ICS8402I

350MHZ, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER

IDT™ / ICS™ LVCMOS/LVTTL FREQUENCY SYNTHESIZER

11

ICS8402AYI REV. A OCTOBER 16, 2007

Parameter Measurement Information, continued

Output Rise/Fall Time

Application Information

Power Supply Filtering Technique

As in any high speed analog circuitry, the power supply pins are

vulnerable to random noise. The ICS8402I provides separate

power supplies to isolate any high switching noise from the outputs

connected to the power supply plane through vias, and bypass

capacitors should be used for each pin. To achieve optimum jitter

performance, power supply isolation is required. Figure 2

illustrates how a 10

Ω resistor along with a 10µF and a 0.01µF

Figure 2. Power Supply Filtering

Clock

Outputs

20%

80%

80%

20%

3.3V

10

Ω

10µF

.01µF

.01µF