The SST38VF6401-90-5I-EKE is a Flash memory chip from Microchip, with a total capacity of 64M (4Mx16). It has a 90ns access time and is rated to operate at a voltage range of 2.7-3.6V. It is designed for industrial use, meaning that it is capable of operating in extreme temperatures and environments. The SST38VF6401-90-5I-EKE is able to store up to 4Mx16 bits of data, such as program code, firmware and digital data.