Silicon Storage Technology has a family of 4-bit multiplexed I/O serial interface flash memory devices.

The 80MHz operating frequency and an optimised instruction set means the devices can be used in execute-in-place (XIP) applications. This is a technique which allows programs to be stored and executed directly from the flash memory without the need for code shadowing on an SRAM.

Called the 26 Series SQI, the devices feature a 4-bit multiplexed serial interface architecture and up to a 350Mbit/s sustained burst data rate, which more than matches typical parallel flash memory.  

To provide additional system speed and performance, the 26 Series supports 8-, 16-, 32- and 64-Byte burst mode operation with wrap around, which reduces the memory’s read access time, as well as memory index jumping, which reduces the number of input clock cycles. 

Chips are available in a small-outline, 8-pin package.