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SNx4HC573A Octal Transparent D-Type Latches With 3-State Outputs

1 Features

•Wide Operating Voltage Range from 2 V to 6 V

•High-Current 3-State Outputs Drive Bus Lines

Directly up to 15 LSTTL Loads

•Low Power Consumption: 80-µA Maximum ICC

•Typical tpd = 21 ns

•±6-mA Output Drive at 5 V

•Low Input Current: 1 µA (Maximum)

•Bus-Structured Pinout

2 Applications

•Buffer Registers

•Bidirectional Bus Drivers

•Working Registers

3 Description

The SNx4HC573A devices are octal transparent

D-type latches that feature 3-state outputs designed

specifically for driving highly capacitive or relatively

low-impedance loads. They are particularly suitable

for implementing buffer registers, I/O ports,

bidirectional bus drivers, and working registers.

While the latch-enable (LE) input is high, the

Q outputs respond to the data (D) inputs. When LE is

low, the outputs are latched to retain the data that was

set up.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

SN54HC573AJCDIP (20)26.92 mm × 6.92 mm

SN54HC573AWCFP (20)13.72 mm × 6.92 mm

SN54HC573AFKLCCC (20)8.89 mm × 8.89 mm

SN74HC573ANPDIP (20)25.40 mm × 6.35 mm

SN74HC573ADWSOIC (20)12.80 mm × 7.50 mm

SN74HC573ADBSSOP (20)7.20 mm × 5.30 mm

SN74HC573APWTSSOP (20)5.00 mm × 4.40 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

OE

LE

1D

1Q

1

11

2

19

To Seven Other Channels

C1

1D

Copyright © 2016, Texas Instruments Incorporated

Logic Diagram (Positive Logic)

SN54HC573A, SN74HC573A

SCLS147G – DECEMBER 1982 – REVISED APRIL 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspecifikationer