This part is a kind of semiconductor called 27C322.

Function of this product has M27C322.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

M27C322 32 Mbit (2Mb x16) UV EPROM and OTP EPROM s 5V ± 10% SUPPLY VOLTAGE in READ OPERATION ACCESS TIME: 80ns WORD-WIDE CONFIGURABLE 32 Mbit MASK ROM REPLACEMENT LOW POWER CONSUMPTION – Active Current 50mA at 5MHz 1 42 42 s s s s – Stand-by Current 100µA s s s 1 PROGRAMMING VOLTAGE: 12V ± 0.25V PROGRAMMING TIME: 50µs/word ELECTRONIC SIGNATURE – Manufacturer Code: 0020h – Device Code: 0034h FDIP42W (F) PDIP42 (P) Figure 1. Logic Diagram DESCRIPTION The M27C322 is a 32 Mbit EPROM offered in the UV range (ultra violet erase). It is ideally suited for microprocessor systems requiring large data or program storage. It is organised as 2 MWords of 16 bit. The pin-out is compatible with a 32 Mbit Mask ROM. The FDIP42W (window ceramic frit-seal package) has a transparent lid w [ ... ]

27C322 PDF Datasheet Download