ics932s421b Integrated Device Technology, ics932s421b Datasheet - Page 5

• Manufacturer Part Number: ics932s421b
• Description: Pcie Gen 2 And Qpi Clock For Intel-based Servers
• Manufacturer: Integrated Device Technology

Single-ended Output Terminations
1340D—11/20/08
Integrated
Circuit
Systems, Inc.
Single-ended outputs at 2-load strength (Power up default
for all single-ended outputs)
Single-ended outputs at 1-load strength (REF clock only)
The singled-ended outputs of the ICS 932S421B 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:
SEPP Output Buffer
SEPP Output Buffer
(Single Ended
(Single Ended
ICS932S421B
Push Pull)
Push Pull)
Rs
Rs
Rs
5
Test Load
Zo
Zo
Zo
Driving 1 load, Rs = 33 ohms
Driving 2 loads, Rs = 7.5 ohms
Driving 1 load, Rs = 22 ohms
CL=5pF
CL=5pF
CL=5pF
ICS932S421B