
7
INDUSTRIALTEMPERATURERANGE
IDT5T940
PRECISION CLOCKGENERATOROC-192APPLICATIONS
INPUT TIMING REQUIREMENTS
Symbol
Parameter
Min.
Typ.
Max.
Unit
REFH
Input Reference Clock Duty Cycle
40
50
60
%
FREF
InputReferenceClockRange
19.44
—
666.52
MHz
REFTOL
InputReferenceClockFrequencyTolerance
-100
—
100
ppm
FCLKIN
Clock in Frequency Range
19.44
—
666.52
MHz
CLKINH
Clock in Duty Cycle
40
50
60
%
tAQ
Acquisition Time from Return of Valid CLKIN
—
60
150
us
LOCKTOL
FrequencyToleranceforLOCK
-600
±450
600
ppm
tJIT(TOL)
TolerancetoInputJitter
GR-253 Sect. 5.6.2.2
Symbol
Parameter
Min.
Typ.
Max.
Unit
SELmode = LOW
155.52
—
166.63
QOUT
MultipliedClockOutputFrequency
SELmode = MID
155.52
—
666.52
MHz
SELmode = HIGH
622.08
—
666.52
QREG
RegeneratedClockOutputFrequency
19.44
—
666.52
MHz
CLKIN
Input Clock Frequency
19.44
—
667
MHz
tR
OutputRiseTime
LVPECL
—
150
—
ps
LVDS
—
100
—
tF
OutputFallTime
LVPECL
—
150
—
ps
LVDS
—
100
—
tSK
Skew between QOUT and QREG
—
10
20
ps
PLLBW
PLLBandwidthSetting
65
80
120
KHz
tP
JitterTransferPeaking
——
0.1
dB
tJ
JitterGeneration(1)
Output Frequency = 622MHz - 666.5MHz
—
0.3
0.65
ps (RMS)
(with 50KHz to 80MHz band pass filter)
Output Frequency = 155.5MHz - 166.6MHz
—
1
2
tDUTY
Output Duty Cycle
45
—
55
%
AC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (OC-192)
NOTE:
1. All input frequencies and PLLBW[1:0] permitted by PLL Bandwidth Selection table.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE FOR LVDS
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
InputCharacteristics
IIN
Input Current (CLKIN, REFIN)
VDD = 3.465V
-20
—
+20
μA
VCM
CommonModeInputVoltageRange(1)
0.9
—
VDD - 0.05
V
VDIF
DifferentialVoltageRequiredtoToggleInput
100
——
mV
OutputCharacteristics
VOT(+)
DifferentialOutputVoltagefortheTRUEBinaryState
247
—
454
mV
VOT(-)
DifferentialOutputVoltagefortheFALSEBinaryState
-247
—
-454
mV
ΔVOT
Change in VOTBetweenComplementaryOutputStates
——
50
mV
VOS
OutputCommonModeVoltage(OffsetVoltage)
1.125
1.2
1.375
V
ΔVOS
Change in VOSBetweenComplementaryOutputStates
——
50
mV
IOS
OutputsShortCircuitCurrent
VOUT(+) and VOUT(-) = 0V
—
924
mA
IOSD
DifferentialOutputsShortCircuitCurrent
VOUT(+) = VOUT(-)
—
612
mA
NOTE:
1. Not to exceed VDD - 0.05V.