860  
675  
43  
44  
45  
710  
435  
525  
375  
14  
13  
1
2
285  
130  
9
8
12  
130  
3
4
5
11  
7
10  
6
(0,0)  
2150  
30  
1
1795  
425 575 725  
1025 1185 1345 1495 1645  
875  
7
IZ1225M  
PIN DESCRIPTION  
I/O  
Description  
I/O  
Pa Pad  
Pad  
Pad  
Description  
d
Nam  
No. Name  
1
PO  
O
I
Piezo output  
Key input  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
b7  
a7  
c6  
O
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
COMMON 1  
2
3
K4  
K6  
K5  
P1  
P2  
A5  
A4  
A3  
A2  
K2  
K3  
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
Key input  
4
I
Key input  
b6  
a6  
c5  
5
O
O
O
O
O
O
I
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Key input  
6
7
b5  
a5  
c4  
8
9
10  
11  
12  
13  
14  
15  
16  
b4  
a4  
c3  
I
Key input  
Ti  
I
Test input  
b3  
a3  
c2  
VB  
VA  
VC  
b2  
a2  
c1  
17 GND  
Ground  
18  
19  
20  
21  
22  
23  
24  
H3  
H2  
a9  
c8  
b8  
a8  
c7  
O
O
O
O
O
O
O
COMMON 3  
COMMON 2  
Display output  
Display output  
Display output  
Display output  
Display output  
b1  
a1  
H1  
VGG  
TST  
Power supply  
Test  
I
8
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