DESCRIPTION
This specification covers a range of 2K bit serial EEPROM products, the ST93C56, 56C specified at 5V ± 10% and the ST93C57C specified at 3V to 5.5V. In the text, products are referred to as ST93C56.
The ST93C56 is a 2K bit Electrically Erasable ProgrammableMemory(EEPROM) fabricatedwith SGS-THOMSON’s High EnduranceSingle Polysilicon CMOS technology. The memory is accessed through a serial input (D) and output (Q). The 2K bit memory is divided into either 256 x 8 bit bytes or 128 x 16 bit words. The organization may be selected by a signal applied on the ORG input.

■ 1 MILLION ERASE/WRITE CYCLES, with 40 YEARS DATA RETENTION
■ DUAL ORGANIZATION: 128 x 16 or 256 x 8
■ BYTE/WORD and ENTIRE MEMORY PROGRAMMING INSTRUCTIONS
■ SELF-TIMED PROGRAMMING CYCLE with AUTO-ERASE
■ READY/BUSY SIGNAL DURING PROGRAMMING
■ SINGLE SUPPLY VOLTAGE:
   – 4.5V to 5.5V for ST93C56 version
   – 3V to 5.5V for ST93C57 version
■ SEQUENTIAL READ OPERATION
■ 5ms TYPICAL PROGRAMMING TIME
■ ST93C56, ST93C56C, ST93C57C are replaced by the M93C56