ON Semiconductor MC74HC244A Technical data
MC74HC244A
2
Octal 3−State Noninverting
Buffer/Line Driver/
Line Receiver
High−Performance Silicon−Gate CMOS
The MC74HC244A is identical in pinout to the LS244. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
This octal noninverting buffer/line driver/line receiver is designed
http://onsemi.com
MARKING
DIAGRAMS
to be used with 3−state memory address drivers, clock drivers, and
other bus−oriented systems. The device has noninverting outputs and
two active−low output enables.
The HC244A is similar in function to the HC240A.
Features
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1 mA
20
0
1
1
PDIP−20
N SUFFIX
CASE 738
SOIC−20
DW SUFFIX
CASE 751D
• High Noise Immunity Characteristic of CMOS Devices
20
MC74HC244AN
AWLYYWWG
1
20
74HC244A
AWLYYWWG
1
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 136 FETs or 34 Equivalent Gates
• Pb−Free Packages are Available*
20
TSSOP−20
DT SUFFIX
1
CASE 948E
20
HC
244A
ALYWG
G
1
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
July, 2005 − Rev. 10
1 Publication Order Number:
20
20
1
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
SOEIAJ−20
F SUFFIX
CASE 967
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G = Pb−Free Package
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
74HC244A
AWLYWWG
1
MC74HC244A/D
MC74HC244A
PIN ASSIGNMENT
ENABLE A
A1
YB4
A2
YB3 5
A3
YB2
A4
YB1
GND
1
2
3
4
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
FUNCTION TABLE
Inputs Outputs
Enable A,
Enable B A, B YA, YB
LLL
LHH
HXZ
Z = high impedance
V
CC
ENABLE B
YA1
B4
YA2
B3
YA3
B2
YA4
B1
DATA
INPUTS
OUTPUT
ENABLES
LOGIC DIAGRAM
218
A1
4
A2
6
A3
8
A4
11
B1
13
B2
15
B3
17
B4
ENABLE A
ENABLE B
1
19
YA1
16
YA2
14
YA3
12
YA4
9
YB1
7
YB2
5
YB3
3
YB4
PIN 20 = V
PIN 10 = GND
CC
NONINVERTING
OUTPUTS
ORDERING INFORMATION
Device Package Shipping
MC74HC244AN PDIP−20 18 Units / Rail
MC74HC244ANG SOIC−20
(Pb−Free)
MC74HC244ADW SOIC−20 WIDE 38 Units / Rail
MC74HC244ADWG SOIC−20 WIDE
(Pb−Free)
MC74HC244ADWR2 SOIC−20 WIDE 1000 Tape & Reel
MC74HC244ADWR2G SOIC−20 WIDE
(Pb−Free)
MC74HC244ADT TSSOP−20* 75 Units / Rail
MC74HC244ADTG TSSOP−20* 75 Units / Rail
MC74HC244ADTR2 TSSOP−20* 2500 Tape & Reel
MC74HC244ADTR2G TSSOP−20* 2500 Tape & Reel
MC74HC244AF SOEIAJ−20 40 Units / Rail
MC74HC244AFG SOEIAJ−20
(Pb−Free)
MC74HC244AFEL SOEIAJ−20 2000 Tape & Reel
MC74HC244AFELG SOEIAJ−20
(Pb−Free)
†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.
*This package is inherently Pb−Free.
18 Units / Rail
38 Units / Rail
1000 Tape & Reel
40 Units / Rail
2000 Tape & Reel
†
http://onsemi.com
2
MC74HC244A
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
ÎÎ
Î
Î
Î
Î
Î
Î
ÎÎ
ÎÎ
Î
Î
Î
Î
Î
Î
ÎÎ
ÎÎ
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
ÎÎ
ÎÎ
ÎÎ
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
ÎÎ
ÎÎ
ÎÎ
ÎÎ
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ÎÎ
Î
Î
Î
Î
MAXIMUM RATINGS
Symbol
V
V
ÎÎ
ÎÎ
DC Supply Voltage (Referenced to GND)
CC
V
DC Input Voltage (Referenced to GND)
in
DC Output Voltage (Referenced to GND)
out
I
DC Input Current, per Pin
in
I
DC Output Current, per Pin
out
I
DC Supply Current, VCC and GND Pins
CC
P
Power Dissipation in Still Air, Plastic DIP†
D
ОООООООООООО
T
Storage Temperature
stg
T
Lead Temperature, 1 mm from Case for 10 Seconds
L
(Plastic DIP, SOIC, SSOP or TSSOP Package)
ОООООООООООО
Maximum ratings are those values beyond which device damage can occur. Maximum ratings
applied to the device are individual stress limit values (not normal operating conditions) and are
not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
†Derating — Plastic DIP: – 10 mW/_C from 65_ to 125_C
SOIC Package: – 7 mW/_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/_C from 65_ to 125_C
For high frequency or heavy load considerations, see Chapter 2 of the ON Semiconductor High−Speed CMOS Data Book (DL129/D).
