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| IZ1278U Datasheet, PDF (1/4 Pages) Integral Corp. – 10/12-DIGIT SELECTABLE DESK TOP CALCULATOR | |||
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IZ1278U
10/12-DIGIT SELECTABLE DESK TOP CALCULATOR
The IZ1278 is a single chip CMOS LSI with 10-digit or 12-digit arithmetic operation, 2-
memory, extraction-of-square-root, percentage, MU calculation and auto power off
function, designed for FEM LCD operation with a 1.5V power supply.
FUNCTIONS
FEATURES
⢠10/12 digits selectable display by diode option
⢠Four standard functions (+, -, Ã, ÷ )
⢠Memory, GT (grand total) memory calculations
⢠Auto-percentage calculations (add on, discount)
⢠Constant calculations
⢠Square root calculations
⢠Chain calculations
⢠MU calculations
⢠Power calculations
⢠Rough estimate calculations
⢠Change sign
⢠Single chip CMOS construction
⢠Floating point or memory mode (sw selectable)
⢠Fixed point (0,2,3,4) and adding point mode
⢠Rounding switches (rounding up, down and off)
⢠Leading and trailing zero suppression
⢠Punctuation comma display for thousands
⢠LCD direct drive
⢠Over flow indication: âEâ
⢠On-chip key board debouncing and encoding
⢠Wide supply voltage range (1.2V ~ 2.0V)
⢠Very low power consumption (7µw TYP)
⢠PKG type: 64 QFP and bare chip available
⢠Symbols: GT, M, -, E, K, +, -, Ã, ÷
ABSOLUTE MAXIMUM RATINGS ( Ta = 25oC )
Characteristic
Symbol
Value
Unit
Terminal Voltage
Operating Temperature
Storage Temperature
VDD
- 0.3 ~ + 2.0
V
VIN
- 0.3 ~ VDD + 0.3
V
Ta
0 ~ + 40
oC
Tstg
- 55 ~ + 125
oC
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VDD = 1.5V, VSS = 0V unless otherwise specified)
Characteristic
Symbol
Test Condition
Min
Typ Max Unit
High Input Voltage(K3~K10)
VIH
(K11~K12)
VIH
Low Input (KI)
VIL
Voltage
(K3~K12)
High Output Voltage(K1~K8) VOH
Low Output Voltage(K1~K8)
VOL
Key Pull
(KI)
Rpd1
Down
Resistor
(K1 ~ K10)
Rpd2
Key Pull Up (KI)
Rpu1
Resistor
(K1 ~ K10)
Rpu2
(K11 ~ K12)
Rpu3
High Output Voltage (LCD,
VOH
COM)
âMâ Output Voltage (LCD,
VOM
COM)
Low Output Voltage (LCD,
VOL
Vout = 0.3V
Vout = 1.2V
Vout = 2.7V
VDD - 0.4
VCC - 0.4
VSS
VDD
V
VCC
0.4
V
VDD - 0.2
VDD
V
VSS
0.2
V
0.5
1
1.5 Kâ¦
10
17
28
145
170
195
0.6
1.2
1.9 Kâ¦
250
400
550
VCC -0.2
VCC
V
VDD -0.2
VDD
V
VSS
0.2
V
1
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