ICS650-40

ETHERNET SWITCH CLOCK SOURCE

CLOCK SYNTHESIZER

IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE

3

ICS650-40

REV E 051310

External Components

A minimum number of external components are required for proper operation. Decoupling capacitors of 0.01

µF

should be connected between VDD and GND pairs. The capacitors should be placed between pins VDD and GND,

and VDDO and GND, as close to the device as possible. A 33

Ω series terminating resistor should be used on each

clock output if the trace is longer than 1 inch. A 25 MHz fundamental mode parallel resonant crystal should be used

with CL=18 pF.

On chip capacitors. On Chip capacitors are used for a 18 pF load crystal. Small 2 to 3 pf trimming capacitors are

used from pins X1 to ground and X2 to ground to optimize the initial accuracy.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the ICS650-40. 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 +70

° C

Storage Temperature

-65 to +150

° C

Junction Temperature

125

° C

Soldering Temperature

260

° C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature

0

+70

° C

Power Supply Voltage (measured in respect to GND)

+3.15

+3.45

V