X24C44PI datasheet(2/15 Pages) XICOR

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X24C44

PIN CONFIGURATION

PIN DESCRIPTIONS

Chip Enable (CE)

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

write operations. CE must remain HIGH following a

Read or Write command until the data transfer is com-

plete. CE LOW places the X24C44 in the low power

standby mode and resets the instruction register. There-

fore, CE must be brought LOW after the completion of an

operation in order to reset the instruction register in

preparation for the next command.

Serial Clock (SK)

The Serial Clock input is used to clock all data into and

out of the device.

Data In (DI)

Data In is the serial data input.

Data Out (DO)

Data Out is the serial data output. It is in the high

impedance state except during data output cycles in

response to a READ instruction.

STORE

STORE LOW will initiate an internal transfer of data from

RAM to the E2PROM array.

RECALL

RECALL LOW will initiate an internal transfer of data

from E2PROM to the RAM array.

PIN NAMES

Symbol

Description

Chip Enable

Serial Clock

Serial Data In

Serial Data Out

RECALL

Recall Input

STORE

Store Input

VCC

+5V

VSS

Ground

3832 PGM T01

3832 FHD F02.2

VCC

STORE

RECALL

VSS

X24C44

PDIP/CERDIP/SOIC

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