DM74ALS373SJX View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

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DM74ALS373SJX

Octal D-Type 3-STATE Transparent Latch

Fairchild Semiconductor 

April 1984

Revised February 2000

DM74ALS373

Octal D-Type 3-STATE Transparent Latch

General Description

These 8-bit registers feature totem-pole 3-STATE outputs

designed specifically for driving highly-capacitive or rela-

tively low-impedance loads. The high-impedance state and

increased high-logic-level drive provide these registers with

the capability of being connected directly to and driving the

bus lines in a bus-organized system without need for inter-

face or pull-up components. They are particularly attractive

for implementing buffer registers, I/O ports, bidirectional

bus drivers, and working registers.

The eight latches of the DM74ALS373 are transparent D-

type latches. While the enable (G) is HIGH the Q outputs

will follow the data (D) inputs. When the enable is taken

LOW the output will be latched at the level of the data that

was set up.

A buffered output control input can be used to place the

eight outputs in either a normal logic state (HIGH or LOW

logic levels) or a high-impedance state. In the high-imped-

ance state the outputs neither load nor drive the bus lines

significantly.

The output control does not affect the internal operation of

the latches. That is, the old data can be retained or new

data can be entered even while the outputs are OFF.

Features

s Switching specifications at 50 pF

s Switching specifications guaranteed over full tempera-

ture and VCC range

s Advanced oxide-isolated, ion-implanted Schottky TTL

process

s Functionally and pin for pin compatible with LS TTL

counterpart

s Improved AC performance over DM74LS373 at approxi-

mately half the power

s 3-STATE buffer-type outputs drive bus lines directly

Ordering Code:

Order Number Package Number

Package Description

DM74ALS373WM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

DM74ALS373SJ

M20D

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

DM74ALS373N

N20A

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

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

© 2000 Fairchild Semiconductor Corporation DS006220

www.fairchildsemi.com

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