This part is a kind of semiconductor called 28C16A.

Function of this product has 16K (2K x 8) CMOS EEPROM.

Manufacturers : Microchip Technology

Image and pinout :

Some of the text within the PDF file :

28C16A 16K (2K x 8) CMOS EEPROM FEATURES • Fast Read Access Time150 ns • CMOS Technology for Low Power Dissipation - 30 mA Active - 100 µA Standby • Fast Byte Write Time200 µs or 1 ms • Data Retention >200 years • High Endurance - Minimum 104 Erase/Write Cycles • Automatic Write Operation - Internal Control Timer - Auto-Clear Before Write Operation - On-Chip Address and Data Latches • Data polling • Chip Clear Operation • Enhanced Data Protection - VCC Detector - Pulse Filter - Write Inhibit • Electronic Signature for Device Identification • 5-Volt-Only Operation • Organized 2Kx8 JEDEC Standard Pinout • 24-pin Dual-In-Line Package • 32-pin PLCC Package • 28-pin Thin Small Outline Package (TSOP) 8x20mm • 28-pin Very Small Outline Package (VSOP) 8x13. [ ... ]

28C16A PDF Datasheet Download