IZ1242M

1

Scientific 10 Digits LCD Calculator

The IZ1242M is the CMOS LSI for 10-digit display and the complete single chip for scientific

calculator with 56 programmed functions.

FEATURES

• Display

-10 display digits plus negative code digit

- scientific and engineering displays

- 8 mantissa digits plus 2 exponent digits plus 2

negative code digits

• 14 kinds of special display

M

-

E

2ndF

HYP

DEG

RAD

Memory

Minus

Error

2nd

Function

Hyperbolic

Degree

Radian

GRAD

(

)

BIN

OCT

HEX

CPLX

STAT

Gradient

Parenthesis

Binary mode

Octal mode

Hexadecimal

mode

Complex number

mode

Statistic

calculation mode

FUNCTIONS

• Six operations

- four standard functions (+, -,

×, ÷ )

- y

x

-

√y

- auto-constant

- parenthesis

- percentage

• Memory calculation

- independent single memory (

× → M, RM, M+)

• Four operations complex number calculation

• 1-variable functions

- trigonometric and arctrigonometric function

- hyperbolic and archyperbolic function

- factorial

- reciprocal and square

- square root and cube root

- time conversions

- angular mode conversion

• 2-variable functions

- polar-rectangular coordinate conversion

• Statistics calculations

- number of sample (n)

- average (

×)

- total of all data (

Σ ×)

- total of square of all data (

- 2 kinds of the standard deviation (S,

σ)

• Binary, octal, decimal and hexadecimal

number

calculations

- mutual conversions and calculations of binary,

octal,

decimal, and hexadecimal numbers

• Display conversion

- conversion and setting of floating and

engineering displays

• The minus sign of the mantissa is floating minus

• The arithmetic key operation has the same

sequence

as the mathematical equation, 6 pending

operations

are allowed and ( ) are up to continuous 15

levels

• Mutual conversion and calculation in arithmetic

among binary, octal, decimal and hexadecimal

numbers

• One independent accumulating memory

• It is possible to convert and fix the display

number

system by the F

→ E key

• It is possible to specify decimal part digits by the

TAB key

• Direct drive for LCD (1/3 prebias, 1/4 duty)

• Automatic power off (about 7.5 minutes)

• Low power consumption

• Bare chip available

• Mirror type

Characteristic

Symbol

Value

Unit

- 0.3 ~ + 3.3

V

Terminal Voltage

V

Operating Temperature

0 ~ + 40

Storage Temperature

- 55 ~ + 125

* Voltage greater than above may damage the circuit

IZ1242M