This document is a datasheet for the STMicroelectronics M27V322, a 32K x 8 bit UV erasable programmable read-only memory (EPROM). Here's a summary of the key information:

Key Features & Specifications:

️· Memory Size: 32K x 8 bits (256 Kbits)
️· Organization: Byte-addressable
️· Access Time: 55ns (fast access versions available)
️· Supply Voltage: 5V ± 5%
️· EPROM Type: UV Erasable Programmable Read-Only Memory
️· Programming: Requires a standard EPROM programmer.
️· Erase: UV light exposure is needed to erase the memory contents.
️· Operating Temperature: 0°C to 70°C (and -40°C to 85°C versions available).

Key Sections in the Datasheet:

️· Electrical Characteristics: Detailed specs for supply voltage, input/output conditions, timing, etc.
️· AC Characteristics: Specifies read and write timings.
️· Pin Descriptions: Explains the function of each pin.
️· Device Operation: Describes how the memory functions.
️· Programming Conditions: Information on the programming process.

️· Erase Procedure: Details on how to erase the memory using UV light.
️· Package Information: Includes mechanical dimensions and outlines for several package types (FDIP42, PDIP42).
️· Ordering Information: Helps identify specific speed and temperature range versions.
️· Revision History: Tracks changes to the datasheet.

Important Notes:

️· UV Erasure: The memory can be erased by exposure to UV light.
️· Programming Required: The EPROM needs to be programmed using a dedicated programmer before it can be used.
️· Multiple Packages: The device comes in various package options, as shown in the mechanical data sections.



This datasheet provides a comprehensive guide to the M27V322 EPROM, including its electrical characteristics, operating procedures, and physical specifications.