ST24E64
ST25E64
SERIAL EXTENDED ADDRESSING COMPATIBLE
WITH I
2
C BUS 64K (8K x 8) EEPROM
PRELIMINARY DATA
COMPATIBLE with I
2
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
鈥?4.5V to 5.5V for ST24E64 version
鈥?2.5V to 5.5V for ST25E64 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
8
1
PSDIP8 (B)
0.25mm Frame
8
1
SO8 (M)
200mil Width
Figure 1. Logic Diagram
VCC
DESCRIPTION
The ST24/25E64 are 64K bit electrically erasable
programmable memories (EEPROM), organized
as 8 blocks of 1024 x 8 bits. The ST25E64 operates
with a power supply value as low as 2.5V. Both
Plastic Dual-in-Line and Plastic Small Outline pack-
ages are available.
3
E0-E2
SCL
WC
ST24E64
ST25E64
SDA
Table 1. Signal Names
E0 - E2
SDA
SCL
WC
V
CC
V
SS
Chip Enable Inputs
Serial Data Address Input/Output
Serial Clock
Write Control
Supply Voltage
Ground
VSS
AI01204B
November 1996
This is preliminary information on a new product now in development or undergoing evaluatio n.Details are subject to change without notice.
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