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| 74HC_HCT4851_15 Datasheet, PDF (14/20 Pages) NXP Semiconductors – 8-channel analog multiplexer/demultiplexer with injection-current effect control | |||
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NXP Semiconductors
74HC4851; 74HCT4851
8-channel analog MUX/DEMUX with injection-current effect control
VI 90 %
tW
negative
pulse
VM
10 %
0V
tf
tr
VI
positive
pulse
90 %
VM
10 %
0V
tW
a. Input pulse deï¬nition
90 %
VM
tr
tf
VM
10 %
001aac221
VI
G
VCC
VO
DUT
switch
RL
VCC
open
RT
CL
GND
001aaf883
Deï¬nitions for test circuit:
RL = load resistance.
CL = load capacitance including jig and probe capacitance.
RT = termination resistance should be equal to the output impedance Zo of the pulse generator.
b. Load circuit
Test data is given in Table 11.
Fig 14. Input pulse deï¬nition and load circuit
Table 11. Test data
Test
Input
Control E, Sn
tPHL, tPLH
tPHZ, tPZH
tPLZ, tPZL
CPD
VI[1]
VCC
VCC
VCC
VCC
Switch Yn (Z)
VI
VCC
VCC
VCC
VCC
tr, tf
6 ns
6 ns
6 ns
6 ns
[1] For 74HCT4851: input voltage VI = 3.0 V.
Output
Switch Z (Yn)
CL
50 pF
50 pF
50 pF
0 pF
RL
-
10 kâ¦
10 kâ¦
-
S1 position
open
GND
VCC
open
74HC_HCT4851_2
Product data sheet
Rev. 02 â 2 September 2008
© NXP B.V. 2008. All rights reserved.
14 of 20
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