Diodes 74HC138 - Manual (Page 6)

74HC138
Document number: DS35488 Rev.3 - 2
6 of 10
www.diodes.com
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