MOTOROLA
Chapter 7. Electrical Specifications and Characteristics
7-11
AC Electrical Characteristics
7.3.3
Reference Clock Timing
The following section provides the reference clock timing for the MC92603. Figure 7-7
provides the reference clock timing diagram.
Figure 7-7. Reference Clock Timing Diagram
Table 7-11 provides the reference clock specifications.
Table 7-11. Reference Clock Specifications
Symbol
Characteristic
Min
Max
Unit
T
r
REF_CLK_P/N rise time
1
1
Measured between 10–90 percent points.
—
2.0
ns
T
f
REF_CLK_P/N fall time
1
—
2.0
ns
f
range
REF_CLK_P/N frequency range
2, 3
2
Measured between 50–50 percent points.
3
Full-speed operation (HSE = low).
95 135
MHz
f
range
REF_CLK_P/N frequency range
2, 4
4
Half-speed operation (HSE = high).
47.5 67.5
MHz
T
D
REF_CLK_P/N duty cycle
45
55
%
T
diff
REF_CLK_P to REF_CLK_N differential skew
—
1.0
ns
f
tol
REF_CLK_P/N frequency tolerance
–200
200
ppm
T
j
REF_CLK_P/N input jitter
5
5
Total peak-to-peak jitter.
—
80
ps
T
lock
PLL lock time
6
6
Lock time after compliant REF_CLK_P/N signal applied.
—
20,480 + 25
µ
s
bit-times
T
f
, T
r
T
diff
REF_CLK_P
REF_CLK_N
1/f
range
Summary of Contents for MC92603
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