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ą SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
ą
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
1OC
1D1
1D2
1D3
1D4
2D1
2D2
2D3
2D4
2OC
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
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
LL
XXL
LH
HHL
LH
HLH
LH
HX
L X Q0
XXZ
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
Copyright 1986, Texas Instruments Incorporated
1

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SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
ąą
SDAS079A − D2661, DECEMBER 1982 − REVISED MAY 1986
logic symbol
1OC 2
1C
1PRE
23
1
1D1
1D2
1D3
3
4
5
1D4 6
EN
C1
S
1D
22
21
20
1Q1
1Q2
1Q3
19 1Q4
2OC 11
2C
2PRE
14
13
2D1
2D2
2D3
7
8
9
2D4 10
EN
C1
S
1D
18
17
16
2Q1
2Q2
2Q3
15 2Q4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for DW, JT, and NT packages.
logic diagram (each quad latch, positive logic)
OC
C
PRE
D1
S
C1
1D
S
C1
D2 1D
S
C1
D3 1D
Q1
Q2
Q3
S
C1
D4 1D Q4
ą
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001

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ą SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
ą
SDAS079A − D2661, DECEMBER 1982 − REVISED MAY 1986
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range: SN54ALS880A, SN54AS880 . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74ALS880A, SN74AS880 . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
recommended operating conditions
VCC
VIH
VIL
IOH
IOL
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
tw Pulse duration
tsu Setup time, data before C
th Hold time, data after C
TA Operating free-air temperature
PRE low
C high
SN54ALS880A
MIN NOM MAX
4.5 5 5.5
2
0.7
−1
12
15
15
10
10
−55 125
SN74ALS880A
MIN NOM MAX
4.5 5 5.5
2
0.8
− 2.6
24
15
15
10
10
0 70
UNIT
V
V
V
mA
mA
ns
ns
ns
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS880A
MIN TYPMAX
SN74ALS880A
MIN TYPMAX UNIT
VIK
VOH
VOL
IOZH
IOZL
II
IIH
IIL
IO‡
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
II = − 18 mA
IOH = − 0.4 mA
IOH = − 1 mA
IOH = − 2.6 mA
IOL = 12 mA
IOL = 24 mA
VO = 2.7 V
VO = 0.4 V
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 2.25 V
Outputs high
− 1.2
− 1.2
VCC −2
2.4
3.3
VCC −2
2.4 3.2
0.25 0.4
0.25 0.4
0.35 0.5
20 20
−20 −20
0.1 0.1
20 20
− 0.2
− 0.2
− 30
− 112
− 30
− 112
14 21
14 21
V
V
V
µA
µA
mA
µA
mA
mA
ICC
VCC = 5.5 V
Outputs low
19 29
19 29 mA
Outputs disabled
20 31
20 31
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
3

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SN54ALS880A, SN74ALS880A
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
ąą
SDAS079A − D2661, DECEMBER 1982 − REVISED MAY 1986
ą
switching characteristics (see Note 1)
VCC = 5 V,
CL = 50 pF,
R1 = 500 ,
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
R2 = 500 ,
TA = 25°C
’ALS880A
MIN TYP MAX
tPLH
tPHL
D
Q
tPLH
tPHL
C
Q
tPHL
PRE
Q
tPZH
tPZL
OC
Q
tPHZ
tPLZ
OC
Q
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
14 19
9 12
17 22
14 18
12 16
12 15
13 17
69
8 11
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 ,
R2 = 500 ,
TA = MIN to MAX
SN54ALS880A SN74ALS880A
MIN MAX MIN MAX
3 23
3 20
3 15
3 14
8 31
8 24
8 22
8 21
6 24
6 21
4 21
4 18
4 21
4 18
2 12
2 10
3 21
3 17
UNIT
ns
ns
ns
ns
ns
4 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001

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ą SN54AS880, SN74AS880
DUAL 4ĆBIT DĆTYPE LATCHES WITH 3ĆSTATE OUTPUTS
ą
SDAS079A − D2661, DECEMBER 1982 − REVISED MAY 1986
recommended operating conditions
VCC
VIH
VIL
IOH
IOL
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
tw Pulse duration
tsu Setup time, data before C
th Hold time, data after C
TA Operating free-air temperature
PRE low
C high
SN54AS880
MIN NOM MAX
4.5 5 5.5
2
0.8
− 12
32
4.5
4
2
1
−55 125
SN74AS880
MIN NOM MAX
4.5 5 5.5
2
0.8
− 15
48
3.5
2.5
2
1
0 70
UNIT
V
V
V
mA
mA
ns
ns
ns
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS880
MIN TYPMAX
SN74AS880
MIN TYPMAX UNIT
VIK
VOH
VOL
IOZH
IOZL
II
IIH
IIL
IO‡
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
II = − 18 mA
IOH = − 2 mA
IOH = − 12 mA
IOH = − 15 mA
IOL = 32 mA
IOL = 48 mA
VO = 2.7 V
VO = 0.4 V
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 2.25 V
Outputs high
− 1.2
− 1.2
VCC −2
2.4
3.2
VCC −2
2.4 3.3
0.30 0.5
0.35 0.5
50 50
−50 −50
0.1 0.1
20 20
− 0.5
− 0.5
− 30
− 112
− 30
− 112
73 118
73 118
V
V
V
µA
µA
mA
µA
mA
mA
ICC
VCC = 5.5 V
Outputs low
76 122
76 122 mA
Outputs disabled
86 137
86 137
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
5