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SI52112-A1 Datasheet, PDF (5/20 Pages) Silicon Laboratories – PCI-EXPRESS GEN 1 DUAL OUTPUT CLOCK GENERATOR | |||
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Si52112-A1/A2
Table 3. AC Electrical Specifications
Parameter
Symbol
Test Condition
Crystal
Long-term Accuracy
Clock Input
LACC
Measured at VDD/2 differential
CLKIN Duty Cycle
CLKIN Rise and Fall Times
CLKIN Cycle-to-Cycle Jitter
CLKIN Long Term Jitter
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
DIFF Clocks
TDC
TR/TF
TCCJ
TLTJ
VIH
VIL
IIH
IIL
Measured at VDD/2
Measured between 0.2 VDD and
0.8 VDD
Measured at VDD/2
Measured at VDD/2
XIN/CLKIN pin
XIN/CLKIN pin
XIN/CLKIN pin, VIN = VDD
XIN/CLKIN pin, 0 < VIN <0.8
Duty Cycle
Skew
Output Frequency
Frequency Accuracy
Slew Rate
TDC
TSKEW
FOUT
FACC
tr/f2
Measured at 0 V differential
Measured at 0 V differential
VDD = 3.3 V
All output clocks
Measured differentially from
±150 mV
Cycle-to-Cycle Jitter
PCIe Gen 1 Pk-Pk Jitter
Crossing Point Voltage at 0.7 V
Swing
TCCJ
Pk-PkGEN1
VOX
Measured at 0 V differential
PCIe Gen 1
Voltage High
Voltage Low
Spread Range
Modulation Frequency
VHIGH
VLOW
SRNG
FMOD
Down Spread, -A2 only
-A2 only
Enable/Disable and Set-up
Clock Stabilization from Power-
up
TSTABLE
Stopclock Set-up Time
TSS
Note: Visit www.pcisig.com for complete PCIe specifications.
Min
â
45
0.5
â
â
2
â
â
â35
45
â
â
â
0.6
â
â
300
â
â0.3
â
30
â
10.0
Typ Max Unit
â
250 ppm
â
55
%
â
4.0 V/ns
â
250
ps
â
350
ps
â VDD+0.3 V
â
0.8
V
â
35
uA
â
â
uA
â
55
%
â
60
ps
100
â
MHz
â
100 ppm
â
4.0 V/ns
28
70
ps
24
86
ps
â
550 mV
â
1.15
V
â
â
V
â0.5
â
%
31.5
33 kHz
â
3
ms
â
â
ns
Rev 1.2
5
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