MC74AC240, MC74ACT240
Octal Buffer/Line Driver
with 3−State Outputs
The MC74AC240/74ACT240 is an octal buffer and line driver
designed to be employed as a memory address driver, clock driver and
bus oriented transmitter or receiver which provides improved PC
board density.
Features
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•
3−State Outputs Drive Bus Lines or Buffer Memory Address
Registers
•
Outputs Source/Sink 24 mA
•
′ACT240
Has TTL Compatible Inputs
•
Pb−Free Packages are Available
PDIP−20
N SUFFIX
CASE 738
1
TRUTH TABLE
Inputs
OE
1
L
L
H
NOTE:
D
L
H
X
Outputs
(Pins 12, 14, 16, 18)
H
L
Z
1
SOIC−20W
DW SUFFIX
CASE 751D
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
TSSOP−20
DT SUFFIX
CASE 948E
1
TRUTH TABLE
Inputs
OE
2
L
L
H
NOTE:
D
L
H
X
Outputs
(Pins 3, 5, 7, 9)
H
L
Z
1
SOEIAJ−20
M SUFFIX
CASE 967
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 7 of this data sheet.
V
CC
20
OE
2
19
18
17
16
15
14
13
12
11
1
OE
1
2
3
4
5
6
7
8
9
10
GND
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
©
Semiconductor Components Industries, LLC, 2006
1
November, 2006 − Rev. 8
Publication Order Number:
MC74AC240/D
MC74AC240, MC74ACT240
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
−
−
−
−
ns/V
−
140
85
−24
24
°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
MC74AC240, MC74ACT240
DC CHARACTERISTICS
74AC
Symbol
Parameter
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
V
IH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
−
−
−
0.002
0.001
0.001
−
−
−
−
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
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
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±1.0
V
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
Unit
Conditions
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
MC74AC240, MC74ACT240
AC CHARACTERISTICS
(For Figures and Waveforms − See AND8277/D at www.onsemi.com)
74AC
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
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
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
T
A
= +25°C
C
L
= 50 pF
Typ
6.0
4.5
5.5
4.5
6.0
5.0
7.0
5.5
7.0
6.5
7.5
6.5
Max
8.0
6.5
8.0
6.0
10.5
7.0
10.0
8.0
10.0
9.0
10.5
9.0
74AC
T
A
= −40°C
to +85°C
C
L
= 50 pF
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
9.0
7.0
8.5
6.5
11.0
8.0
11.0
8.5
10.5
9.5
11.5
9.5
ns
ns
ns
ns
ns
ns
3−5
3−5
3−7
3−8
3−7
3−8
Unit
Fig.
No.
Symbol
Parameter
*
Voltage Range 3.3 V is 3.3 V
±0.3
V.
Voltage Range 5.0 V is 5.0 V
±0.5
V.
DC CHARACTERISTICS
74ACT
Symbol
Parameter
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
5.5
T
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
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
V
V
V
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
Unit
Conditions
V
V
V
mA
mA
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.
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4
MC74AC240, MC74ACT240
AC CHARACTERISTICS
(For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
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
5.0
5.0
5.0
5.0
5.0
5.0
1.5
1.5
1.5
2.0
2.0
2.5
T
A
= +25°C
C
L
= 50 pF
Typ
6.0
5.5
7.0
7.0
8.0
6.5
Max
8.5
7.5
8.5
9.5
9.5
10.0
74ACT
T
A
= −40°C
to +85°C
C
L
= 50 pF
Min
1.5
1.5
1.0
1.5
2.0
2.0
Max
9.5
8.5
9.5
10.5
10.5
10.5
ns
ns
ns
ns
ns
ns
3−5
3−5
3−7
3−8
3−7
3−8
Unit
Fig.
No.
*Voltage Range 5.0 V is 5.0 V
±0.5
V.
CAPACITANCE
Symbol
C
IN
C
PD
Input Capacitance
Power Dissipation Capacitance
Parameter
Value
Typ
4.5
45
Unit
pF
pF
Test Conditions
V
CC
= 5.0 V
V
CC
= 5.0 V
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5
