
932S890C
RD890 SYSTEM CLOCK FOR AMD-BASED SERVERS
IDT
RD890 SYSTEM CLOCK FOR AMD-BASED SERVERS
11
932S890C
REV D 052011
Clock Periods–Differential Outputs with Spread Spectrum Enabled
Clock Periods–Differential Outputs with Spread Spectrum Disabled
1 Clock
1us
0.1s
1us
1 Clock
Lg-
-SSC
-ppm error
0ppm
+ ppm error
+SSC
Lg+
Absolute
Period
Short-term
Average
Long-Term
Average
Period
Long-Term
Average
Short-term
Average
Period
Minimum
Absolute
Period
Minimum
Absolute
Period
Minimum
Absolute
Period
Nominal
Maxim um
Maximum
HTT/SRC 100
9.87456
9.99956
10.02456
10.02506
10.02556
10.05056
10.17556
ns
1,2
CPU 200
4.84978
4.99978
5.01228
5.01253
5.01278
5 .02528
5 .17528
ns
1,2
Notes
Symbol
Definition
Signal Name
Measurement Window
Units
1 Clock
1us
0.1s
1us
1 Clock
Lg-
-SSC
-ppm error
0ppm
+ ppm error
+SSC
Lg+
Absolute
Period
Short-term
Average
Long-Term
Average
Period
Long-Term
Average
Short-term
Average
Period
Minimum
Absolute
Period
Minimum
Absolute
Period
Minimum
Absolute
Period
Nominal
Maxim um
Maximum
SRC 100
9.87450
9.99950
10.00000
10.00050
10.12550
ns
1,2
SATA 100
9.87450
9.99950
10.00000
10.00050
10.12550
ns
1,2
CPU 200
4.84975
4.99975
5.00000
5.00025
5 .15025
ns
1,2
1Guaranteed by design and characterization, not 100% tested in production.
2 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz
Signal Name
Notes
Symbol
Definition
Units
Measurement Window