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Circuit Descriptions and List of Abbreviations
2
COMPATIBLE with I
C EXTENDED
ADDRESSING
TWO WIRE SERIAL INTERFACE,
SUPPORTS 400kHz PROTOCOL
1 MILLION ERASE/WRITE CYCLES, OVER
the FULL SUPPLY VOLTAGE RANGE
40 YEARS DATA RETENTION
SINGLE SUPPLY VOLTAGE
± 4.5V to 5.5V for ST24E32 version
± 2.5V to 5.5V for ST25E32 version
WRITE CONTROL FEATURE
BYTE and PAGE WRITE (up to 32 BYTES)
BYTE, RANDOM and SEQUENTIAL READ
MODES
SELF TIMED PROGRAMING CYCLE
AUTOMATIC ADDRESS INCREMENTING
ENHANCED ESD/LATCH UP
PERFORMANCES
ST24E32 and ST25E32 are replaced by the
M24C32
DESCRIPTION
The ST24/25E32 are 32K bit electrically erasable
programmable memories (EEPROM), organized
as 8 blocks of 512 x 8 bits. The ST25E32 operates
with a power supply value as low as 2.5V. Both
Plastic Dual-in-Line and Plastic Small Outline pack-
ages are available.
Table 1. Signal Names
E0 - E2
Chip Enable Inputs
SDA
Serial Data Address Input/Output
SCL
Serial Clock
WC
Write Control
V
Supply Voltage
CC
V
Ground
SS
SACD 900
32K SERIAL I
with EXTENDED ADDRESSING
8
1
PSDIP8 (B)
0.25mm Frame
Figure 1. Logic Diagram
V CC
3
E0-E2
ST24E32
SCL
ST25E32
WC
V SS
9.
EN 141
ST24E32
ST25E32
2
C EEPROM
NOT FOR NEW DESIGN
8
1
SO8 (M)
200mil Width
SDA
AI01201B
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