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ST24FW21B6TR View Datasheet(PDF) - STMicroelectronics

Part Name
Description
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ST24FW21B6TR Datasheet PDF : 22 Pages
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ST24LC21B, ST24LW21
ST24FC21, ST24FC21B, ST24FW21
1 Kbit (x8) Dual Mode Serial EEPROM
for VESA PLUG & PLAY
1 MILLION ERASE/WRITE CYCLES
40 YEARS DATA RETENTION
3.6V to 5.5V or 2.5V to 5.5V SINGLE SUPPLY
VOLTAGE
HARDWARE WRITE CONTROL (ST24LW21
and ST24FW21)
TTL SCHMITT-TRIGGER on VCLK INPUT
100k / 400k Hz COMPATIBILITY with the I2C
BUS BIT TRANSFER RANGE
TWO WIRE SERIAL INTERFACE I2C BUS
COMPATIBLE
I2C PAGE WRITE (up to 8 Bytes)
I2C BYTE, RANDOM and SEQUENTIAL READ
MODES
SELF TIMED PROGRAMMING CYCLE
AUTOMATIC ADDRESS INCREMENTING
ENHANCED ESD/LATCH UP
PERFORMANCES
ERROR RECOVERY MECHANISM
(ST24FC21 and ST24FW21) VESA 2
COMPATIBLE
DESCRIPTION
The ST24LC21B, ST24LW21, ST24FC21,
ST24FC21B and ST24FW21 are 1K bit electrically
erasable programmable memory (EEPROM), or-
ganized in 128x8 bits. In the text, products are
referred as ST24xy21, where "x" is either "L" for
VESA 1 or "F" for VESA 2 compatible memories
and where "y" indicates the Write Control pin con-
nection: "C" means WC on pin 7 and "W" means
WC on pin 3.
8
1
PSDIP8 (B)
0.25mm Frame
8
1
SO8 (M)
150mil Width
Figure 1. Logic Diagram
VCC
SCL
VCLK
WC
ST24xy21
SDA
Table 1. Signal Names
SDA
SCL
Serial Data Address Input/Output
Serial Clock (I2C mode)
VCC
VSS
VCLK
Supply Voltage
Ground
Clock Transmit only mode
WC
Write Control
June 2002
VSS
AI01741
Note: WC signal is only available for ST24LW21 and ST24FW21
products.
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