Field Programmable Dual Output SS VersaClock Synthesizer

MDS 252 B

4

Revision 011606

Integrated Circuit Systems, Inc.

ICS252

down spread, the frequency can be modulated

between -0.25% to -4.0%.

Both output frequency banks will utilize identical spread

spectrum percentage deviations and modulation rates,

if a common VCO frequency can be identified.

Spread Spectrum Modulation Rate

The spread spectrum modulation frequency applied to

the output clock frequency may occur at a variety of

rates. For applications requiring the driving of

“down-circuit” PLLs, Zero Delay Buffers, or those

adhering to PCI standards, the spread spectrum

modulation rate should be set to 30-33 kHz. For other

applications, a 120 kHz modulation option is available.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the ICS252. These ratings, which

are standard values for ICS 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

Parameter

Condition

Min.

Typ.

Max.

Units

Supply Voltage, VDD

Referenced to GND

-0.5

7

V

Inputs

Referenced to GND

-0.5

VDD+ 0.5

V

Clock Outputs

Referenced to GND

-0.5

VDD+ 0.5

V

Storage Temperature

-65

150

°C

Soldering Temperature

Max 10 seconds

260

°C

Junction Temperature

125

°C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature (ICS252M)

0

+70

°C

Ambient Operating Temperature (ICS252MI)

-40

+85

°C

Power Supply Voltage (measured in respect to GND)

+3.135

+3.3

+3.465

V

Power Supply Ramp Time

4

ms