IZ1239M
8 - DIGITS CURENCY CALCULATOR
The IZ1239M are a single chip CMOS LSI with 8-digit arithmetic operation, single memory,
extraction-of-square-root, percentage calculation and auto power off function, designed for FEM
LCD operation with a 1.5V power supply. The IZ1239M has special keys (C1, C2, SM, RM) for
currency exchange calculations and special memory for save currency rate. The result of
currency exchange operations formatted to two decimal always and rounded if it exceeds two
decimal.
FUNCTIONS
FEATURES
• Four standard functions (+, -, ×, ÷ )
• The result of currency exchange operation is
rounded to two decimal
• Single chip CMOS construction
• Floating decimal point
• LCD direct drive
• Auto constant calculations
• Mark-up and mark-down calculations
• Percentage calculations
• Chain multiplication and division
• Power calculations
• Special memory for currency rates
• Overflow indication: “E”
• On-chip oscillator components
• Mirror LCD
• Punctuation comma
• Rough estimate calculations
• Clear key: ON/C, CE
• Currency exchange calculations :
Currency 1 → Currency 2 and
Currency 2 → Currency 1
• Auto Power off
• Saving special memory contents when auto
power off
• Accumulating memory: M+, M-, MR, MC, MRC
• Currencies C1, C2, SMR, SMW and Rate
indication
• Rounded function (option)
• Formatting function
• Bare chip is available
ABSOLUTE MAXIMUM RATINGS ( Ta = 25oC )
Characteristic
Terminal Voltage
Symbol
VDD
VIN
Value
- 0.3 ~ + 2.1
- 0.3 ~ VDD + 0.3
1.1 ~ 1.8
0 ~ + 50
- 55 ~ + 125
Unit
V
V
Supply Voltage (Battery)
Operating Temperature
Storage Temperature
VDD
Ta
Tstg
V
oC
oC
1
