54AC16373, 74AC16373

16-BIT TRANSPARENT D-TYPE LATCHES

WITH 3-STATE OUTPUTS

SCAS121B – MARCH 1990 – REVISED APRIL 1996

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POST OFFICE BOX 655303

Widebus

™ Family

PCB Layout

Minimizes High-Speed Switching Noise

CMOS) 1-

µm Process

125

°C

Shrink Small-Outline (DL) Packages Using

25-mil Center-to-Center Pin Spacings and

380-mil Fine-Pitch Ceramic Flat (WD)

Packages Using 25-mil Center-to-Center

Pin Spacings

description

The ’AC16373 are 16-bit transparent D-type

latches with 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. The device can be used as two 8-bit

latches or one 16-bit latch. 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 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 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 need for interface or pullup components. OE does not affect internal operations of the latch. Old

data can be retained or new data can be entered while the outputs are in the high-impedance state.

The 74AC16373 is packaged in TI’s shrink small-outline package (DL), which provides twice the I/O pin count

and functionality of standard small-outline packages in the same printed-circuit-board area.

The 54AC16373 is characterized for operation over the full military temperature range of –55

°C to 125°C. The

74AC16373 is characterized for operation from –40

°C to 85°C.

Copyright

© 1996, Texas Instruments Incorporated

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information 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.

EPIC and Widebus are trademarks of Texas Instruments Incorporated.

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1OE

1Q1

1Q2

GND

1Q3

1Q4

1Q5

1Q6

GND

1Q7

1Q8

2Q1

2Q2

GND

2Q3

2Q4

2Q5

2Q6

GND

2Q7

2Q8

2OE

1LE

1D1

1D2

GND

1D3

1D4

1D5

1D6

GND

1D7

1D8

2D1

2D2

GND

2D3

2D4

2D5

2D6

GND

2D7

2D8

2LE

54AC16373 . . . WD PACKAGE

74AC16373 . . . DL PACKAGE

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