m74hc251 STMicroelectronics, m74hc251 Datasheet - Page 5

• Manufacturer Part Number: m74hc251
• Description: 8-channel Multiplexer 3-state
• Manufacturer: STMicroelectronics

AC ELECTRICAL CHARACTERISTICS (C
CAPACITIVE CHARACTERISTICS
1) C
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
t
t
t
t
Symbol
Symbol
TLH
PLH
PZL
PLZ
t
C
PD
C
PHL
PD
IN
t
t
t
t
PZH
PHZ
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
THL
PHL
Output Transition
Time
Propagation Delay
Time
(D - Y, W)
Propagation Delay
Time
(A, B, C -Y, W)
High Impedance
Output Enable
Time
High Impedance
Output Disable
Time
Input Capacitance
Power Dissipation
Capacitance (note
1)
Parameter
Parameter
V
V
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
(V)
5.0
5.0
CC
CC
Test Condition
Test Condition
R
R
L
L
= 1 K
= 1 K
L
= 50 pF, Input t
Min.
Min.
T
T
A
A
r
Typ.
Typ.
= 25°C
= 25°C
30
64
16
14
80
20
17
36
26
13
62
11
11
= t
8
7
9
5
f
= 6ns)
Max.
Max.
130
160
75
15
13
26
22
32
27
90
18
15
85
17
14
10
Value
Value
-40 to 85°C
Min.
-40 to 85°C
Min.
CC(opr)
= C
Max.
Max.
165
200
115
105
95
19
16
33
28
40
34
23
20
21
18
10
PD
x V
-55 to 125°C
-55 to 125°C
Min.
Min.
CC
x f
IN
M74HC251
Max.
Max.
+ I
195
240
135
130
115
23
20
39
33
48
41
27
23
26
22
10
CC
Unit
Unit
pF
pF
ns
ns
ns
ns
ns
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