
IDT
Eighteen Output Differential Buffer w/2 input mux for PCIe Gen1/2/3
1678D—03/23/12
9EX21831
Eighteen Output Differential Buffer w/2 input mux for PCIe Gen1/2/3
9
Clock Periods Differential Outputs with Spread Spectrum Enabled
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
Maximum
DIF
DIF 100
9.87400
9.99900
10.00000
10.00100
10.05130
10.17630
ns
1,2,3
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
Maximum
DIF
DIF 100
9.87400
9.99900
10.00000
10.00100
10.17630
ns
1,2,3
1Guaranteed by design and characterization, not 100% tested in production.
3 Driven by SRC output of main clock, PLL or Bypass mode
Notes
Symbol
Definition
Measurement
Window
Units
2 All Long Term Accuracy specifications are guaranteed with the assumption that the input clock complies with
CK410B+/CK420BQ accuracy requirements. The 9EX21831 itself does not contribute to ppm error.
Notes
Symbol
Definition
Measurement
Window
Units