ICS932S422C Datasheet, PDF (5/21 Pages) Integrated Circuit Systems – PCIe Gen 2 main Clock for Intel-based Servers

Integrated
Circuit
Systems, Inc.
Single-ended Output Terminations
ICS932S422
ICS932S422C
SEPP Output Buffer
(Single Ended
Push Pull)
Zo
Rs
Test Load
Zo
Rs
CL=5pF
CL=5pF
Zo
Rs
SEPP Output Buffer
(Single Ended
Push Pull)
CL=5pF
The singled-ended outputs of the ICS 932S422 default to a drive strength of 2
loads. The REF clocks can be turned down to 1-load strength via the SMBus.
Suggested termination resistors are as follows for transmission lines with Zo =
50 ohms:
Single-ended outputs at 2-load strength (Power up default
for all single-ended outputs)
Driving 1 load, Rs = 33 ohms
Driving 2 loads, Rs = 7.5 ohms
Single-ended outputs at 1-load strength (REF clock only)
Driving 1 load, Rs = 22 ohms
1412A—12/10/07
5