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| 74HC157_10 Datasheet, PDF (10/18 Pages) NXP Semiconductors – Quad 2-input multiplexer | |||
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NXP Semiconductors
74HC157; 74HCT157
Quad 2-input multiplexer
VI 90 %
negative
pulse
GND
VI
positive
pulse
10 %
GND
VM
10 %
tf
tr
90 %
VM
VI
G
RT
tW
tW
VCC
DUT
VM
tr
tf
VM
VO
CL
001aah768
Fig 9.
Test data is given in Table 9.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch.
Test circuit for measuring switching times
Table 9. Test data
Type
74HC157
74HCT157
Input
VI
VCC
3.0 V
tr, tf
6.0 ns
6.0 ns
Load
CL
15 pF, 50 pF
15 pF, 50 pF
Test
tPLH, tPHL
tPLH, tPHL
74HC_HCT157
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 â 31 December 2010
© NXP B.V. 2010. All rights reserved.
10 of 18
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