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SN74ALS873BDW Datasheet(PDF) 1 Page - Texas Instruments

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Part No. SN74ALS873BDW
Description  DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS873B, SN54AS873A . . . JT PACKAGE
SN74ALS873B, SN74AS873A . . . DW OR NT PACKAGE
(TOP VIEW)
SN54ALS873B, SN54AS873A . . . FK PACKAGE
(TOP VIEW)
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24
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1CLR
1OE
1D1
1D2
1D3
1D4
2D1
2D2
2D3
2D4
2OE
GND
VCC
1LE
1Q1
1Q2
1Q3
1Q4
2Q1
2Q2
2Q3
2Q4
2LE
2CLR
NC – No internal connection
32 1 28 27
12 13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
1Q2
1Q3
1Q4
NC
2Q1
2Q2
2Q3
1D2
1D3
1D4
NC
2D1
2D2
2D3
426
14 15 16 17 18
SN54ALS873B, SN54AS873A, SN74ALS873B, SN74AS873A
DUAL 4-BIT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SDAS036D – APRIL 1982 – REVISED AUGUST 1995
Copyright
© 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
3-State Buffer-Type Outputs Drive Bus
Lines Directly
Bus-Structured Pinout
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Plastic (NT) and
Ceramic (JT) DIPs
description
These dual 4-bit D-type latches feature 3-state
outputs designed specifically for bus driving.
These devices are particularly suitable for
implementing
buffer
registers,
I/O
ports,
bidirectional bus drivers, and working registers.
The dual 4-bit latches are transparent D-type
latches. While the latch-enable (LE) input is high,
the Q outputs follow the data (D) inputs in true
form, according to the function table. When LE is
low, the outputs are latched. When the clear (CLR)
input
goes
low,
the
Q
outputs
go
low
independently of LE. The outputs are in the
high-impedance state when the output-enable
(OE) input is at a high logic level.
The
SN54ALS873B
and
SN54AS873A
are
characterized for operation over the full military
temperature range of – 55
°C to 125°C. The
SN74ALS873B
and
SN74AS873A
are
characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
(each latch)
INPUTS
OUTPUT
OE
CLR
LE
D
Q
L
L
X
X
L
L
HH
H
H
L
HH
L
L
L
HL
X
Q0
H
X
X
X
Z
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.




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