TEXAS INSTRUMENTS TMS27C040 524288 BY 8-BIT UV ERASABLE TMS27PC040 524288 BY 8-BIT PROGRAMMABLE READ-ONLY MEMORY handbook

Brand: Texas Instruments
Category: Memory
Document type: Datasheet
Language: English
Pages: 12
File format: PDF
File size: 164 KB
Published: 01 August, 2012
Updated: 29 September, 2023
Models: TMS27C040, TMS27PC040
MD5 checksum: C066D2F908ADA5F4B1752D60580C35C7
PDF: TEXAS INSTRUMENTS TMS27C040 524288 BY 8-BIT UV ERASABLE TMS27PC040 524288 BY 8-BIT PROGRAMMABLE READ-ONLY MEMORY handbook PDF

About this manual

This document is a technical datasheet for the TMS27C040 (UV erasable) and TMS27PC040 (one-time programmable) 524,288-by-8-bit Programmable Read-Only Memories (PROMs). These devices are fabricated using CMOS technology and operate from a single 5-V supply in read mode.

What's inside

Description
Operation Modes
Erasure and Initializing
Programming Algorithm
Pin Nomenclature
Absolute Maximum Ratings

Specifications

Memory Capacity	524,288 by 8 bits (4194304-bit)
Technology	CMOS
Operating Voltage (Read)	5 V
Programming Voltage (Vpp)	13 V

Frequently asked questions

What is the signature code for the TMS27C040?

The manufacturer's code is 97 (Hex) and the device code is 50 (Hex).

Can the TMS27PC040 be erased after programming?

No, logic lows programmed into an OTP PROM cannot be erased.

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