MICROCHIP 25LC512 512Kbit (64K x 8) SPI Serial EEPROM, SOIC-8

The MICROCHIP 25LC512-I/SN is a 512Kbit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) that combines byte-level and page-level write functions with sector and chip erase capabilities, offering flexibility typically found in flash memory. It is accessed via a simple Serial Peripheral Interface (SPI) bus, requiring only a clock input (SCK), separate data in (SI) and data out (SO) lines, and a chip select (CS) input for control. A dedicated hold pin (HOLD) allows communication to be paused, enabling the host microcontroller to service higher-priority interrupts without losing its place in the data stream.

Crafted with low-power CMOS technology, this EEPROM is designed for high reliability and endurance. It features an electronic signature for secure device identification and includes robust write protection mechanisms, including sector-level protection (16kB per sector) and built-in hardware protection to prevent accidental data corruption. All erase and write cycles are self-timed, simplifying software design.

Key Performance Specifications

• Power Efficiency: Operates with a maximum write current of 5mA and a read current of 10mA at 5.5V and 20MHz. In deep power-down mode, standby current drops to just 1μA at 2.5V, making it ideal for battery-sensitive applications.
• Data Integrity: Offers exceptional data retention of greater than 200 years, ensuring long-term reliability for stored configuration parameters, calibration data, or event logs.
• Wide Operating Range: Supports a supply voltage from 2.5V to 5.5V and operates across an industrial temperature range of -40°C to +85°C.

Physical and Electrical Details

The memory is configured as 64K x 8 bits and is housed in a compact, surface-mount SOIC package with 8 pins. Its combination of high speed (up to 20MHz clock frequency), low power consumption, and non-volatile storage makes it a versatile solution