SN74ALS880ANT Datasheet, PDF (1/7 Pages) Texas Instruments – DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS

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SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
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SDAS079A − D2661, DECEMBER 1982 − REVISED MAY 1986
• 3-State Buffer-Type Outputs Drive Bus
Lines Directly
• Bus-Structured Pinout
• ’ALS873B is Alternative Version With
Noninverting Outputs
• Package Options Include Plastic Small
Outline Packages, Both Plastic and
Ceramic Chip Carriers, and Standard
Plastic and Ceramic 300-mil DIPs
• Dependable Texas Instruments Quality and
Reliability
description
These dual 4-bit registers feature 3-state outputs
designed specifically for bus driving. This makes
these devices particularly suitable for implement-
ing buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
The dual 4-bit latches are transparent D-type.
When the latch enable input (1C or 2C) is high, the
Q outputs will follow the data (D) inputs in inverted
form, according to the function table. When the
latch enable input is taken low, the outputs will be
latched. When PRE goes low, the Q outputs go low
independently of the clock. The outputs are in a
high-impedance state when OC (output control) is
at a high logic level.
The SN54ALS880A and SN54AS880 are charac-
terized for operation over the full military
temperature range of − 55°C to 125°C. The
SN74ALS880A and SN74AS880 are character-
ized for operation from 0°C to 70°C.
FUNCTION TABLE
(each latch)
INPUTS
OUTPUT
SN54ALS880A, SN54AS880 . . . JT PACKAGE
SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE
(TOP VIEW)
1PRE 1
1OC 2
1D1 3
1D2 4
1D3 5
1D4 6
2D1 7
2D2 ⁸
2D3 ⁹
2D4 ¹⁰
2OC ¹¹
GND ¹²
24 V_CC
23 1C
22 1Q1
21 1Q2
20 1Q3
19 1Q4
18 2Q1
17 _2Q2
16 _2Q3
15 _2Q4
14 _2C
13 _2PRE
SN54ALS880A, SN54AS880 . . . JT PACKAGE
SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
1D2 5
25 1Q2
1D3 6
24 1Q3
1D4 7
23 1Q4
NC 8
22 NC
2D1 9
21 2Q1
2D2 10
20 2Q2
2D3 11
19 2Q3
12 13 14 15 16 17 18
NC − No internal connection
OC
PRE
C
D
Q
L
L
X
X
L
L
H
H
H
L
L
H
H
L
H
L
H
H
X
L
X
Q0
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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• POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
Copyright  1986, Texas Instruments Incorporated
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