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 connection: C means WC on pin 7 and W means WC on pin 3.

• 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