CAT25640
64-Kb SPI Serial CMOS EEPROM
FEATURES
10 MHz SPI compatible
1.8V to 5.5V supply voltage range
SPI modes (0,0) & (1,1)
64-byte page write buffer
Self-timed write cycle
Hardware and software protection
Block write protection
– Protect 1/4, 1/2 or entire EEPROM array
Low power CMOS technology
1,000,000 program/erase cycles
100 year data retention
Industrial temperature range
RoHS-compliant 8 lead PDIP, SOIC, TSSOP and
8-pad TDFN packages
DESCRIPTION
The CAT25640 is a 64-Kb Serial CMOS EEPROM
device internally organized as 8Kx8 bits. This features
a 64-byte page write buffer and supports the Serial
Peripheral Interface (SPI) protocol. The device is
¯¯
enabled through a Chip Select (CS) input. In addition,
the required bus signals are clock input (SCK), data
¯¯¯¯¯
input (SI) and data output (SO) lines. The HOLD input
may be used to pause any serial communication with
the CAT25640 device. The device features software
and hardware write protection, including partial as
well as full array protection.
PIN CONFIGURATION
PDIP (L)
SOIC (V)
TSSOP (Y)
TDFN (VP2)
¯¯
CS
SO
¯¯¯
WP
V
SS
1
2
3
4
8 V
CC
¯¯¯¯¯
7 HOLD
6 SCK
5 SI
FUNCTIONAL SYMBOL
V
CC
SI
CS
WP
HOLD
SCK
CAT25640
SO
PIN FUNCTION
Pin Name
¯¯
CS
SO
¯¯¯
WP
V
SS
SI
SCK
¯¯¯¯¯
HOLD
V
CC
Function
Chip Select
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock
Hold Transmission Input
Power Supply
V
SS
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-1128 Rev. B
CATALYST [ CATALYST SEMICONDUCTOR ]
