6-1

March 1997

HM-6642

512 x 8 CMOS PROM

Features

• Low Power Standby and Operating Power

- ICCSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

µA

- ICCOP . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA at 1MHz

• Fast Access Time. . . . . . . . . . . . . . . . . . . . . . 120/200ns

• Industry Standard Pinout

• Single 5.0V Supply

• CMOS/TTL Compatible Inputs

• Field Programmable

• Synchronous Operation

• On-Chip Address Latches

• Separate Output Enable

Description

The HM-6642 is a 512 x 8 CMOS NiCr fusible link

Programmable Read Only Memory in the popular 24 pin,

byte wide pinout. Synchronous circuit design techniques

combine with CMOS processing to give this device high

speed performance with very low power dissipation.

On-chip address latches are provided, allowing easy

interfacing with recent generation microprocessors that use

multiplexed address/data bus structures, such as the 8085.

The output enable controls, both active low and active high,

further

simplify

microprocessor

system

interfacing

by

allowing output data bus control independent of the chip

enable control. The data output latches allow the use of the

HM-6642 in high speed pipelined architecture systems, and

also in synchronous logic replacement functions.

Applications for the HM-6642 CMOS PROM include low

power handheld microprocessor based instrumentation and

communications systems, remote data acquisition and

processing systems, processor control store, and synchro-

nous logic replacement.

All bits are manufactured storing a logical “0” and can be

selectively programmed for a logical “1” at any bit location.

Ordering Information

PACKAGE

TEMPERATURE RANGE

120ns

200ns

PKG. NO.

SBDIP

HM1-6642B-9

HM1-6642-9

D24.6

SMD#

5962-8869002JA

5962-8869001JA

D24.6

SLIM SBDIP

HM6-6642B-9

HM6-6642-9

D24.3

SMD#

5962-8869002LA

5962-8869001LA

D24.3

CLCC

-

HM4-6642-9

J28.A

SMD#

5962-88690023A

5962-88690013A

J28.A

File Number

3012.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207