SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
1986, Texas Instruments Incorporated
1
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
OC
PRE
C
D
Q
L
L
X
X
L
L
H
H
H
L
L
H
H
L
H
L
H
L
X
Q0
H
X
X
X
Z
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1PRE
1OC
1D1
1D2
1D3
1D4
2D1
2D2
2D3
2D4
2OC
GND
V
CC
1C
1Q1
1Q2
1Q3
1Q4
2Q1
2Q2
2Q3
2Q4
2C
2PRE
SN54ALS880A, SN54AS880 . . . JT PACKAGE
SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE
(TOP VIEW)
3 2 1
13 14
5
6
7
8
9
10
11
1Q2
1Q3
1Q4
NC
2Q1
2Q2
2Q3
1D2
1D3
1D4
NC
2D1
2D2
2D3
4
15 16 17 18
2OC
GND
NC
2PRE
2C
2Q4
1D1
1OC
1PRE
NC
SN54ALS880A, SN54AS880 . . . JT PACKAGE
SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE
(TOP VIEW)
28 27 26
25
24
23
22
21
20
19
12
2D4
1C
1Q1
CC
V
NC No internal connection
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.
SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
2
logic symbol
1OC
2
23
EN
C1
1
1PRE
3
1D1
4
1D2
5
1D3
6
1D4
2OC
11
2C
14
2PRE
13
2D1
7
2D2
8
2D3
9
2D4
10
1C
S
1D
EN
C1
S
1D
1Q1
22
21
1Q2
20
1Q3
19
1Q4
18
2Q1
17
2Q2
16
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)
D4
D3
D2
D1
PRE
C
OC
Q4
Q3
Q2
Q1
1D
C1
S
S
C1
1D
S
C1
1D
S
C1
1D
SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
3
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
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
SN54ALS880A
SN74ALS880A
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.7
0.8
V
IOH
High-level output current
1
2.6
mA
IOL
Low-level output current
12
24
mA
t
Pulse duration
PRE low
15
15
ns
tw
Pulse duration
C high
15
15
tsu
Setup time, data before C
10
10
ns
th
Hold time, data after C
10
10
ns
TA
Operating free-air temperature
55
125
0
70
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS880A
SN74ALS880A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
V
VCC = 4.5 V to 5.5 V,
IOH = 0.4 mA
VCC 2
VCC 2
VOH
VCC = 4.5 V,
IOH = 1 mA
2.4
3.3
V
VCC = 4.5 V,
IOH = 2.6 mA
2.4
3.2
VOL
VCC = 4.5 V,
IOL = 12 mA
0.25
0.4
0.25
0.4
V
VOL
VCC = 4.5 V,
IOL = 24 mA
0.35
0.5
V
IOZH
VCC = 5.5 V,
VO = 2.7 V
20
20
A
IOZL
VCC = 5.5 V,
VO = 0.4 V
20
20
A
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20
A
IIL
VCC = 5.5 V,
VI = 0.4 V
0.2
0.2
mA
IO
VCC = 5.5 V,
VO = 2.25 V
30
112
30
112
mA
Outputs high
14
21
14
21
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.
SN54ALS880A, SN74ALS880A
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
4
switching characteristics (see Note 1)
VCC = 5 V,
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
CL = 50 pF,
R1 = 500
,
R1 = 500
,
PARAMETER
FROM
TO
R2 = 500
,
R2 = 500
,
UNIT
PARAMETER
(INPUT)
(OUTPUT)
TA = 25
C
TA = MIN to MAX
UNIT
'ALS880A
SN54ALS880A
SN74ALS880A
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
D
Q
14
19
3
23
3
20
ns
tPHL
D
Q
9
12
3
15
3
14
ns
tPLH
C
Q
17
22
8
31
8
24
ns
tPHL
C
Q
14
18
8
22
8
21
ns
tPHL
PRE
Q
12
16
6
24
6
21
ns
tPZH
OC
Q
12
15
4
21
4
18
ns
tPZL
OC
Q
13
17
4
21
4
18
ns
tPHZ
OC
Q
6
9
2
12
2
10
ns
tPLZ
OC
Q
8
11
3
21
3
17
ns
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
SN54AS880, SN74AS880
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
5
recommended operating conditions
SN54AS880
SN74AS880
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
IOH
High-level output current
12
15
mA
IOL
Low-level output current
32
48
mA
t
Pulse duration
PRE low
4.5
3.5
ns
tw
Pulse duration
C high
4
2.5
ns
tsu
Setup time, data before C
2
2
ns
th
Hold time, data after C
1
1
ns
TA
Operating free-air temperature
55
125
0
70
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS880
SN74AS880
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
V
VCC = 4.5 V to 5.5 V,
IOH = 2 mA
VCC 2
VCC 2
VOH
VCC = 4.5 V,
IOH = 12 mA
2.4
3.2
V
VCC = 4.5 V,
IOH = 15 mA
2.4
3.3
VOL
VCC = 4.5 V,
IOL = 32 mA
0.30
0.5
V
VOL
VCC = 4.5 V,
IOL = 48 mA
0.35
0.5
V
IOZH
VCC = 5.5 V,
VO = 2.7 V
50
50
A
IOZL
VCC = 5.5 V,
VO = 0.4 V
50
50
A
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20
A
IIL
VCC = 5.5 V,
VI = 0.4 V
0.5
0.5
mA
IO
VCC = 5.5 V,
VO = 2.25 V
30
112
30
112
mA
Outputs high
73
118
73
118
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.
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