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IZ1223M

更新时间：2025-07-09 06:03:35
品牌：INTEGRAL
描述：BASIC FUNCTION 8-DIGITS LCD CALCULATOR WITH TOUCH TONE AND PUNCTUATION FUNCTION

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免费 PCB/SMT

IZ1223M 概述

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

IZ1223M 数据手册

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IZ1223M  
BASIC FUNCTION 8-DIGITS LCD CALCULATOR WITH TOUCH  
TONE AND PUNCTUATION FUNCTION  
The IZ1223M 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 3.0V power supply.  
FUNCTIONS  
FEATURES  
• Four standard functions (+, -, ×, ÷ )  
• Auto constant calculations (constant: multiplicand,  
divisor,  
• Single chip CMOS construction  
• Floating decimal point  
• LCD direct drive  
• Overflow indication: “E”  
• Accumulating memory: M+, M-, RM,  
CM, RM/CM  
addend and subtrahend)  
• Square and reciprocal calculations  
• Mark-up and mark-down calculations  
• Extraction of square root  
• Percentage calculations  
• Chain multiplication and division  
• Power calculations  
• Bare chip available  
• Mirror type  
• Rough estimate calculations  
• Touch tone function  
• Punctuation comma display  
• Clear key: ON/C, ON/CE, CE  
ABSOLUTE MAXIMUM RATINGS (Ta = 25oC)  
Characteristic  
Symbol  
Value  
Unit  
Note  
VGG  
VIN  
VGG  
TOPR  
Tstg  
- 0.3 ~ + 3.5  
- 0.3 ~ VGG + 0.3  
2.5 ~ 3.5  
V
V
1
Terminal Voltage  
Supply Voltage  
Operating Temperature  
Storage Temperature  
V
0 ~ + 50  
- 55 ~ + 125  
oC  
oC  
Note: 1. Maximum voltage on any pin with respect to the GND  
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VGG = 3.0V, unless otherwise specified)  
Characteristic  
Symbo  
l
Test Condition  
Min  
Typ Max Uni  
t
Input Voltage 1 (K2 ~ K6, TI,  
S2)  
VIH1  
VIL1  
VIH2  
VGG - 0.4  
VGG - 0.4  
V
0.4  
Input Voltage 2 (S1)  
V
VIL2  
0.2  
IIH1  
IIL1  
IIH2  
IIL2  
IIH3  
IIL3  
IIH4  
VIN = VGG  
VIN = 0V  
VIN = VGG  
1
10  
1
1
1
Input Current 1 (K2 ~ K6, TI)  
Input Current 2 (S2)  
A
5.5  
A
VIN = 0V  
VIN = VGG S2=GN  
VIN = 0V  
Input Current 3 (S1)  
Input Current 4 (S1)  
A
A
D
5
20  
10  
30  
15  
40  
VIN = VGG  
S2 =  
1
IZ1223M  
Characteristic  
Symbo  
Test Condition  
Min  
Typ Max Uni  
l
t
VGG  
VIN = 0V  
without load  
IIL4  
VOH1  
1
Output Voltage 1 (P1, P2,  
A2~A5)  
VGG -  
0.15  
V
VOL1  
VOA  
VOB  
0.15  
2.95  
1.50 1.70  
I
OUT = 15µA  
Output Voltage 2 (H1 ~ H3,  
a1 ~ a9, b1 ~ b8, c1  
~ c8)  
without load  
without load  
2.80  
1.30  
V
VOC  
Fd  
without load  
0
0.20  
V
GG = 3V while  
Display Frequency  
Touch Tone (PO)  
Output Drive Current  
50  
3
75  
Hz  
display is on,  
GG = 3V, VOL =  
0.5V, TI =3V  
GG = 3V, VOL =  
V
IOL  
IOH  
mA  
V
-3  
0.5V, TI =3V  
Display off, VGG  
3V  
=
IOFF (1)  
0.1  
30  
Dissipation  
V
GG = 3V while  
Idis (2)  
20  
A
display is on,  
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)  
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  
2
IZ1223M  
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.  
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:  
3
IZ1223M  
5
6
0
4
.
9
-
8
RM/CM  
OFF  
=
ON/C  
M +  
ON/CE  
x
.
.
1
3
2
CM  
7
CE  
+
M -  
%
RM  
+/-  
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  
,
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  
a7  
a6  
a3  
c5 b5  
4
IZ1223M  
,
, , , ,  
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
IZ1223M  
APPLICATION CIRCUIT  
GND  
33  
µ
6
IZ1223M  
PAD DIAGRAM  
7
IZ1223M  
PIN DESCRIPTION  
Pa  
d
Pad I/O  
Name  
Description  
Pad  
No.  
Pad  
Name  
I/O  
Description  
1
PO  
K4  
K6  
K5  
P1  
P2  
A5  
A4  
A3  
A2  
K2  
K3  
Ti  
O
Piezo output  
Key input  
23  
a7  
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  
COMMON 1  
2
I
I
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
c6  
b6  
a6  
c5  
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
3
Key input  
4
I
Key input  
5
O
O
O
O
O
O
I
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Strobe output  
Key input  
6
b5  
a5  
c4  
7
8
9
b4  
a4  
c3  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
I
Key input  
b3  
a3  
c2  
I
Test input  
GND  
H3  
H2  
a9  
Ground  
O
O
O
O
O
O
O
O
COMMON 3  
COMMON 2  
Display output  
Display output  
Display output  
Display output  
Display output  
Display output  
b2  
a2  
c1  
c8  
b1  
a1  
H1  
VGG  
TST  
b8  
a8  
c7  
Power supply  
Test  
b7  
I
8

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