m74hc138 STMicroelectronics, m74hc138 Datasheet - Page 5

• Manufacturer Part Number: m74hc138
• Description: 3 To 8 Line Decoder Inverting
• Manufacturer: STMicroelectronics

CAPACITIVE CHARACTERISTICS
1) C
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
TEST CIRCUIT
C
R
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
Symbol
L
T
= 50pF or equivalent (includes jig and probe capacitance)
= Z
C
PD
C
PD
IN
OUT
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
of pulse generator (typically 50 )
Input Capacitance
Power Dissipation
Capacitance (note
1)
Parameter
V
(V)
5.0
5.0
CC
Test Condition
Min.
T
A
Typ.
= 25°C
47
5
Max.
10
Value
-40 to 85°C
Min.
CC(opr)
= C
Max.
10
PD
x V
-55 to 125°C
Min.
CC
x f
IN
M74HC138
Max.
+ I
10
CC
Unit
pF
pF
5/10