SPI-Compatible Serial SRAM Devices

Microchip's SRAM family provides a way to easily add external RAM

Image of Microchip Technology's SPI-Compatible Serial SRAM DevicesMicrochip’s new serial SRAM family 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. Also, they allow designers to use a smaller microcontroller rather than moving to a larger microcontroller just to get more on-board RAM. SPI-compatible serial SRAM devices from Microchip are available in 64 and 256 Kbit options. These devices provide high-speed performance at low power making them ideal for embedded applications needing more RAM. The devices use fewer pins with fewer interface connections and smaller packages thus ensuring smaller designs and lower system costs.

Features
  • Low power CMOS technology: 4 µA max standby current
  • Standard 4-pin SPI interface: chip select, data in, data out, and clock
  • 8-bit status register controls operational modes: byte, page, and sequential
  • 32-byte page
  • High-speed SPI bus with 20 MHz maximum speed
  • Industrial temperatures range: -40°C to +85°C
  • Small, 8-lead SOIC, TSSOP and PDIP packages

SPI-Compatible Serial SRAM Devices

ImageManufacturer Part NumberDescriptionAvailable Quantity
23K256-I/SN datasheet linkIC SRAM 256KBIT 20MHZ 8SOIC23K256-I/SNIC SRAM 256KBIT 20MHZ 8SOIC8644 - Immediate
23K256-I/SN product page link
23K256-I/ST datasheet linkIC SRAM 256KBIT 20MHZ 8TSSOP23K256-I/STIC SRAM 256KBIT 20MHZ 8TSSOP8362 - Immediate
23K256-I/ST product page link
23K640-I/SN datasheet linkIC SRAM 64KBIT 20MHZ 8SOIC23K640-I/SNIC SRAM 64KBIT 20MHZ 8SOIC2062 - Immediate
23K640-I/SN product page link
23K640-I/ST datasheet linkIC SRAM 64KBIT 20MHZ 8TSSOP23K640-I/STIC SRAM 64KBIT 20MHZ 8TSSOP742 - Immediate
23K640-I/ST product page link
23K256-I/P datasheet linkIC SRAM 256KBIT 20MHZ 8DIP23K256-I/PIC SRAM 256KBIT 20MHZ 8DIP330 - Immediate
23K256-I/P product page link
23A256-I/SN datasheet linkIC SRAM 256KBIT 20MHZ 8SOIC23A256-I/SNIC SRAM 256KBIT 20MHZ 8SOIC368 - Immediate
23A256-I/SN product page link
23A256-I/ST datasheet linkIC SRAM 256KBIT 20MHZ 8TSSOP23A256-I/STIC SRAM 256KBIT 20MHZ 8TSSOP290 - Immediate
23A256-I/ST product page link
23A640-I/P datasheet linkIC SRAM 64KBIT 20MHZ 8DIP23A640-I/PIC SRAM 64KBIT 20MHZ 8DIP764 - Immediate
23A640-I/P product page link
23A640-I/SN datasheet linkIC SRAM 64KBIT 20MHZ 8SOIC23A640-I/SNIC SRAM 64KBIT 20MHZ 8SOIC023A640-I/SN product page link
23K640-I/P datasheet linkIC SRAM 64KBIT 20MHZ 8DIP23K640-I/PIC SRAM 64KBIT 20MHZ 8DIP023K640-I/P product page link
23A256-I/P datasheet linkIC SRAM 256KBIT 20MHZ 8DIP23A256-I/PIC SRAM 256KBIT 20MHZ 8DIP023A256-I/P product page link
Published: 2012-08-28