ICS650-41

SPREAD SPECTRUM CLOCK SYNTHESIZER

CLOCK SYNTHESIZER

IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER

4

ICS650-41

REV G 102709

1) The 0.01µF decoupling capacitors should be mounted on

the component side of the board as close to the VDD pin as

possible. No vias should be used between the decoupling

capacitors and VDD pins. The PCB trace to VDD pins

should be kept as short as possible, as should the PCB

trace to the ground via.

2) The external crystal should be mounted just next to the

device with short traces. The X1 and X2 traces should not

be routed next to each other with minimum spaces, instead

they should be separated and away from other traces.

3) To minimize EMI, the 33

Ω series termination resistor (if

needed) should be placed close to the clock output.

4) An optimum layout is one with all components on the

same side of the board, minimizing vias through other signal

layers. Other signal traces should be routed away from the

ICS650-41. This includes signal traces just underneath the

device, or on layers adjacent to the ground plane layer used

by the device.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the ICS650-41. These ratings, which are

standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these

or any other conditions above those indicated in the operational sections of the specifications is not implied.

Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical

parameters are guaranteed only over the recommended operating temperature range.

Recommended Operation Conditions

Item

Rating

Supply Voltage, VDD

7 V

All Inputs and Outputs

-0.5 V to VDD+0.5 V

Ambient Operating Temperature

0 to +85

° C

Storage Temperature

-65 to +150

° C

Junction Temperature

125

° C

Soldering Temperature (max. of 10 seconds)

260

° C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature

0

–

+85

° C

Power Supply Voltage (measured in respect to GND)

+3.135

+3.3

+3.465

V

Power Supply Voltage (VDDO)

+2.375

+2.5

+2.625

V

Power Supply Ramp Time, Figure 4

4

ms