1FEATURES

· Part of a Family of Easy to use Clock

Generator Devices With Optional SSC

· Clock Multiplier With Selectable Output

Frequency and Selectable SSC

· SSC Controllable via 2 External Pins

– ±0%, ±0.5%, ±1%, ±2% Center Spread

· Frequency Multiplication Selectable Between

x1 or x4 With One External Control Pin

· Output Disable via Control Pin

· Single 3.3V Device Power Supply

· Wide Temperature Range –40°C to 85°C

· Low Space Consumption by 8 Pin TSSOP

Package

APPLICATIONS

· Consumer and Industrial Applications

requiring EMI reduction through Spread

Spectrum Clocking and/ or Clock

Multiplication

DESCRIPTION

The CDCS503 is a spread spectrum capable, LVCMOS Input Clock Buffer with selectable frequency

multiplication.

It shares major functionality with the CDCS502 but utilizes a LVCMOS input stage instead of the crystal input

stage of the CDCS502. Also an Output Enable pin has been added to the CDCS503.

The device accepts a 3.3V LVCMOS signal at the input.

The input signal is processed by a PLL, whose output frequency is either equal to the input frequency or

multiplied by the factor of 4.

The PLL is also able to spread the clock signal by ±0%, ±0.5%, ±1% or ±2% centered around the output clock

frequency with a triangular modulation.

By this, the device can generate output frequencies between 8MHz and 108MHz with or without SSC.

A separate control pin can be used to enable or disable the output. The CDCS503 operates in 3.3V environment.

It is characterized for operation from –40°C to 85°C, and available in an 8-pin TSSOP package.