932SQ420D
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
Clock AC Tolerances
SRC,
NS_SAS,
CPU
NS_SRC
PCI
DOT96
48MHz
REF
PPM tolerance
Cycle to Cycle Jitter
Spread
ppm
ps
%
100
50
-0.50%
100
50
-0.50%
100
500
-0.50%
100
250
0
100
350
0.00%
100
1000
0.00%
Clock Periods – Outputs with Spread Spectrum Disabled
Measurement Window
1 Clock
1us
-SSC
0.1s
- ppm
0.1s
0.1s
+ ppm
1us
+SSC
Short-Term
Average
Max
1 Clock
Center
Freq.
MHz
SSC ON
-c2c jitter
AbsPer
Min
+c2c jitter Units Notes
AbsPer
Max
Short-Term Long-Term 0 ppm Period Long-Term
Average
Min
Average
Min
Nominal
Average
Max
100.00000
133.33333
9.94900
7.44925
9.99900
7.49925
10.00000
7.50000
10.00100
7.50075
10.05100
7.55075
ns
ns
1,2
1,2
CPU
SRC,
NS_SAS, 100.00000
NS_SRC
9.94900
9.99900
10.00000
10.00100
10.05100
ns
1,2
1,2
1,2
1,2
1,2
PCI
33.33333
96.00000
48.00000
14.31818
29.49700
10.16563
20.48125
69.78429
29.99700
10.41563
20.83125
69.83429
30.00000
10.41667
20.83333
69.84128
30.00300
10.41771
20.83542
69.84826
30.50300
10.66771
21.18542
69.89826
ns
ns
ns
ns
DOT96
48MHz
REF
Clock Periods – Outputs with Spread Spectrum Enabled
Measurement Window
1 Clock
1us
-SSC
0.1s
- ppm
0.1s
0.1s
+ ppm
1us
+SSC
Short-Term
Average
1 Clock
Center
Freq.
MHz
SSC ON
-c2c jitter
AbsPer
Min
+c2c jitter Units Notes
AbsPer
Max
Short-Term Long-Term 0 ppm Period Long-Term
Average
Average
Min
Nominal
Average
Max
Min
Max
99.75
133.00
33.25
99.75
9.94906
7.44930
29.49718
9.94906
9.99906
7.49930
29.99718
9.99906
10.02406
7.51805
30.07218
10.02406
10.02506
7.51880
30.07519
10.02506
10.02607
7.51955
30.07820
10.02607
10.05107
7.53830
30.15320
10.05107
10.10107
7.58830
30.65320
10.10107
ns
ns
ns
ns
1,2
1,2
1,2
1,2
CPU
PCI
SRC
1Guaranteed by design and characterization, not 100% tested in production.
2 All Long Term Accuracy specifications are guaranteed with the assumption that the REF output is tuned to exactly 14.31818MHz.
IDT® PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
14
932SQ420D
REV H 042012
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
