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74HC244 Datasheet(PDF) 4 Page - NXP Semiconductors

Part No. 74HC244
Description  Octal buffer/line driver; 3-state
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC244 Datasheet(HTML) 4 Page - NXP Semiconductors

 
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74HC_HCT244
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 24 September 2012
4 of 18
NXP Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
6.
Functional description
[1]
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7.
Limiting values
[1]
For DIP20 package: Ptot derates linearly with 12 mW/K above 70 C.
[2]
For SO20 packages: Ptot derates linearly with 8 mW/K above 70 C.
For SSOP20 and TSSOP20 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
For DHVQFN20 packages: above 60
C, P
tot derates linearly with 4.5 mW/K.
8.
Recommended operating conditions
Table 3.
Function table[1]
Input
Output
nOE
nAn
nYn
LLL
LH
H
HX
Z
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
0.5
+7
V
IIK
input clamping current
VI < 0.5 V or VI >VCC +0.5 V
-
20
mA
IOK
output clamping current
VO < 0.5 V or VO >VCC +0.5 V
-
20
mA
IO
output current
0.5 V < V
O < VCC +0.5 V
-
35
mA
ICC
supply current
-
70
mA
IGND
ground current
70
-
mA
Tstg
storage temperature
65
+150
C
Ptot
total power dissipation
DIP20 package
[1] -
750
mW
SO20, SSOP20, TSSOP20 and
DHVQFN20 packages
[2] -
500
mW
Table 5.
Recommended operating conditions
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
74HC244
VCC
supply voltage
2.0
5.0
6.0
V
VI
input voltage
0
-
VCC
V
VO
output voltage
0
-
VCC
V
t/V
input transition rise and fall rate VCC = 2.0 V
-
-
625
ns/V
VCC = 4.5 V
-
1.67
139
ns/V
VCC = 6.0 V
-
-
83
ns/V
Tamb
ambient temperature
40
-
+125
C


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