54AC 74AC125
74ACT125 Quad Buffer with TRI-STATE Outputs
March 1993
54AC 74AC125
74ACT125
Quad Buffer with TRI-STATE Outputs
General Description
The ’AC ’ACT125 contains four independent non-inverting
buffers with TRI-STATE outputs
Features
Y
Y
Y
I
CC
reduced by 50%
Outputs source sink 24 mA
’ACT125 has TTL-compatible outputs
Logic Symbol
IEEE IEC
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 10692–1
TL F 10692 – 2
TL F 10692 – 3
Pin Names
A
n
B
n
O
n
Description
Inputs
Outputs
Function Table
Inputs
A
n
L
L
H
B
n
L
H
X
Output
O
n
L
H
Z
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
Z
e
HIGH Impedance
X
e
Immaterial
TRI-STATE is a registered trademark of National Semiconductor Corporation
FACT
TM
is a trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 10692
RRD-B30M75 Printed in U S A
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (V
CC
)
DC Input Diode Current (I
K
)
V
I
e b
0 5V
V
I
e
V
CC
a
0 5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
e b
0 5V
V
O
e
V
CC
a
0 5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
Junction Temperature (T
J
)
CDIP
PDIP
b
0 5V to
a
7 0V
b
20 mA
a
20 mA
b
0 5V to V
CC
a
0 5V
b
20 mA
a
20 mA
b
0 5V to V
CC
a
0 5V
g
50 mA
g
50 mA
Recommended Operating
Conditions
Supply Voltage (V
CC
)
’AC
’ACT
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
74AC ACT
54AC ACT
Minimum Input Edge Rate (DV
Dt)
’AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
3 3V 4 5V 5 5V
Minimum Input Edge Rate (DV
Dt)
’ACT Devices
V
IN
from 0 8V to 2 0V
V
CC
4 5V 5 5V
2 0V to 6 0V
4 5V to 5 5V
0V to V
CC
0V to V
CC
b
40 C to
a
85 C
b
55 C to
a
125 C
125 mV ns
b
65 C to
a
150 C
125 mV ns
175 C
140 C
Note 1
Absolute maximum ratings are those values beyond which damage
to the device may occur The databook specifications should be met without
exception to ensure that the system design is reliable over its power supply
temperature and output input loading variables National does not recom-
mend operation of FACT
TM
circuits outside databook specifications
DC Characteristics for ’AC Family Devices
74AC
Symbol
Parameter
V
CC
(V)
T
A
e a
25 C
Typ
V
IH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
30
45
55
30
45
55
30
45
55
30
45
55
V
OL
Maximum Low Level
Output Voltage
30
45
55
30
45
55
I
IN
Maximum Input
Leakage Current
55
0 002
0 001
0 001
15
2 25
2 75
15
2 25
2 75
2 99
4 49
5 49
21
3 15
3 85
09
1 35
1 65
29
44
54
2 56
3 86
4 86
01
01
01
0 36
0 36
0 36
g
0 1
54AC
T
A
e
b
55 C to
a
125 C
74AC
T
A
e
b
40 C to
a
85 C
Units
Conditions
Guaranteed Limits
21
3 15
3 85
09
1 35
1 65
29
44
54
24
37
47
01
01
01
0 50
0 50
0 50
g
1 0
21
3 15
3 85
09
1 35
1 65
29
44
54
2 46
3 76
4 76
01
01
01
0 44
0 44
0 44
g
1 0
V
V
OUT
e
0 1V
or V
CC
b
0 1V
V
OUT
e
0 1V
or V
CC
b
0 1V
I
OUT
e b
50
mA
V
IL
V
V
OH
V
V
IN
e
V
IL
or V
IH
b
12 mA
b
24 mA
I
OH
b
24 mA
I
OUT
e
50
mA
V
V
IN
e
V
IL
or V
IH
12 mA
I
OL
24 mA
24 mA
V
I
e
V
CC
GND
V
V
mA
All outputs loaded thresholds on input associated with output under test
2
DC Characteristics for ’AC Family Devices
(Continued)
74AC
Symbol
Parameter
V
CC
(V)
T
A
e a
25 C
Typ
I
OZ
Maximum TRI-STATE
Current
Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
55
55
55
55
40
g
0 5
54AC
T
A
e
b
55 C to
a
125 C
74AC
T
A
e
b
40 C to
a
85 C
Units
Conditions
Guaranteed Limits
g
10 0
g
5 0
mA
mA
mA
mA
V
I
(OE)
e
V
IL
V
IH
V
I
