IZ12291M
10-DIGITS CALCULATOR
The IZ12291M is a single chip CMOS LSI with 10-digit arithmetic operation, single
memory, extraction-of-square-root, percentage calculation, auto power off and punctuation ,
designed for FEM LCD operation with a 1.5V power supply.
FUNCTIONS
FEATURES
• Four standard functions (+, -, ×, ÷ )
• Square and reciprocal calculations
• Extraction of square root
• Single chip CMOS construction
• Floating decimal point
• LCD direct drive
• Overflow indication: “E”
• On chip oscillator components
• Auto Power off
• Accumulating memory: M+, M-, MR, MC,
MRC
• Auto constant calculations (constant: multiplicand,
divisor,
addend and subtrahend)
• Mark-up and mark-down calculations
• Percentage calculations
• Chain multiplication and division
• Power calculations
• Bare chip is available
Mirror type
• Rough estimate calculations
• Punctuation comma and touch tone mark display
• Clear key: ON/C, CE
LCD CONNECTION
H1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5
b5 c5 a6 b6 c6 a7 b7 c7 a8 b8 c8 a9 b9 c9 a10 b10 c10 a11 H3 H2
ABSOLUTE MAXIMUM RATINGS ( Ta = 25oC )
Characteristic Symbol
Value
Unit
Terminal Voltage VCC
- 0.3 ~ + 2.1
- 0.3 ~ VCC + 0.3
0 ~ + 50
V
V
VIN
Ta
Operating Temperature
Storage Temperature
oC
oC
Tstg
- 55 ~ + 125
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VCC = 1.5V, unless otherwise specified)
Characteristic
Symbol
Test Condition
Min
Typ
Max
Unit
Operating
Voltage
Input Voltage
(pins FDISB,
EXT)
VOP
1.1
1.5
1.8
V
V
VIH
VIL
VCC - 0.4
0.4
Input Current 1
(pins FDISB,
EXT)
IIH1
IIL1
VIN = VCC
VIN = 0V
1
3
µA
µA
1.5
2.5
Input Current 2
IIH2
VIN = VCC; APODISB =
0V
1
1
