844003 Datasheet, PDF (10/18 Pages) Integrated Device Technology – FemtoClock Crystal-to-3.3V LVDS Frequency Synthesizer

844003 Datasheet
Applications Information
Recommendations for Unused Input and Output Pins
Inputs:
Outputs:
Crystal Input:
For applications not requiring the use of the crystal oscillator input,
both XTAL_IN and XTAL_OUT can be left floating. Though not
required, but for additional protection, a 1k resistor can be tied from
XTAL_IN to ground.
TEST_CLK Input:
For applications not requiring the use of the test clock, it can be left
floating. Though not required, but for additional protection, a 1k
resistor can be tied from the TEST_CLK to ground.
LVCMOS Control Pins:
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional protection.
A 1k resistor can be used.
LVDS
All unused LVDS output pairs can be either left floating or terminated
with 100 across. If they are left floating, we recommend that there
is no trace attached.
©2016 Integrated Device Technology, Inc.
10
January 29, 2016