ST24FC21B

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), organized 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. 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 VCC VSS VCLK WC Serial Data Address Input/Output 2 Serial Clock (I C mode) VSS AI01741 Supply Voltage Ground Clock Transmit only mode Write Control Note: WC signal is only available for ST24LW21 and ST24FW21 products. June 2002 1/22 ST24LC21B, ST24LW21, ST24FC21, ST24FC21B, ST24FW21 Figure 2A. DIP Pin Connections Figure 2B. SO...