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HD74HC688 Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 8-bit Magnitude Comparator | |||
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HD74HC688
Test Circuit
VCC
Input
Pulse Generator
Zout = 50 â¦
VCC
G
P1
Output
P7
P=Q
Q0
Q7
CL =
50 pF
Note : 1. CL includes probe and jig capacitance.
Waveforms
⢠Waveform â 1
P or Q
P=Q
⢠Waveform â 2
G
P=Q
tr
90%
50%
10%
tw
tPLH
90%
50%
tTLH
tf
90%
50%
10%
tPHL
90%
50%
10%
tTHL
tf
90%
50%
10%
tPHL
90%
50%
10%
tTHL
tr
10%
90%
50%
tPLH
50%
10%
90%
tTLH
VCC
0V
VOH
VOL
VCC
0V
VOH
VOL
Note : 1. Input waveform : PRR ⤠1 MHz, duty cycle 50%, tr ⤠6 ns, tf ⤠6 ns
Rev.2.00, Mar 30, 2006 page 5 of 7
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