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NMC27C64 Rev. C

NMC27C64

65,536-Bit (8192 x 8) CMOS EPROM

General Description

The NMC27C64 is a 64K UV erasable, electrically reprogrammable

and one-time programmable (OTP) CMOS EPROM ideally suited

for applications where fast turnaround, pattern experimentation

and low power consumption are important requirements.

The NMC27C64 is designed to operate with a single +5V power

supply with

±10% tolerance. The CMOS design allows the part to

operate over extended and military temperature ranges.

The NMC27C64Q is packaged in a 28-pin dual-in-line package

with a quartz window. The quartz window allows the user to

expose the chip to ultraviolet light to erase the bit pattern. A new

pattern can then be written electrically into the device by following

the programming procedure.

The NMC27C64N is packaged in a 28-pin dual-in-line plastic

molded package without a transparent lid. This part is ideally

Block Diagram

January 1999

suited for high volume production applications where cost is an

important factor and programming only needs to be done once.

This family of EPROMs are fabricated with Fairchild’s proprietary,

time proven CMOS double-poly silicon gate technology which

combines high performance and high density with low power

consumption and excellent reliability.

Features

s High performance CMOS

— 150 ns access time

s JEDEC standard pin configuration

— 28-pin Plastic DIP package

— 28-pin CERDIP package

s Drop-in replacement for 27C64 or 2764

s Manufacturers identification code

DS008634-1

Output Enable,

Chip Enable, and

Program Logic

Y Decoder

X Decoder

Output

Buffers

65,536-Bit

Cell Matrix

Data Outputs O0 - O7

VCC

GND

VPP

OE

PGM

CE

A0 - A12

Address

Inputs

© 1998 Fairchild Semiconductor Corporation