CAT25320
32-Kb SPI Serial CMOS EEPROM
FEATURES
10 MHz SPI compatible
1.8V to 5.5V supply voltage range
SPI modes (0,0) & (1,1)
32-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 CAT25320 is a 32-Kb Serial CMOS EEPROM
device internally organized as 4096x8 bits. This
features a 32-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
¯¯¯¯¯ input may be used to pause any serial
HOLD
communication with the CAT25320 device. The
device features software and hardware write protec–
tion, 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
CAT25320
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
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 1111 Rev. E
CATALYST [ CATALYST SEMICONDUCTOR ]
