ICS843034 datasheet(16/31 Pages) RENESAS

16 / 31 page

December 2, 2015

843034 DATA SHEET

Applications Information

Recommendations for Unused Input and Output Pins

Inputs:

Crystal Inputs

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.

CLK/nCLK Inputs

For applications not requiring the use of the differential input, both

CLK and nCLK can be left floating. Though not required, but for

additional protection, a 1k

 resistor can be tied from CLK 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 pullup or pulldown resistors; additional

resistance is not required but can be added for additional protection.

A 1k

 resistor can be used.

Outputs:

TEST Output

The unused TEST output can be left floating. There should be no

trace attached.

REF_OUT Output

The unused REF_OUT output can be left floating. There should be

no trace attached.

LVPECL Outputs

All unused LVPECL outputs can be left floating. We recommend that

there is no trace attached. Both sides of the differential output pair

should either be left floating or terminated.

ICS843034 Datasheet(PDF) 16 Page - Renesas Technology Corp