84021 Data Sheet

260MHz, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER

84021 Rev E 9/23/15

12

©2015 Integrated Device Technology, Inc

Parameter Measurement Information, continued

Output Duty Cycle/Pulse Width/Period

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.

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 pullups or pulldowns; 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.

LVCMOS Outputs

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

there is no trace attached.

t

PERIOD

t

PW

t

PERIOD

odc =

V

DDO

2

x 100%

t

PW

Q[0:1]