MC74AC540, MC74ACT540,
MC74AC541, MC74ACT541
Octal Buffer/Line Driver
with 3−State Outputs
The MC74AC540/74ACT540 and MC74AC541/74ACT541 are
octal buffer/line drivers designed to be employed as memory and
address drivers, clock drivers and bus oriented transmitter/receivers.
The MC74AC541/74ACT541 is a noninverting option of the
MC74AC540/74ACT540.
These devices are similar in function to the
MC74AC240/74ACT240 and MC74AC244/74ACT244 while
providing flow−through architecture (inputs on opposite side from
outputs). This pinout arrangement makes these devices especially
useful as output ports for microprocessors, allowing ease of layout and
greater PC board density.
Features
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PDIP−20
N SUFFIX
CASE 738
1
•
3−State Outputs
•
Inputs and Outputs Opposite Side of Package, Allowing Easier
•
•
•
•
•
Interface to Microprocessors
Outputs Source/Sink 24 mA
MC74AC540/74ACT540 Provides Inverted Outputs
MC74AC541/74ACT541 Provides Noninverted Outputs
′ACT540
and
′ACT541
Have TTL Compatible Inputs
Pb−Free Packages are Available
SOIC−20W
DW SUFFIX
CASE 751D
1
TSSOP−20
DT SUFFIX
CASE 948E
1
SOEIAJ−20
M SUFFIX
CASE 967
TRUTH TABLE
Inputs
OE
1
L
H
X
L
OE
2
L
X
H
L
D
H
X
X
L
Outputs
′540
L
Z
Z
H
′541
H
Z
Z
L
1
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
©
Semiconductor Components Industries, LLC, 2006
1
December, 2006 − Rev. 8
Publication Order Number:
MC74AC540/D
MC74AC540, MC74ACT540, MC74AC541, MC74ACT541
OE
1
V
CC
OE
2
OE
1
V
CC
OE
2
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
GND
10
GND
10
Figure 1. MC74AC540/74ACT540
Figure 2. MC74AC541/74ACT541
MAXIMUM RATINGS
Symbol
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
T
stg
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC V
CC
or GND Current per Output Pin
Storage Temperature
Value
−0.5 to +7.0
−0.5 to V
CC
+0.5
−0.5 to V
CC
+0.5
±20
±50
±50
−65 to +150
Unit
V
V
V
mA
mA
mA
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
Supply Voltage
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
@ 3.0 V
t
r
, t
f
Input Rise and Fall Time (Note 1)
′AC
Devices except Schmitt Inputs
Input Rise and Fall Time (Note 2)
′ACT
Devices except Schmitt Inputs
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current − High
Output Current − Low
V
CC
@ 4.5 V
V
CC
@ 5.5 V
t
r
, t
f
T
J
T
A
I
OH
I
OL
V
CC
@ 4.5 V
V
CC
@ 5.5 V
Parameter
′AC
′ACT
Min
2.0
4.5
0
−
−
−
−
−
−
−40
−
−
Typ
5.0
5.0
−
150
40
25
10
8.0
−
25
−
−
Max
6.0
5.5
V
CC
−
−
−
−
−
140
85
−24
24
ns/V
°C
°C
mA
mA
ns/V
V
V
Unit
1. V
IN
from 30% to 70% V
CC
; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. V
IN
from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
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2
MC74AC540, MC74ACT540, MC74AC541, MC74ACT541
DC CHARACTERISTICS
74AC
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
I
OZ
Maximum Input
Leakage Current
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
T
A
= +25°C
Typ
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
−
−
−
0.002
0.001
0.001
−
−
−
−
74AC
T
A
= −40°C to +85°C
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±1.0
Unit
V
Conditions
V
OUT
= 0.1 V
or V
CC
− 0.1 V
V
OUT
= 0.1 V
or V
CC
− 0.1 V
I
OUT
= −50
mA
V
*V
IN
= V
IL
or V
IH
−12 mA
I
OH
−24 mA
−24 mA
I
OUT
= 50
mA
V
*V
IN
= V
IL
or V
IH
12 mA
I
OL
24 mA
24 mA
V
I
= V
CC
, GND
V
I
(OE) = V
IL
, V
IH
V
I
= V
CC
, GND
V
O
= V
CC
, GND
V
OLD
= 1.65 V Max
V
OHD
= 3.85 V Min
V
IN
= V
CC
or GND
Symbol
V
IH
Parameter
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
V
IL
V
V
OH
V
V
mA
5.5
−
±0.5
−
−
8.0
±5.0
75
−75
80
mA
mA
mA
mA
I
OLD
I
OHD
I
CC
5.5
5.5
5.5
−
−
−
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE: I
IN
and I
CC
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
.
