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74HC244 Datasheet(PDF) 2 Page - ON Semiconductor

Part No. 74HC244
Description  Octal 3−State Noninverting Buffer/Line Driver/Line Receiver
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

74HC244 Datasheet(HTML) 2 Page - ON Semiconductor

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74HC244
http://onsemi.com
2
LOGIC DIAGRAM
DATA
INPUTS
A1
A2
A3
A4
B1
B2
B3
B4 17
15
13
11
8
6
4
218
16
14
12
9
7
5
3 YB4
YB3
YB2
YB1
YA4
YA3
YA2
YA1
NONINVERTING
OUTPUTS
PIN 20 = VCC
PIN 10 = GND
OUTPUT
ENABLES
ENABLE A
ENABLE B
1
19
FUNCTION TABLE
Inputs
Outputs
Enable A,
Enable B
A, B
YA, YB
LLL
LH
H
HX
Z
Z = high impedance
PIN ASSIGNMENT
A3
A2
YB4
A1
ENABLE A
GND
YB1
A4
YB2
YB3
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
YA2
B4
YA1
ENABLE B
VCC
B1
YA4
B2
YA3
B3
ORDERING INFORMATION
Device
Package
Shipping
74HC244DTR2G
TSSOP−20*
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.
*This package is inherently Pb−Free.
MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
– 0.5 to + 7.0
V
Vin
DC Input Voltage (Referenced to GND)
– 0.5 to VCC + 0.5
V
Vout
DC Output Voltage (Referenced to GND)
– 0.5 to VCC + 0.5
V
Iin
DC Input Current, per Pin
±20
mA
Iout
DC Output Current, per Pin
±35
mA
ICC
DC Supply Current, VCC and GND Pins
±75
mA
PD
Power Dissipation in Still Air, TSSOP Package†
450
mW
Tstg
Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature, 1 mm from Case for 10 Seconds
(TSSOP Package)
260
_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.
†Derating — 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).
This device contains protection
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 cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.


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