The Turbo IC 28C256A is a 32K X 8 EEPROM fabricated with Turbo's proprietary, high reliability, high performance CMOS technology. The 256K bits of memory are organized as 32K by 8 bits. The device offers access time of 120 ns with power dissipation below 250 mW. The 28C256A has a 64-bytes page write operation, enabling the entire memory to be typically written in less than 5.0 seconds. During a write cycle, the address and 1 to 64 bytes of data are internally latched, freeing the address and data bus for other microprocessor operations. The programming process is automatically controlled by the device using an internal control timer. Data polling on one or all I/O can be used to detect the end of a programming cycle. In addition, the 28C256A includes an user-optional software data write mode offering additional protection against unwanted (false) write. The device utilizes an error protected self redundant cell for extended data retention and endurance.