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Microchip Technology Serial SRAM

SPI-compatible Serial SRAM devices from Microchip Technology are available in 64 and 256 Kbit options. Microchip SRAM devices provide high-speed performance at low power making them ideal for embedded applications needing more RAM. Microchip SRAM devices use fewer pins with fewer interface connections and smaller packages thus ensuring smaller designs and lower system costs.

There have traditionally been two ways to increase an application's RAM:
1. Use a larger microcontroller. This option is less attractive if you must buy a large microcontroller just to get more RAM.
2. Use external parallel RAM. But, parallel RAM uses large packages and typically requires 16-20 I/Os.
Serial SRAM now offers the flexibility to add RAM to a design without the disadvantages of a large microcontroller or parallel RAM.