IZ1229

1

The IZ1229 is a single chip CMOS LSI with 10-digit arithmetic operation , single memory,

extraction-of-square-root, percentage calculation, auto power off and punctuation and touch tone

function, designed for FEM LCD operation with a 1.5V power supply.

FUNCTIONS

• Four standard functions (+, -, ×, ÷ )

• Square and reciprocal calculations

• Extraction of square root

• Auto constant calculations (constant:

multiplicand, divisor,

addend and subtrahend)

• Mark-up and mark-down calculations

• Percentage calculations

• Chain multiplication and division

• Power calculations

• Rough estimate calculations

• Punctuation comma and touch tone mark display

• Clear key: ON/C, CE

• Touch tone function

FEATURES

• 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

• Bare chip is available

Direct type

LCD CONNECTION

H2 H3 a11 c10 b10 a10 c9 b9 a9 c8 b8 a8 c7 b7 a7 c6 b6 a6 c5 b5 a5 c4 b4 a4 c3 b3 a3 c2 b2 a2 c1 b1 a1 H1

Characteristic

Symbol

Value

Unit

Terminal Voltage

- 0.3 ~ + 2.1

V

V

Operating Temperature

0 ~ + 50

Storage Temperature

- 55 ~ + 125