MC74AC244, MC74ACT244
Octal Buffer/Line Driver
with 3-State Outputs
The MC74AC244/74ACT244 is an octal buffer and line driver
designed to be employed as a memory address driver, clock driver and
bus oriented transmitter/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
•
′ACT244
Has TTL Compatible Inputs
•
These are Pb−Free Devices
V
CC
20
OE
2
19
18
17
16
15
14
13
12
11
1
1
SOIC−20W
DW SUFFIX
CASE 751D
TSSOP−20
DT SUFFIX
CASE 948E
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
1
OE
1
2
3
4
5
6
7
8
9
10
GND
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 5 of this data sheet.
Pinout: 20−Lead Packages Conductors
(Top View)
TRUTH TABLE
Inputs
OE
1
L
L
H
NOTE:
D
L
H
X
Outputs
(Pins 12, 14, 16, 18)
L
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
TRUTH TABLE
Inputs
OE
2
L
L
H
NOTE:
D
L
H
X
Outputs
(Pins 3, 5, 7, 9)
L
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
©
Semiconductor Components Industries, LLC, 2015
1
February, 2015 − Rev. 8
Publication Order Number:
MC74AC244/D
MC74AC244, MC74ACT244
MAXIMUM RATINGS
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
I
CC
I
GND
T
STG
T
L
T
J
q
JA
MSL
F
R
V
ESD
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND) (Note 1)
DC Input Diode Current
DC Output Diode Current
DC Output Sink/Source Current
DC Supply Current, per Output Pin
DC Ground Current, per Output Pin
Storage Temperature Range
Lead temperature, 1 mm from Case for 10 Seconds
Junction Temperature Under Bias
Thermal Resistance (Note 2)
Moisture Sensitivity
Flammability Rating
ESD Withstand Voltage
Oxygen Index: 30% − 35%
Human Body Model (Note 3)
Machine Model (Note 4)
Charged Device Model (Note 5)
Above V
CC
and Below GND at 85_C (Note 6)
SOIC
TSSOP
Value
−0.5 to +7.0
−0.5 to V
CC
+0.5
−0.5 to V
CC
+0.5
±20
±50
±50
±50
±100
*65
to
)150
260
140
65.8
110.7
Level 1
UL 94 V−0 @ 0.125 in
> 2000
> 200
> 1000
±100
V
Unit
V
V
V
mA
mA
mA
mA
mA
_C
_C
_C
_C/W
I
Latchup
Latchup Performance
mA
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. I
OUT
absolute maximum rating must be observed.
2. The package thermal impedance is calculated in accordance with JESD 51−7.
3. Tested to EIA/JESD22−A114−A.
4. Tested to EIA/JESD22−A115−A.
5. Tested to JESD22−C101−A.
6. Tested to EIA/JESD78.
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 7)
′AC
Devices except Schmitt Inputs
Input Rise and Fall Time (Note 8)
′ACT
Devices except Schmitt Inputs
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
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
−
−
−
−
−
85
−24
24
ns/V
°C
mA
mA
ns/V
V
V
Unit
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
7. V
IN
from 30% to 70% V
CC
; see individual Data Sheets for devices that differ from the typical input rise and fall times.
8. 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
MC74AC244, MC74ACT244
DC CHARACTERISTICS
74AC
Symbol
Parameter
V
CC
(V)
T
A
= +25°C
Typ
V
IH
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
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
5.5
5.5
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
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
±0.5
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
±5.0
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
IL
Maximum Low Level Input Voltage
V
V
OH
Minimum High Level Output Voltage
V
V
*V
IN
= V
IL
or V
IH
−12 mA
I
OH
−24 mA
−24 mA
I
OUT
= 50
mA
V
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
mA
mA
I
OLD
I
OHD
I
CC
†Minimum Dynamic Output Current
5.5
5.5
−
−
−
−
−
8.0
75
−75
80
mA
mA
mA
Maximum Quiescent Supply Current
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
.
AC CHARACTERISTICS
(For Figures and Waveforms − See AND8277/D at www.onsemi.com)
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
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
2.0
1.5
2.0
1.5
2.0
1.5
2.5
1.5
3.0
2.5
2.5
2.0
T
A
= +25°C
C
L
= 50 pF
Typ
6.5
5.0
6.5
5.0
6.0
5.0
7.5
5.5
7.0
6.5
7.5
6.5
Max
9.0
7.0
9.0
7.0
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
1.5
1.0
2.0
1.0
1.5
1.5
2.0
1.5
1.5
1.0
2.5
2.0
Max
10.0
7.5
10.0
7.5
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
Figure
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.
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3
MC74AC244, MC74ACT244
DC CHARACTERISTICS
74ACT
Symbol
Parameter
V
CC
(V)
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
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
5.5
5.5
5.5
1.5
1.5
1.5
1.5
4.49
5.49
−
−
0.001
0.001
−
−
−
0.6
−
74ACT
T
A
=
−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
−
±0.5
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
mA
mA
mA
V
V
V
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
−24 mA
I
OH
−24 mA
I
OUT
= 50
mA
*V
IN
= V
IL
or V
IH
24 mA
24 mA
I
OL
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
I
OLD
I
OHD
I
CC
†Minimum Dynamic Output Current
5.5
5.5
−
−
−
−
−
8.0
75
−75
80
mA
mA
mA
Maximum Quiescent Supply Current
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.
AC CHARACTERISTICS
(For Figures and Waveforms − See AND8277/D at www.onsemi.com)
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
2.0
2.0
1.5
2.0
2.0
2.5
T
A
= +25°C
C
L
= 50 pF
Typ
6.5
7.0
6.0
7.0
7.0
7.5
Max
9.0
9.0
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
1.5
2.0
Max
10.0
10.0
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
Figure
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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4
MC74AC244, MC74ACT244
ORDERING INFORMATION
Device
MC74AC244DWG
MC74AC244DWR2G
MC74ACT244DWG
MC74ACT244DWR2G
MC74AC244DTR2G
MC74ACT244DTR2G
TSSOP−20
(Pb−Free)
SOIC−20
(Pb−Free)
Package
Shipping
†
38 Units / Rail
1000 / Tape & Reel
38 Units / Rail
1000 / Tape & Reel
2500 / Tape & Reel
2500 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
MARKING DIAGRAMS
SOIC−20W
TSSOP−20
20
AC244
AWLYYWWG
20
AC
244
ALYWG
G
1
1
20
ACT244
AWLYYWWG
20
ACT
244
ALYWG
G
1
1
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
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