SN54HC573A, SN74HC573A

OCTAL TRANSPARENT DTYPE LATCHES

WITH 3STATE OUTPUTS

SCLS147E − DECEMBER 1982 − REVISED SEPTEMBER 2003

1

POST OFFICE BOX 655303

Lines Directly or Up To 15 LSTTL Loads

32 1 20 19

910 11 1213

4

5

6

7

8

18

17

16

15

14

2Q

3Q

4Q

5Q

6Q

3D

4D

5D

6D

7D

SN54HC573A ...FK PACKAGE

(TOP VIEW)

SN54HC573A ...J OR W PACKAGE

SN74HC573A . . . DB, DW, N, OR PW PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

OE

1D

2D

3D

4D

5D

6D

7D

8D

GND

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

LE

description/ordering information

These octal transparent D-type latches 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.

A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high

or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive

the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines

without interface or pullup components.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N

Tube of 25

SN74HC573AN

SN74HC573AN

SOIC − DW

Tube of 40

SN74HC573ADW

HC573A

−40

°C to 85°C

SOIC − DW

Reel of 2500

SN74HC573ADWR

HC573A

−40

°C to 85°C

SSOP − DB

Reel of 2000

SN74HC573ADBR

HC573A

TSSOP − PW

Reel of 2000

SN74HC573APWR

HC573A

TSSOP − PW

Reel of 250

SN74HC573APWT

HC573A

CDIP − J

Tube of 25

SNJ54HC573AJ

SNJ54HC573AJ

−55

°C to 125°C

CFP − W

Tube of 150

SNJ54HC573AW

SNJ54HC573AW

−55 C to 125 C

LCCC − FK

Tube of 55

SNJ54HC573AFK

SNJ54HC573AFK

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design

guidelines are available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

 2003, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

On products compliant to MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.