DESCRIPTION

The Microchip Technology Inc. 25AA040/25LC040/25C040 (25xx040*) is a 4K bit serial Electrically Erasable PROM. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input.

FEATURES

• Low power CMOS technology

   - Write current: 3 mA typical

   - Read current: 500 µA typical

   - Standby current: 500 nA typical

• 512 x 8 bit organization

• 16 byte page

• Write cycle time: 5ms max.

• Self-timed ERASE and WRITE cycles

• Block write protection

   - Protect none, 1/4, 1/2, or all of array

• Built-in write protection

   - Power on/off data protection circuitry

   - Write enable latch

   - Write protect pin

• Sequential read

• High reliability

   - Endurance: 10M cycles (guaranteed)

   - Data retention: > 200 years

   - ESD protection: > 4000 V

• 8-pin PDIP, SOIC, and TSSOP packages

• Temperature ranges supported:

   - Commercial: (C) 0°C to +70°C

   - Industrial: (I) -40°C to +85°C

   - Automotive: (E) (25C040) -40°C to +125°C