SN54AC373, SN74AC373

OCTAL DTYPE TRANSPARENT LATCHES

WITH 3STATE OUTPUTS

SCAS540D − OCTOBER 1995 − REVISED OCTOBER 2003

1

POST OFFICE BOX 655303

Lines Directly

description/ordering information

These 8-bit latches feature 3-state outputs

designed specifically for driving highly capacitive

or relatively low-impedance loads. The devices

are particularly suitable for implementing buffer

registers, I/O ports, bidirectional bus drivers, and

working registers.

The eight latches are D-type transparent latches.

When the latch-enable (LE) input is high, the Q

outputs follow the data (D) inputs. When LE is

taken low, the Q outputs are latched at the logic

levels set up at the D inputs.

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 in bus-organized systems without need for

interface or pullup components.

OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered

while the outputs are in the high-impedance state.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N

Tube

SN74AC373N

SN74AC373N

SOIC − DW

Tube

SN74AC373DW

AC373

SOIC − DW

Tape and reel

SN74AC373DWR

AC373

−40

°C to 85°C

SOP − NS

Tape and reel

SN74AC373NSR

AC373

−40 C to 85 C

SSOP − DB

Tape and reel

SN74AC373DBR

AC373

TSSOP − PW

Tube

SN74AC373PW

AC373

TSSOP − PW

Tape and reel

SN74AC373PWR

AC373

CDIP − J

Tube

SNJ54AC373J

SNJ54AC373J

−55

°C to 125°C

CFP − W

Tube

SNJ54AC373W

SNJ54AC373W

−55 C to 125 C

LCCC − FK

Tube

SNJ54AC373FK

SNJ54AC373FK

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

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

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.

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.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

OE

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

8Q

8D

7D

7Q

6Q

6D

5D

5Q

LE

3

2

1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

8D

7D

7Q

6Q

6D

2D

2Q

3Q

3D

4D

SN54AC373 . . . FK PACKAGE

(TOP VIEW)

SN54AC373 ...J OR W PACKAGE

SN74AC373 . . . DB, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

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.