The Microchip series of serial SRAM provides an almost can add external RAM on any application method, this method costs are relatively cheap, simple operation, compared with the traditional parallel SRAM, the 8 pin serial devices of lower power consumption, the less I/O number of connections, use of these devices, the designer can use smaller micro controller, rather than just in order to obtain greater onboard RAM and switch to a larger device, zero write cycle time to make these devices is very suitable for the graphics, data buffer, data record, display, mathematics, audio, video and other data intensive function unloading to independent SRAM, compared with the standard SPI, SDI and SQI allows you to use 2 times and 4 times data rate, Microchip SPI compatible type serial SRAM devices 64256512 and 1024 KB four capacity for users to choose, these devices with low power consumption to achieve high speed performance, very suitable for embedded application need more RAM,

In addition, these 512 KB and 1 MB device also has the Vbat pin used for battery backup, so when an external battery or super capacitor is connected to the pin, the device is non-volatile, these serial NVSRAM devices have infinite life and instantaneous write function, such as scale, especially useful application such as black box and data recorders,