This part is a kind of semiconductor called 27C1024.

Function of this product has 1-Megabit 64K x 16 OTP EPROM.

Manufacturers : ATMEL

Image and pinout :

Some of the text within the PDF file :

AT27C1024 Features • Fast Read Access Time - 45 ns • Low Power CMOS Operation • – 100 µA max. Standby – 30 mA max. Active at 5 MHz JEDEC Standard Packages – 40-Lead 600-mil PDIP – 44-Lead PLCC – 40-Lead TSOP (10 mm x 14 mm) Direct Upgrade from 512K (AT27C516) EPROM 5V ± 10% Power Supply High Reliability CMOS Technology – 2000V ESD Protection – 200 mA Latchup Immunity Rapid™ Programming Algorithm - 100 µs/word (typical) CMOS and TTL Compatible Inputs and Outputs Integrated Product Identification Code Commercial and Industrial Temperature Ranges AT27C1024 • • • • • • • 1-Megabit (64K x 16) OTP EPROM AT27C1024 Description The AT27C1024 is a low-power, high-performance 1,048,576 bit one-time programmable read only memory (OTP EPROM) organized 64K by 1 [ ... ]

27C1024 PDF Datasheet Download