Operating characteristics, Parameter measurement information – Diodes 74HC138 User Manual
Page 6
74HC138
Document number: DS35488 Rev.3 - 2
6 of 10
June 2013
© Diodes Incorporated
74HC138
Operating Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Parameter
Test
Conditions
V
CC
= 5V
Unit
Typ
C
pd
Power dissipation
capacitance
f = 1 MHz all outputs switching-no load
19
pF
Parameter Measurement Information
Vcc
Inputs
V
M
C
L
V
I
t
r
/t
f
2.0V -6.0V
V
CC
6 ns
V
CC
/2
50pF
5.0V
V
CC
6 ns
V
CC
/2
15pF used for 5V typical test
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Notes: A. Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate
≤ 10 MHz.
C. Inputs are measured separately one transition per measurement
D. t
PLH
and t
PHL
are the same as t
PD
Figure 1 Load Circuit and Voltage Waveforms