Microchip Technology, Inc. Memory 25AA040X-I/ST

The Microchip 25AA040 is a 4 Kbit serial EEPROM designed for low-power applications, operating within a temperature range of -40¬8C to +85¬8C. It utilizes a Serial Peripheral Interface (SPI) for communication, requiring a clock input and separate data lines for input and output. The device features a memory organization of 512 x 8 bits and supports a maximum clock frequency of 1 MHz. Key specifications include a write current of 3 mA, a read current of 500 OºA, and a standby current of 500 nA. The write cycle time is a maximum of 5 ms, with an endurance of 1 million write/erase cycles and data retention exceeding 200 years. The device also includes built-in write protection features and is available in 8-pin PDIP, SOIC, and TSSOP packages. This EEPROM is suitable for applications requiring reliable data storage in industrial environments, but it is noted that it is not recommended for new designs, with alternatives suggested.