Microchip 25LC512 512Kbit SPI Serial EEPROM SOIC-8

Microchip 25LC512 512Kbit SPI Serial EEPROM provides 512Kbit (64K x 8) of non-volatile serial memory in a compact 8-pin SOIC surface-mount package, accessed over a Serial Peripheral Interface (SPI) bus.

Overview

The 25LC512 is a 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. Communication requires only a clock input (SCK), separate data in (SI) and data out (SO) lines, and a chip select (CS) input. A dedicated hold pin (HOLD) allows communication to be paused, so the host microcontroller can service higher-priority interrupts without losing its place in the data stream.

Key Features

• Low-power CMOS technology designed for high reliability and endurance
• Electronic signature for secure device identification
• Sector-level write protection (16kB per sector)
• Built-in hardware protection against accidental data corruption
• Self-timed erase and write cycles, simplifying software design
• Data retention of greater than 200 years

Specifications

• Operating voltage: 2.5V to 5.5V
• Operating temperature: -40°C to +85°C
• Clock frequency: up to 20MHz
• Maximum write current: 5mA
• Read current: 10mA at 5.5V and 20MHz
• Standby current in deep power-down mode: 1μA at 2.5V
• Package: SOIC, 8 pins, surface mount
• Weight: 0.175 gm
• Dimensions (width x depth x height): 3.3 x 1.5 x 4.3

Applications

The device is suited to battery-sensitive applications, where its deep power-down mode reduces standby current. It is also suited to storing configuration parameters, calibration data, or event logs. Its combination of high speed, low power consumption, and non-volatile storage makes it a versatile solution.