Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter
Test Conditions
Cpd
Power dissipation capacitance
f = 1 MHz all outputs switching-no load
Parameter Measurement Information
74AHC138
VCC = 5 V
TYP
18
Unit
pF
Vcc
2.0V -6.0V
5.0V
Inputs
VI
tr/tf
VCC
6ns
VCC
6ns
VM
VCC/2
VCC/2
CL
50pF
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. tPLH and tPHL are the same as tPD
Figure 1. Load Circuit and Voltage Waveforms
74AHC138
Document number: DS35482 Rev. 2 - 2
6 of 10
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June 2013
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