This part is a kind of semiconductor called 28C16B.

Function of this product has M28C16B.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

M28C16B M28C17B 16 Kbit (2K x 8) Parallel EEPROM With Software Data Protection PRELIMINARY DATA s s Fast Access Time: 90 ns at VCC=5V Single Supply Voltage: – 4.5 V to 5.5 V for M28CxxB – 2.7 V to 3.6 V for M28CxxB-W s s Low Power Consumption Fast BYTE and PAGE WRITE (up to 64 Bytes) – 3 ms at VCC=4.5 V – 5 ms at VCC=2.7 V s Enhanced Write Detection and Monitoring: – Data Polling – Toggle Bit – Page Load Timer Status PLCC32 (K) s s s s JEDEC Approved Bytewide Pin-Out Software Data Protection 100000 Erase/Write Cycles (minimum) Data Retention (minimum): 40 Years DESCRIPTION The M28C16B and M28C17B devices consist of 2048x8 bits of low power, parallel EEPROM, fabricated with STMicroelectronics’ proprietary single polysilicon CMOS technology. The d [ ... ]

28C16B PDF Datasheet Download