MC74AC540
MC74ACT540
MC74AC541
MC74ACT541
OCTAL
BUFFER/LINE DRIVER
WITH 3-STATE
OUTPUTS
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.
•
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
MC74AC540/74ACT540
MC74AC541/74ACT541
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
VCC
OE2
OE1
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
VCC
OE2
OE1
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
TRUTH TABLE
Inputs
OE1
L
H
X
L
OE2
L
X
H
L
D
H
X
X
L
Outputs
′540
L
Z
Z
H
′541
H
Z
Z
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
GND
10
GND
10
FACT DATA
5-1
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
MAXIMUM RATINGS*
Symbol
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
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 VCC or GND Current per Output Pin
Storage Temperature
Value
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
±20
±50
±50
–65 to +150
Unit
V
V
V
mA
mA
mA
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Vin, Vout
Supply Voltage
DC Input Voltage, Output Voltage (Ref. to GND)
VCC @ 3.0 V
tr, tf
Input Rise and Fall Time (Note 1)
′AC
Devices except Schmitt Inputs
VCC @ 4.5 V
VCC @ 5.5 V
tr, tf
TJ
TA
IOH
IOL
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
–40
25
VCC @ 4.5 V
VCC @ 5.5 V
Parameter
′AC
′ACT
Min
2.0
4.5
0
150
40
25
10
ns/V
8.0
140
85
–24
24
°C
°C
mA
mA
ns/V
Typ
5.0
5.0
Max
6.0
5.5
VCC
V
Unit
V
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
FACT DATA
5-2
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
DC CHARACTERISTICS
74AC
Symbol
Parameter
VCC
(V)
TA = +25°C
Typ
VIH
Minimum High Level
Input Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
VOL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
IIN
IOZ
Maximum Input
Leakage Current
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
0.002
0.001
0.001
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
74AC
TA =
–40°C to +85°C
Unit
Conditions
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
V
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = –50
µA
V
*VIN = VIL or VIH
–12 mA
IOH
–24 mA
–24 mA
IOUT = 50
µA
V
*VIN = VIL or VIH
12 mA
IOL
24 mA
24 mA
VI = VCC, GND
VI (OE) = VIL, VIH
VI = VCC, GND
VO = VCC, GND
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
VIL
Maximum Low Level
Input Voltage
V
VOH
Minimum High Level
Output Voltage
V
V
µA
5.5
5.5
5.5
5.5
±0.5
±5.0
75
–75
µA
mA
mA
µA
IOLD
IOHD
ICC
8.0
80
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
FACT DATA
5-3
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
AC CHARACTERISTICS
(For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
Min
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
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)
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
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
TA = +25°C
CL = 50 pF
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
TA = –40°C
to +85°C
CL = 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
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3-5
3-5
3-7
3-8
3-7
3-8
3-5
3-5
3-7
3-8
3-7
3-8
Unit
Fig.
No.
* Voltage Range 3.3 V is 3.3 V
±0.3
V.
Voltage Range 5.0 V is 5.0 V
±0.5
V.
FACT DATA
5-4
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
DC CHARACTERISTICS
74ACT
Symbol
Parameter
VCC
(V)
TA = +25°C
Typ
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
VOL
Maximum Low Level
Output Voltage
4.5
5.5
4.5
5.5
IIN
∆I
CCT
IOZ
Maximum Input
Leakage Current
Additional Max. ICC/Input
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
5.5
5.5
8.0
0.6
±0.5
0.001
0.001
1.5
1.5
1.5
1.5
4.49
5.49
74ACT
TA =
–40°C to +85°C
Unit
Conditions
Guaranteed Limits
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
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
V
V
V
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = –50
µA
*VIN = VIL or VIH
–24 mA
IOH
–24 mA
IOUT = 50
µA
*VIN = VIL or VIH
24 mA
IOL
24 mA
VI = VCC, GND
VI = VCC – 2.1 V
VI (OE) = VIL, VIH
VI = VCC, GND
VO = VCC, GND
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
V
V
V
µA
mA
µA
mA
mA
µA
IOLD
IOHD
ICC
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-5
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