Microchip Technology Serial SRAM

Microchip Technology Serial SRAM provides a way to easily and inexpensively add external RAM to almost any application. These serial devices use less power and fewer I/O connections than traditional parallel SRAM, and they allow you to use a smaller microcontroller with additional on-board RAM. These SPI-compatible Serial SRAM devices are available in 64Kbits, 256Kbits, 512Kbits and 1Mbit options and up to20MHz. The 512 Kbits and 1 Mbit parts support data backup via an external battery/coin cell connected V_bat pin. These 8-pin devices have unlimited endurance and zero write times.