M74HC4078 STMICROELECTRONICS [STMicroelectronics], M74HC4078 Datasheet - Page 4

• Manufacturer Part Number: M74HC4078
• Description: 8 INPUT NOR/OR GATE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M54/M74HC4078
AC ELECTRICAL CHARACTERISTICS (C
(*) C
(Refer to Test Circuit). Average operting current can be obtained by the following equation. I
SWITCHING CHARACTERISTICS TEST CIRCUIT
TEST CIRCUIT I
4/9
Symbol
C
t
t
t
t
PD
C
TLH
THL
PLH
PHL
PD
IN
(*)
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST.
Output Transition
Time
Propagation
Delay Time
Input Capacitance
Power Dissipation
Capacitance
Parameter
CC
(Opr.)
V
(V)
2.0
4.5
6.0
2.0
4.5
6.0
CC
Test Conditions
L
= 50 pF, Input t
Min.
54HC and 74HC
T
A
Typ.
= 25
30
48
12
10
37
8
7
5
o
C
Max.
75
15
13
95
19
16
10
CC
r
(opr) = C
= t
Value
f
-40 to 85
Min.
= 6 ns)
PD
74HC
V
CC
Max.
120
95
19
16
24
20
10
o
f
C
IN
+ I
-55 to 125
CC
Min.
54HC
Max.
110
145
22
19
29
25
10
o
C
Unit
pF
pF
ns
ns