2

X24C45

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 X24C45 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.

AUTOSTORE Output (

AS)

AS is an open drain output which, when asserted indi-

outputs and used as an interrupt input to a microcontroller

or as an input to a low power reset circuit.

RECALL

RECALL LOW will initiate an internal transfer of data

PIN NAMES

Symbol

Description

CE

Chip Enable

SK

Serial Clock

DI

Serial Data In

DO

Serial Data Out

RECALL

Recall Input

AS

AUTOSTORE Output

+5V

Ground

3833 PGM T01

3833 FHD F02.1

CE

SK

DI

DO

1

2

3

4

8

7

6

5

VCC

AS

RECALL

VSS

X24C45

DIP/SOIC