e
V
CC
V
GND
V
O
e
V
CC
GND
V
OLD
e
1 65V Max
V
OHD
e
3 85V Min
V
IN
e
V
CC
or GND
I
OLD
I
OHD
I
CC
50
b
50
75
b
75
80 0
40 0
Maximum test duration 2 0 ms one output loaded at a time
Note
I
IN
and I
CC
3 0V are guaranteed to be less than or equal to the respective limit
I
CC
for 54AC 25 C is identical to 74AC 25 C
5 5V V
CC
DC Characteristics for ’ACT Family Devices
74ACT
Symbol
Parameter
V
CC
(V)
T
A
e a
25 C
Typ
V
IH
V
IL
V
OH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
45
55
45
55
45
55
45
55
V
OL
Maximum Low Level
Output Voltage
45
55
45
55
I
IN
I
OZ
I
CCT
I
OLD
I
OHD
I
CC
Maximum Input Leakage Current
Maximum TRI-STATE
Current
Maximum I
CC
Input
Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
55
55
55
55
55
55
40
06
0 001
0 001
15
15
15
15
4 49
5 49
74ACT
T
A
e
b
40 C to
a
85 C
Units
Conditions
Guaranteed Limits
20
20
08
08
44
54
3 86
4 86
01
01
0 36
0 36
g
0 1
g
0 5
20
20
08
08
44
54
3 76
4 76
01
01
0 44
0 44
g
1 0
g
5 0
V
V
V
V
OUT
e
0 1V
or V
CC
b
0 1V
V
OUT
e
0 1V
or V
CC
b
0 1V
I
OUT
e b
50
mA
V
IN
e
V
IL
or V
IH
b
24 mA
I
OH
b
24 mA
I
OUT
e
50
mA
V
IN
e
V
IL
or V
IH
24 mA
I
OL
24 mA
V
I
e
V
CC
GND
V
I
e
V
IL
V
IH
V
O
e
V
CC
GND
V
I
e
V
CC
b
2 1V
V
OLD
e
1 65V Max
V
OHD
e
3 85V Min
V
IN
e
V
CC
or GND
V
V
V
mA
mA
mA
mA
mA
mA
15
75
b
75
40 0
All outputs loaded thresholds on input associated with output under test
Maximum test duration 2 0 ms one output loaded at a time
May be measured per the JEDEC Alternate Method
3
AC Electrical Characteristics
74AC
Symbol
Parameter
V
CC
(V)
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
Data to Output
Propagation Delay
Data to Output
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
33
50
33
50
33
50
33
50
33
50
33
50
10
10
10
10
10
10
10
10
10
10
10
10
T
A
e a
25 C
C
L
e
50 pF
Typ
65
55
65
50
60
50
75
55
75
65
75
65
Max
90
70
90
70
10 5
70
10 0
80
10 0
90
10 5
90
54AC
T
A
e b
55 C
to
a
125 C
C
L
e
50 pF
Min
Max
74AC
T
A
e b
40 C
to
a
85 C
C
L
e
50 pF
Min
10
10
10
10
10
10
10
10
10
10
10
10
Max
10 0
75
10 0
75
11 0
80
11 0
85
10 5
95
11 5
95
ns
ns
ns
ns
ns
ns
Units
Voltage Range 3 3 is 3 3V
g
0 3V
Voltage Range 5 0 is 5 0V
g
0 5V
AC Electrical Characteristics
74ACT
Symbol
Parameter
V
CC
(V)
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
Data to Output
Propagation Delay
Data to Output
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
50
50
50
50
50
50
10
10
10
10
10
10
T
A
e a
25 C
C
L
e
50 pF
Typ
65
70
60
70
70
75
Max
90
90
85
95
95
10 0
74ACT
T
A
e b
40 C
to
a
85 C
C
L
e
50 pF
Min
10
10
10
10
10
10
Max
10 0
10 0
95
10 5
10 5
10 5
ns
ns
ns
ns
ns
ns
Units
Voltage Range 5 0 is 5 0V
g
0 5V
Capacitance
Symbol
C
IN
C
PD
Parameter
Input Capacitance
Power Dissipation
Capacitance
AC ACT
Typ
45
45 0
pF
pF
V
CC
e
OPEN
V
CC
e
5 0V
Units
Conditions
4
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows
74AC
Temperature Range Family
74AC
e
Commercial
54AC
e
Military
74ACT
e
Commercial TTL-Compatible
Device Type
Package Code
P
e
Plastic DIP
D
e
Ceramic DIP
F
e
Flatpak
L
e
Leadless Ceramic Chip Carrier (LCC)
S
e
Small Outline (SOIC)
125
P
C
QR
Special Variations
X
e
Devices shipped in 13 reels
QR
e
Commercial grade device
with burn-in
QB
e
Military grade device with
environmental and burn-in
processing shipped in tubes
Temperature Range
C
e
Commercial (
b
40 C to
a
85 C)
M
e
Military (
b
55 C to
a
125 C)
5
