VITESSE
SEMICONDUCTOR CORPORATION
Datasheet
VSC7126
Figure 6: TBC Timing Waveforms
1.0625 Gbits/sec Fibre
Channel Transceiver
T
H
TBC
V
ih(min)
V
il(max)
T
L
Table 3: Reference Clock Requirements
Parameters
FR
Description
Frequency Range
Min
50
Max
55
Units
MHz
Conditions
Range over which both transmit and receive
reference clocks on any link may be centered
Mean frequency offset between transmit and
receive reference clocks on one link
Low is measured from V
il
(max) to V
il
(max),
High is measured from V
ih
(min) to V
ih
(min)
Measured at 1.5V
Between V
il(max)
and V
ih(min)
Peak-to-peak total jitter for frequencies
between 50KHz and 7MHz
FO
T
L
,T
H
DC
T
RCR
,T
RCF
J
T
Frequency Offset
Pulse Width, Low / High
TBC duty cycle
TBC rise and fall time
Total jitter tolerance on
REFCLK
-200
4.5
30
----
----
200
----
70
2.0
120
ppm.
ns
%
ns.
ps
G52148-0, Rev. 4.3
3/4/99
©
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 7
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