m74hct138 STMicroelectronics, m74hct138 Datasheet - Page 4

• Manufacturer Part Number: m74hct138
• Description: 3 To 8 Line Decoder Inverting
• Manufacturer: STMicroelectronics

M74HCT138
AC ELECTRICAL CHARACTERISTICS (C
CAPACITIVE CHARACTERISTICS
1) C
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
TEST CIRCUIT
C
R
4/9
t
t
t
t
Symbol
Symbol
L
T
PLH
PLH
PLH
TLH
= 50pF or equivalent (includes jig and probe capacitance)
= Z
C
PD
C
PD
IN
t
t
t
t
OUT
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
THL
PHL
PHL
PHL
of pulse generator (typically 50 )
Output Transition
Time
Propagation Delay
Time (A, B, C - Y)
Propagation Delay
Time (G1 - Y)
Propagation Delay
Time (G2 - Y)
Input Capacitance
Power Dissipation
Capacitance (note
1)
Parameter
Parameter
V
V
(V)
4.5
4.5
4.5
4.5
(V)
CC
CC
Test Condition
Test Condition
L
= 50 pF, Input t
Min.
Min.
T
T
A
A
r
Typ.
Typ.
= 25° C
= 25° C
17
16
19
52
= t
8
5
f
= 6ns)
Max.
Max.
15
30
30
30
10
Value
Value
-40 to 85°C
Min.
-40 to 85°C
Min.
CC(opr)
= C
Max.
Max.
19
38
38
38
10
PD
x V
-55 to 125° C
-55 to 125° C
Min.
Min.
CC
x f
IN
Max.
Max.
+ I
22
45
45
45
10
CC
Unit
Unit
pF
pF
ns
ns
ns
ns