25LC040A-E/P

The Microchip Technology 25LC040A-E/P is a 4 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) accessed via a Serial Peripheral Interface (SPI) compatible serial bus. It features a maximum clock frequency of 10 MHz and operates within a voltage range of 2.5V to 5.5V.

This EEPROM offers a memory organization of 512 x 8 bits and supports write page mode with up to 16 bytes per page. It also includes sequential read capabilities and self-timed erase and write cycles, with a maximum write cycle time of 5 ms. The device provides block write protection options, allowing for protection of none, 1/4, 1/2, or the entire array. Built-in write protection features include power-on/off data protection circuitry, a write enable latch, and a write-protect pin.

Designed for reliability, the 25LC040A-E/P boasts an endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years. It also offers ESD protection greater than 4000V. The operating temperature range is -40°C to 125°C (TA).

The component is supplied in an 8-PDIP package, suitable for through-hole mounting. Its SPI interface requires clock (SCK), data in (SI), and data out (SO) lines, with device access controlled by a Chip Select (CS) input. A HOLD pin is available to pause communication.