DM81LS95A • DM81LS96A • DM81LS97A 3-STATE Octal Buffer
September 1991
Revised May 1999
DM81LS95A • DM81LS96A • DM81LS97A
3-STATE Octal Buffer
General Description
These devices provide eight, two-input buffers in each
package. All employ low-power-Schottky TTL technology.
One of the two inputs to each buffer is used as a control
line to gate the output into the high-impedance state, while
the other input passes the data through the buffer. The
DM81LS95A and DM81LS97A present true data at the out-
puts, while the DM81LS96A is inverting. On the
DM81LS95A and DM81LS96A versions, all eight 3-STATE
enable lines are common, with access through a 2-input
NOR gate. On the DM81LS97A version, four buffers are
enabled from one common line, and the other four buffers
are enabled form another common line. In all cases the
outputs are placed in the 3-STATE condition by applying a
high logic level to the enable pins.
Features
s
Typical power dissipation
DM81LS95A, DM81LS97A
DM81LS96A
s
Typical propagation delay
DM81LS95A, DM81LS97A
DM81LS96A
15 ns
10 ns
80 mW
65 mW
s
Low power-Schottky, 3-STATE technology
Ordering Code:
Order Number
DM81LS95AWM
DM81LS95AN
DM81LS96AWM
DM81LS96AN
DM81LS97AN
Package Number
M20B
N20A
M20B
N20A
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
DM81LS95A and DM92LS96A
Pin Names
A1–A8
Y1–Y8
G1–G2
Inputs
Outputs
Active LOW Output Enables (Note 1)
Descriptions
Note 1:
Both G1 and G2 must be LOW for outputs to be enabled.
DM81LS97A
Pin Names
A1–A8
Y1–Y8
G1
G2
Inputs
Outputs
Active LOW Output Enable (Y1–Y4)
Active LOW Output Enable (Y5–Y8)
Descriptions
© 1999 Fairchild Semiconductor Corporation
DS006435
www.fairchildsemi.com
DM81LS95A • DM81LS96A • DM81LS97A
Absolute Maximum Ratings
(Note 2)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
7V
7V
0°C to
+70°C
−65°C
to
+150°C
Note 2:
The Absolute Maximum Ratings are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The Recommended Operating Conditions table will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0
Parameter
Min
4.75
2
0.8
−5.2
24
70
Nom
5
Max
5.25
Units
V
V
V
mA
mA
°C
3
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DM81LS95A • DM81LS96A • DM81LS97A
DC Electrical Characteristics
Symbol
V
I
V
OH
V
OL
Parameter
Input Clamp Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
DM81LS95A and DM81LS97A
Conditions
Min
Typ
(Note 3)
Max
−1.5
2.7
0.5
0.4
0.1
20
A (Note 4)
A (Note 5)
G
−20
−50
−50
20
µA
µA
mA
µA
Units
V
V
over recommended operating free air temperature range (unless otherwise noted)
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
I
OL
=
Max, V
IH
=
Min
I
OL
=
12 mA, V
CC
=
Min
V
I
I
I
IH
I
IL
Input Current @ Max
Input Voltage
HIGH Level Input Current
LOW Level Input Current
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max
V
I
=
0.5V
V
I
=
0.4V
I
OZH
Off-State Output Current
with HIGH Level Output
Voltage Applied
V
CC
=
Max, V
O
=
2.4V
V
IH
=
Min, V
IL
=
Max
V
CC
=
Max, V
O
=
0.4V
V
IH
=
Min, V
IL
=
Max
V
CC
=
Max
(Note 6)
V
CC
=
Max (Note 4)
−20
µA
I
OZL
Off-State Output Current
with LOW Level Output
Voltage Applied
I
OS
I
CC
Short Circuit
Output Current
Supply Current
−20
16
−100
26
mA
mA
Note 3:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 4:
Both G inputs are at 2V.
Note 5:
Both G inputs are at 0.4V.
Note 6:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
AC Electrical Characteristics
V
CC
=
5V, T
A
=
25°C
Symbol
Parameter
DM81LS95A and DM81LS97A
R
L
=
667
Ω
C
L
=
50 pF
Min
Max
16
28
25
30
20
27
C
L
=
150 pF
Min
Max
25
40
30
42
ns
ns
ns
ns
ns
ns
Units
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output (Note 7)
Output Disable Time
from LOW Level Output (Note 7)
Note 7:
C
L
=
5 pF.
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4
DM81LS95A • DM81LS96A • DM81LS97A
DC Electrical Characteristics
Symbol
V
I
V
OH
V
OL
Parameter
Input Clamp Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
DM81LS96A
Conditions
Min
Typ
(Note 8)
Max
−1.5
2.7
0.5
0.4
0.1
20
A (Note 9)
A (Note 10)
G
−20
−50
−50
20
µA
µA
mA
µA
Units
V
V
over recommended operating free air temperature range (unless otherwise noted)
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
I
OL
=
Max, V
IH
=
Min
I
OL
=
12 mA, V
CC
=
Min
V
I
I
I
IH
I
IL
Input Current @ Max
Input Voltage
HIGH Level Input Current
LOW Level Input Current
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max
V
I
=
0.5V
V
I
=
0.4V
V
CC
=
Max, V
O
=
2.4V
V
IH
=
Min, V
IL
=
Max
V
CC
=
Max, V
O
=
0.4V
V
IH
=
Min, V
IL
=
Max
V
CC
=
Max
(Note 11)
V
CC
=
Max (Note 10)
I
OZH
Off-State Output Current
with HIGH Level Output
Voltage Applied
I
OZL
Off-State Output Current
with LOW Level Output
Voltage Applied
−20
µA
I
OS
I
CC
Short Circuit
Output Current
Supply Current
−20
13
−100
21
mA
mA
Note 8:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 9:
Both G inputs are at 2V.
Note 10:
Both G inputs are at 0.4V.
Note 11:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
AC Electrical Characteristics
V
CC
=
5V, T
A
=
25°C
Symbol
Parameter
DM81LS96A
R
L
=
667
Ω
C
L
=
50 pF
Min
Max
10
17
15
35
20
27
C
L
=
150 pF
Min
Max
16
30
30
45
ns
ns
ns
ns
ns
ns
Units
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output (Note 12)
Output Disable Time
from LOW Level Output (Note 12)
Note 12:
C
L
=
5 pF.
5
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