Parameter
SOIC Package†
TSSOP Package†
Value
– 0.5 to + 7.0
– 0.5 to VCC + 0.5
– 0.5 to VCC + 0.5
± 20
± 35
± 75
750
500
ÎÎÎ
450
– 65 to + 150
260
ÎÎÎ
Unit
mA
mA
mA
mW
Î
Î
_C
_C
This device contains protection
V
V
V
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high−impedance circuit. For proper operation, Vin and
V
should be constrained to the
out
range GND v (Vin or V
) v VCC.
out
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
Vin, V
T
A
tr, t
f
ÎÎ
ÎÎ
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
out
Operating Temperature, All Package Types
Input Rise and Fall Time VCC = 2.0 V
ОООООООООООО
(Figure 1) VCC = 4.5 V
ОООООООООООО
Parameter
VCC = 6.0 V
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Symbol
ÎÎ
V
IH
ÎÎ
V
IL
ÎÎ
ÎÎ
V
OH
ÎÎ
ÎÎ
ÎÎ
V
OL
ÎÎ
ÎÎ
ÎÎ
ÎÎ
ОООООООО
Minimum High−Level Input Voltage
ОООООООО
Maximum Low−Level Input Voltage
ОООООООО
ОООООООО
Minimum High−Level Output
Voltage
ОООООООО
ОООООООО
ОООООООО
Maximum Low−Level Output
ОООООООО
Voltage
ОООООООО
ОООООООО
ОООООООО
Parameter
Test Conditions
ООООООО
V
= VCC – 0.1 V
out
|I
| v 20 mA
out
ООООООО
V
= 0.1 V
out
ООООООО
|I
| v 20 mA
out
ООООООО
Vin = V
IH
|I
| v 20 mA
out
ООООООО
Vin = V
IH
ООООООО
Vin = V
IL
ООООООО
|I
| v 20 mA
out
ООООООО
Vin = V
IL
ООООООО
http://onsemi.com
Min
2.0
0
– 55
0
0
0
|I
|I
|I
|I
|I
|I
3
out
out
out
out
out
out
Max
6.0
V
CC
+ 125
1000
ÎÎ
500
400
ÎÎ
| v 2.4 mA
| v 6.0 mA
| v 7.8 mA
| v 2.4 mA
| v 6.0 mA
| v 7.8 mA
Unit
V
V
_C
ns
Î
Î
V
Î
2.0
3.0
Î
4.5
6.0
2.0
Î
3.0
4.5
Î
6.0
2.0
4.5
Î
6.0
3.0
4.5
Î
6.0
2.0
Î
4.5
6.0
Î
3.0
4.5
6.0
Î
CC
V
Guaranteed Limit
– 55 to
25_C
ÎÎ
1.5
2.1
ÎÎ
3.15
4.2
0.5
ÎÎ
0.9
1.35
ÎÎ
1.8
1.9
4.4
ÎÎ
5.9
2.48
3.98
ÎÎ
5.48
0.1
ÎÎ
0.1
0.1
ÎÎ
0.26
0.26
0.26
ÎÎ
v 85_C
ÎÎ
1.5
2.1
ÎÎ
3.15
4.2
0.5
ÎÎ
0.9
1.35
ÎÎ
1.8
1.9
4.4
ÎÎ
5.9
2.34
3.84
ÎÎ
5.34
0.1
ÎÎ
0.1
0.1
ÎÎ
0.33
0.33
0.33
ÎÎ
v 125_C
ÎÎ
1.5
2.1
ÎÎ
3.15
4.2
0.5
ÎÎ
0.9
1.35
ÎÎ
1.8
1.9
4.4
ÎÎ
5.9
2.2
3.7
ÎÎ
5.2
0.1
ÎÎ
0.1
0.1
ÎÎ
0.4
0.4
0.4
ÎÎ
Unit
V
V
V
V
Loading...