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3
MC74AC540, MC74ACT540, MC74AC541, MC74ACT541
AC CHARACTERISTICS
(For Figures and Waveforms − See AND8277/D at www.onsemi.com)
74AC
T
A
= +25°C
C
L
= 50 pF
Min
1.5
1.5
1.5
1.5
3.0
2.0
2.5
2.0
2.5
1.5
2.0
1.5
2.0
1.5
2.0
1.5
3.0
2.0
2.5
1.5
3.5
2.0
2.5
2.0
Typ
5.5
4.0
5.0
4.0
8.5
6.5
7.5
6.0
8.5
7.5
7.0
6.0
5.5
4.0
5.5
4.0
8.0
6.0
7.0
5.5
9.0
7.0
6.5
5.5
Max
7.5
6.0
7.0
5.5
11
8.5
10
7.5
13
10.5
10
8.0
8.0
6.0
8.0
6.0
11.5
8.5
10
7.5
12.5
9.5
9.5
7.5
74AC
T
A
= −40°C to +85°C
C
L
= 50 pF
Min
1.0
1.0
1.0
1.0
2.5
2.0
2.0
1.5
1.5
1.0
2.0
1.5
1.5
1.0
1.5
1.0
3.0
1.5
2.5
1.0
2.5
1.0
2.0
1.0
Max
8.0
6.5
7.5
6.0
12
9.5
11
8.5
14
11
11
9.0
9.0
6.5
8.5
6.5
12.5
9.5
11.5
8.5
14
10.5
10.5
8.5
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Propagation Delay
Data to Output (
′
AC540)
Propagation Delay
Data to Output (
′
AC540)
Output Enable Time
(
′
AC540)
Output Enable Time
(
′
AC540)
Output Disable Time
(
′
AC540)
Output Disable Time
(
′
AC540)
Propagation Delay
Data to Output (
′
AC541)
Propagation Delay
Data to Output (
′
AC541)
Output Enable Time
(
′
AC541)
Output Enable Time
(
′
AC541)
Output Disable Time
(
′
AC541)
Output Disable Time
(
′
AC541)
V
CC
*
(V)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
Fig.
No.
3−5
3−5
3−7
3−8
3−7
3−8
3−5
3−5
3−7
3−8
3−7
3−8
*Voltage Range 3.3 V is 3.3 V
±0.3
V.
Voltage Range 5.0 V is 5.0 V
±0.5
V.
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MC74AC540, MC74ACT540, MC74AC541, MC74ACT541
DC CHARACTERISTICS
74ACT
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
4.5
5.5
4.5
5.5
I
IN
DI
CCT
I
OZ
Maximum Input
Leakage Current
Additional Max. I
CC
/Input
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
T
A
= +25°C
Typ
1.5
1.5
1.5
1.5
4.49
5.49
−
−
0.001
0.001
−
−
−
0.6
2.0
2.0
0.8
0.8
4.4
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
−
±0.5
−
−
8.0
74ACT
T
A
= −40°C to +85°C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±1.0
1.5
±5.0
75
−75
80
Unit
V
V
V
Conditions
V
OUT
= 0.1 V
or V
CC
− 0.1 V
V
OUT
= 0.1 V
or V
CC
− 0.1 V
I
OUT
= −50
mA
*V
IN
= V
IL
or V
IH
I
OH
−24 mA
−24 mA
I
OUT
= 50
mA
*V
IN
= V
IL
or V
IH
24 mA
I
OL
24 mA
V
I
= V
CC
, GND
V
I
= V
CC
− 2.1 V
V
I
(OE) = V
IL
, V
IH
V
I
= V
CC
, GND
V
O
= V
CC
, GND
V
OLD
= 1.65 V Max
V
OHD
= 3.85 V Min
V
IN
= V
CC
or GND
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
V
V
V
mA
mA
mA
mA
mA
mA
5.5
−
I
OLD
I
OHD
I
CC
5.5
5.5
5.5
−
−
−
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
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