mm74c89 Fairchild Semiconductor, mm74c89 Datasheet

mm74c89

Manufacturer Part Number

mm74c89

Description

64-bit 3-state Random Access Read/write Memory

Manufacturer

Fairchild Semiconductor

Datasheet

1.MM74C89.pdf (6 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

mm74c89N

Manufacturer:

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

mm74c89N

Manufacturer:

FAIRCHIKD

Quantity:

20 000

Company:

H&T Electronics

Part Number:

mm74c89N

Quantity:

1 404

Current page: 1 of 6
Download datasheet (73Kb)

Order Number

MM74C89N

MM74C89

64-Bit 3-STATE Random Access Read/Write Memory

General Description

The MM74C89 is a 16-word by 4-bit random access read/

write memory. Inputs to the memory consist of four address

lines, four data input lines, a write enable line and a mem-

ory enable line. The four binary address inputs are

decoded internally to select each of the 16 possible word

locations. An internal address register latches the address

information on the positive to negative transition of the

memory enable input. The four 3-STATE data output lines

working in conjunction with the memory enable input pro-

vide for easy memory expansion.

Address Operation: Address inputs must be stable t

prior to the positive to negative transition of memory

enable. It is thus not necessary to hold address information

stable for more than t

tive to negative transition of memory enable).

Write Operation: Information present at the data inputs is

written into the memory at the selected address by bringing

write enable and memory enable LOW.

Ordering Code:

Connection Diagram

Pin Assignments for DIP

Package Number Package Description

after the memory is enabled (posi-

Top View

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

DS005888.prf

Read Operation: The complement of the information

which was written into the memory is non-destructively

read out at the four outputs. This is accomplished by

selecting the desired address and bringing memory enable

LOW and write enable HIGH.

When the device is writing or disabled the output assumes

a 3-STATE (Hi-z) condition.

Features

Note: The timing is different than the DM7489 in that a positive to negative

transition of the memory enable must occur for the memory to be selected.

Truth Table

ME WE

Wide supply voltage range:

Guaranteed noise margin: 1.0V

High noise immunity: 0.45 V

Low power TTL compatibility:

Low power consumption: 100 nW/package (typ.)

Fast access time: 130 ns (typ.) at V

3-STATE output

fan out of 2 driving 74L

Write

Read

Inhibit, Storage 3-STATE

Operation

3-STATE

Complement of Selected Word

October 1987

Revised January 1999

Condition of Outputs

3.0V to 15V

(typ.)

www.fairchildsemi.com

10V

Related parts for mm74c89

mm74c89 Summary of contents

Page 1

... MM74C89 64-Bit 3-STATE Random Access Read/Write Memory General Description The MM74C89 is a 16-word by 4-bit random access read/ write memory. Inputs to the memory consist of four address lines, four data input lines, a write enable line and a mem- ory enable line. The four binary address inputs are decoded internally to select each of the 16 possible word locations ...

Page 2

Logic Diagram www.fairchildsemi.com 2 ...

Page 3

Absolute Maximum Ratings Voltage at any Pin 0. Operating Temperature Range Storage Temperature Range ( Power Dissipation ( Dual-In-Line Small Outline Operating V Range CC DC Electrical Characteristics Min/Max limits apply across temperature range, ...

Page 4

AC Electrical Characteristics pF, unless otherwise noted A L Symbol Parameter t Propagation Delay from pd Memory Enable t Access Time from ACC Address Input t Address Setup Time SA t Address Hold Time HA ...

Page 5

AC Test Circuits t 0H Switching Time Waveforms t 0H Read Cycle Write Cycle Read Modify Write Cycle www.fairchildsemi.com ...

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL ...

Related keywords

mm74c89 datasheet
mm74c89 data sheet
mm74c89 pdf datasheet
mm74c89 component
mm74c89 part
mm74c89 distributor
mm74c89 RoHS
mm74c89 datasheet download