This part is a kind of semiconductor called 28C16.

Function of this product has 16K 2K x 8 PARALLEL EEPROM with SOFTWARE DATA PROTECTION.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

M28C16 16K (2K x 8) PARALLEL EEPROM with SOFTWARE DATA PROTECTION NOT FOR NEW DESIGN FAST ACCESS TIME: 90ns SINGLE 5V ± 10% SUPPLY VOLTAGE LOW POWER CONSUMPTION FAST WRITE CYCLE: – 64 Bytes Page Write Operation – Byte or Page Write Cycle: 3ms Max ENHANCED END OF WRITE DETECTION: – Data Polling – Toggle Bit PAGE LOAD TIMER STATUS BIT HIGH RELIABILITY SINGLE POLYSILICON, CMOS TECHNOLOGY: – Endurance >100,000 Erase/Write Cycles – Data Retention >40 Years JEDEC APPROVED BYTEWIDE PIN OUT SOFTWARE DATA PROTECTION M28C16 is replaced by the products described on the document M28C16A DESCRIPTION The M28C16 is a 2K x 8 low power Parallel EEPROM fabricatedwith SGS-THOMSON proprietary single polysilicon CMOS technology. The device offers fast access time with low power dissipation and re [ ... ]

28C16 PDF Datasheet Download