W311
REF Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Frequency, Actual
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Test Condition/Comments
Frequency generated by crystal oscillator
Measured from 0.4V to 2.4V
Min.
Typ.
Max. Unit
f
14.318
MHz
tR
0.5
0.5
45
–
–
–
–
–
2
2
V/ns
V/ns
%
tF
Measured from 2.4V to 0.4V
tD
Measured on rising and falling edge at 1.5V
55
3
fST
Frequency Stabilization
Assumes full supply voltage reached within 1 ms
ms
from Power-up (cold start) from power-up. Short cycles exist prior to
frequency stabilization.
Zo
AC Output Impedance
Average value during switching transition. Used
for determining series termination value.
–
40
–
:
48-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Frequency, Actual
Deviation from 48 MHz
PLL Ratio
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(48.008 – 48)/48
Min.
Typ.
Max. Unit
MHz
f
48.008
fD
+167
ppm
m/n
tR
(14.31818 MHz x 57/17 = 48.008 MHz)
Measured from 0.4V to 2.4V
57/17
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
0.5
0.5
45
–
–
–
–
–
2
2
V/ns
V/ns
%
tF
Measured from 2.4V to 0.4V
tD
Measured on rising and falling edge at 1.5V
55
3
fST
Frequency Stabilization
Assumes full supply voltage reached within 1 ms
ms
from Power-up (cold start) from power-up. Short cycles exist prior to
frequency stabilization.
Zo
AC Output Impedance
Average value during switching transition. Used
for determining series termination value.
–
40
–
:
24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Frequency, Actual
Deviation from 24 MHz
PLL Ratio
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(24.004 – 24)/24
Min.
Typ.
Max. Unit
MHz
f
24.004
fD
+167
ppm
m/n
tR
(14.31818 MHz x 57/34 = 24.004 MHz)
Measured from 0.4V to 2.4V
57/34
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
0.5
0.5
45
–
–
–
–
–
2
2
V/ns
V/ns
%
tF
Measured from 2.4V to 0.4V
tD
Measured on rising and falling edge at 1.5V
55
3
fST
Frequency Stabilization
Assumes full supply voltage reached within 1 ms
ms
from Power-up (cold start) from power-up. Short cycles exist prior to
frequency stabilization.
Zo
AC Output Impedance
Average value during switching transition. Used
for determining series termination value.
–
40
–a
:
Rev 1.0,November 25, 2006
Page 17 of 18
SPECTRALINEAR [ SPECTRALINEAR INC ]
