X24C45P Xicor, X24C45P Datasheet - Page 2

• Manufacturer Part Number: X24C45P
• Description: Serial AUTOSTORE NOVRAM
• Manufacturer: Xicor

X24C45
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-
cates V
(V
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
from E
ASTH
2
). AS may be wire-ORed with multiple open drain
CC
PROM to the RAM array.
has fallen below the AUTOSTORE threshold
2
PIN CONFIGURATION
PIN NAMES
CE
SK
DI
DO
RECALL
AS
V
V
Symbol
CC
SS
DO
CE
SK
DI
1
2
3
4
DIP/SOIC
X24C45
Chip Enable
Serial Clock
Serial Data In
Serial Data Out
Recall Input
AUTOSTORE Output
+5V
Ground
Description
8
7
6
5
V CC
AS
RECALL
V SS
3833 FHD F02.1
3833 PGM T01