Description:

The Microchip Technology Inc. 24LCS21A is a 128 x 8-bit dual-mode Electrically Erasable PROM. This device is designed for use in applications requiring storage and serial transmission of configuration and control information. Two modes of operation have been implemented: Transmit-Only mode and Bidirectional mode. Upon power-up, the device will be in the Transmit-Only mode, sending a serial bit stream of the memory array from 00h to 7Fh, clocked by the VCLK pin. A valid high-to-low transition on the SCL

Features:

• Single supply with operation down to 2.5V

• Completely implements DDC1™/DDC2™ interface for monitor identification, including recovery to DDC1

• Low-power CMOS technology:

- 1 mA active current, typical

- 10 μA standby current, typical at 5.5V

• 2-wire serial interface bus, I2C™ compatible

• 100 kHz (2.5V) and 400 kHz (5V) compatibility

• Self-timed write cycle (including auto-erase)

• Hardware write-protect pin

• Page write buffer for up to eight bytes

• 1,000,000 erase/write cycles ensured

• Data retention > 200 years

• ESD Protection > 4000V

• 8-pin PDIP and SOIC package

• Available for extended temperature ranges:

- Commercial (C): 0°C to +70°C

- Industrial (I): -40°C to +70°C