SN54ALS373A, SN54AS373, SN74ALS373A, SN74AS373

OCTAL TRANSPARENT D-TYPE LATCHES

WITH 3-STATE OUTPUTS

SDAS083C – APRIL 1982 – REVISED MARCH 2002

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POST OFFICE BOX 655303

Lines

description

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 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) or a high-impedance state. In

the high-impedance state, the outputs neither

load nor drive the bus lines significantly. The

high-impedance state and the increased drive

provide the capability to drive bus lines without

interface or pullup components.

OE does not affect internal operations of the

latches. Old data can be retained or new data can

be entered while the outputs are off.

Copyright

 2002, 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.

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OE

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

8Q

8D

7D

7Q

6Q

6D

5D

5Q

LE

SN54ALS373A, ...J OR W PACKAGE

SN54AS373 ...J PACKAGE

SN74ALS373A, SN74AS373 ...DW, N, OR NS PACKAGE

(TOP VIEW)

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910 11 12 13

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8D

7D

7Q

6Q

6D

2D

2Q

3Q

3D

4D

SN54ALS373A, SN54AS373 . . . FK PACKAGE

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On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.