Document Number: 001-90233 Rev. *K Page 10 of 25
AC Electrical Specifications for LVPECL, LVDS, CML Outputs
(V
DD
= 3.3 V and 2.5 V for LVPECL, with common mode current, and V
DD
= 3.3 V, 2.5 V, and 1.8 V for LVDS and CML outputs)
Parameter
[9]
Description Details/Conditions Min Typ Max Unit
f
OUT
Clock Output Frequency
LVPECL, CML, LVDS output
standards
15 – 2100 MHz
t
RF
LVPECL Output Rise/Fall Time
20% to 80% of AC levels.
Measured at 156.25 MHz for PECL
outputs.
– – 350 ps
CML Output Rise/Fall Time
20% to 80% of AC levels.
Measured at 156.25 MHz for CML
outputs.
– – 350 ps
LVDS Output Rise/Fall Time
20% to 80% of AC levels.
Measured at 156.25 MHz for LVDS
outputs.
– – 350 ps
t
ODC
Output Duty Cycle
Measured at differential 50% level,
156.25 MHz.
45 50 55 %
V
P
LVDS output differential peak 15 MHz to 700 MHz 247 – 454 mV
V
P
LVDS output differential peak 700 MHz to 2100 MHz 150 – 454 mV
'V
P
Change in VP between
complementary output states
– – – 50 mV
V
P
LVPECL output differential peak
f
OUT
= 15 MHz to 325 MHz 450 – – mV
V
P
f
OUT
= 325 MHz to 700 MHz 350 – – mV
V
P
f
OUT
= 700 MHz to 2100 MHz 250 – – mv
V
P
CML output differential peak f
OUT
= 15 MHz to 700 MHz 250 – 600 mV
V
P
CML output differential peak f
OUT
= 700 MHz to 2100 MHz 200 – 600 mV
t
CCJ
Cycle to Cycle Jitter
pk, measured at differential signal,
156.25 MHz, over 10k cycles,
100 MHz–130 MHz crystal
– – 50 ps
t
PJ
Period Jitter
pk-pk, measured at differential
signal, 156.25 MHz, over 10k
cycles, 100 MHz–130 MHz crystal
– – 50 ps
J
RMS
RMS Phase Jitter
f
OUT
= 156.25 MHz, 12 kHz–20
MHz offset, non-VCXO mode
– 150 250 fs
Non-VCXO Mode
PN1k Phase Noise, 1 kHz Offset
100-130 MHz crystal reference,
f
OUT
= 156.25 MHz
– – -113
dBc/
Hz
PN10k Phase Noise, 10 kHz Offset
100-130 MHz crystal reference,
f
OUT
= 156.25 MHz
– – -127
dBc/
Hz
PN100k Phase Noise, 100 kHz Offset
100-130 MHz crystal reference,
f
OUT
= 156.25 MHz
– – -135
dBc/
Hz
PN1M Phase Noise, 1MHz Offset
100-130 MHz crystal reference,
f
OUT
= 156.25 MHz
– – -144
dBc/
Hz
PN10M Phase Noise, 10 MHz Offset
100-130MHz crystal reference,
f
OUT
= 156.25 MHz
– – –152
dBc/
Hz
PN-SPUR Spur
At frequency offsets equal to and
greater than the update rate of the
PLL
– – –65
dBc/
Hz
Note
9. Parameters are guaranteed by design and characterization. Not 100% tested in production.
