74HC244D-652 Datasheet, PDF (4/18 Pages) NXP Semiconductors – Octal buffer/line driver; 3-state Rev. 4 — 24 September 2012

NXP Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
6. Functional description
Table 3. Function table^[1]
Input
nOE
nAn
L
L
L
H
H
X
Output
nYn
L
H
Z
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
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
V_CC
I_IK
I_OK
I_O
I_CC
I_GND
T_stg
P_tot
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
V_I < 0.5 V or V_I > V_CC + 0.5 V
V_O < 0.5 V or V_O > V_CC + 0.5 V
0.5 V < V_O < V_CC + 0.5 V
DIP20 package
SO20, SSOP20, TSSOP20 and
DHVQFN20 packages
0.5
-
-
-
-
70
65
[1] _-
[2] _-
+7
V
20 mA
20 mA
35 mA
70
mA
-
mA
+150 C
750 mW
500 mW
[1] For DIP20 package: P_tot derates linearly with 12 mW/K above 70 C.
[2] For SO20 packages: P_tot derates linearly with 8 mW/K above 70 C.
For SSOP20 and TSSOP20 packages: P_tot 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 5. Recommended operating conditions
Symbol
Parameter
Conditions
74HC244
V_CC
V_I
V_O
t/V
T_amb
supply voltage
input voltage
output voltage
input transition rise and fall rate V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
ambient temperature
Min
Typ
Max
Unit
2.0
5.0
6.0
V
0
-
0
-
-
-
V_CC
V
V_CC
V
625
ns/V
-
1.67
139
ns/V
-
-
83
ns/V
40
-
+125
C
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 24 September 2012
© NXP B.V. 2012. All rights reserved.
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