MCHP25AA640A-I/SN

Overview

The 25AA640A-I/SN is a 64 Kbit serial EEPROM organized as 8K x 8 bits, utilizing a high-speed SPI bus interface. It operates across a wide voltage range of 1.8V to 5.5V and supports clock speeds up to 10 MHz, making it suitable for low-power embedded systems requiring non-volatile storage. The device includes robust data protection features such as a write-protect pin and block write protection.

Why Choose This Part

The part features extremely low power consumption with a standby current of only 1 uA and a maximum run current of 5 mA at 10 MHz. Its wide 1.8V to 5.5V supply range ensures compatibility with both legacy 5V systems and modern low-voltage microcontrollers. Additionally, the AEC-Q100 qualification and high reliability make it a stable choice for demanding environments.

Applications

Getting Started

Interface the device with any microcontroller supporting SPI Mode 0 or Mode 3. Use the WP pin to hardware-protect the memory array and the HOLD pin to pause serial communication without resetting the serial sequence. Development can be accelerated using Microchip MPLAB Starter Kits or generic SPI libraries for platforms like Arduino or STM32.

Also Consider

AT25640B-SSHL-T MCHPMicrochip Technology - An alternative 64Kbit SPI EEPROM with a wider 20 MHz clock support at higher supply voltages.

M95640-RMN6P STMicroelectronics - A comparable 64Kbit SPI EEPROM featuring high endurance of up to 4 million write cycles.

25LC640A-I/SN MCHPMicrochip Technology - The LC version is optimized for higher voltage operation (2.5V to 5.5V) but offers higher clock speeds at the lower end of its range.

Categories