X20C17

2

PIN DESCRIPTIONS

The Address inputs select an 8-bit memory location

during a read or write operation.

Chip Enable (

CE)

The Chip Enable input must be LOW to enable all read/

write operations. When

CE is HIGH, power consumption

is reduced.

Output Enable (

OE)

The Output Enable input controls the data output buffers

and is used to initiate read and recall operations. Output

Enable LOW disables a store operation regardless of

the state of

CE, WE.

Data is written to or read from the X20C17 through the

I/O pins. The I/O pins are placed in the high impedance

state when either

CE or OE is HIGH.

Write Enable (

WE)

The Write Enable input controls the writing of data to the

static RAM.

FUNCTIONAL DIAGRAM

2015 FHD F01.1

PIN NAMES

Symbol

Description

Address Inputs

Data Input/Output

WE

Write Enable

CE

Chip Enable

OE

Output Enable

+5V

Ground

2015 PGM T01

VCC SENSE

ROW

SELECT

CONTROL

LOGIC

COLUMN

SELECT

&

I/OS

EEPROM ARRAY

HIGH SPEED

2K x 8

SRAM

ARRAY

CE

OE

WE

A3–A8

I/O0–I/O7

A0–A2

A9–A10