The SST39SF010A-70-4C-WHE is a 1 Megabit (128K x 8), electrically erasable and programmable read-only memory (EEPROM) device manufactured by Microchip Technology. This device has a Shutdown Mode, allowing the user to place the device in a low-power, low-current standby state. Its 4-Byte Address Bus and 4-Byte Data Bus make it very cost-effective and efficient. The device also features a self-timed programming cycle, an automatic control of program and erase times, a Full-Voltage Programming system with an external programming voltage VPP and fuse bits to protect against code theft, tampering and copying. It has an endurance of 10,000 cycles and is available in 70 ns access time.