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ST24LW21B6TR 데이터시트(PDF) 1 Page - STMicroelectronics |
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ST24LW21B6TR 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 22 page ST24LC21B, ST24LW21 ST24FC21, ST24FC21B, ST24FW21 1 Kbit (x8) Dual Mode Serial EEPROM for VESA PLUG & PLAY June 2002 1/22 AI01741 SDA VCC ST24xy21 VCLK SCL VSS WC Figure 1. Logic Diagram 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. SDA Serial Data Address Input/Output SCL Serial Clock (I 2C mode) VCC Supply Voltage VSS Ground VCLK Clock Transmit only mode WC Write Control Table 1. Signal Names 8 1 SO8 (M) 150mil Width 8 1 PSDIP8 (B) 0.25mm Frame Note: WC signal is only available for ST24LW21 and ST24FW21 products. |
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