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.