COM90C66 Datasheet, PDF (59/76 Pages) SMSC Corporation – ARCNET Controller/Transceiver with AT Interface and On-Chip RAM

XTAL1
CLK
t1
t2
t3
Parameter
t1 Input Clock High Time
t2 Input Clock Low Time
t3 Input Clock Period
f Input Clock Frequency
min typ max units
20
nS
20
nS
50
125 nS
8
20 MHz
FIGURE 24 – TTL INPUT CLOCK TIMING ON XTAL1 PIN
t1
t2
t3
Parameter
t1 Output Clock High Time
t2 Output Clock Low Time
t3 Output Clock Period
f Output Clock Frequency
min typ max units
100
nS
100
nS
200
nS
5
MHz
FIGURE 25 - CLK OUTPUT TIMING
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