Microchip 25CSM04-I/SN, 4Mbit EEPROM Chip, 40ns 8-Pin SOIC Serial

The Microchip 25CSM04 is a 4 Mb Serial EEPROM with a Serial Peripheral Interface (SPI) capable of operation across a broad voltage range (2.5V to 5.5V). The device is organized as one block of 524,288 bytes of 8-bits each (512 Kbyte).It includes a security register with a 128-bit unique serial number and a 256-byte (2048-bit) user-programmable lockable ID page, built in ECC, and a configurable write protection scheme for all bytes. The 25CSM04 is optimized for use in consumer electronics, industrial, and medical applications where reliable and dependable non-volatile memory storage is essential, and is packaged in SOIC, DFN, and WLCSP purchase options.

524,288 x 8 bit
page size of 256 bytes
Byte or sequential reads
byte or page writes
Self-timed write cycle (5 Ms maximum)
Security register featuring preprogramed 128-bit serial number and 256-byte user-programmable lockable ID page
Built-in Error Correction Code (ECC) Logic with ECC Status bit via the STATUS register
JEDEC(R) SPI Manufacturer Read ID Support

Datasheet - 25CSM04-I/SN