Product details

Function Spread-spectrum clock generator Number of outputs 1 Output frequency (Max) (MHz) 108 Core supply voltage (V) 3.3 Output supply voltage (V) 3.3 Input type XTAL Output type LVCMOS Operating temperature range (C) -40 to 85 Features Multiplier or divider, Spread-spectrum clocking (SSC), Pin programmable Rating Catalog
Function Spread-spectrum clock generator Number of outputs 1 Output frequency (Max) (MHz) 108 Core supply voltage (V) 3.3 Output supply voltage (V) 3.3 Input type XTAL Output type LVCMOS Operating temperature range (C) -40 to 85 Features Multiplier or divider, Spread-spectrum clocking (SSC), Pin programmable Rating Catalog
TSSOP (PW) 8 19 mm² 3 x 6.4
  • Part of a Family of Easy to use Clock Generator Devices With Optional SSC
  • Crystal Oscillator With Integrated Crystal Capacitors, 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
  • 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 Crystal Oscillator with the possibility of EMI reduction through Spread Spectrum Clocking
  • Part of a Family of Easy to use Clock Generator Devices With Optional SSC
  • Crystal Oscillator With Integrated Crystal Capacitors, 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
  • 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 Crystal Oscillator with the possibility of EMI reduction through Spread Spectrum Clocking

The CDCS502 is a spread spectrum capable, fundamental mode crystal oscillator with selectable frequency multiplication.

It features an advanced gain controlled fundamental mode crystal oscillator stage with a built-in load capacitance of 10pF. This oscillator stage accepts crystals from 8MHz to 32MHz with an ESR of up to 180Ω. The stage can be used with crystals with power dissipation of 50µW and up.

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 an triangular modulation.

By this, the device can generate output frequencies between 8MHz and 108MHz with or without SSC from a fundamental mode crystal.

In x1 Mode with an SSC amount of 0%, the device works as a standard crystal oscillator and does not make use of the built in PLL.

The CDCS502 operates in 3.3V environment.

It is characterized for operation from -40°C to 85°C. It is offered in an 8 Pin TSSOP package.

The CDCS502 is a spread spectrum capable, fundamental mode crystal oscillator with selectable frequency multiplication.

It features an advanced gain controlled fundamental mode crystal oscillator stage with a built-in load capacitance of 10pF. This oscillator stage accepts crystals from 8MHz to 32MHz with an ESR of up to 180Ω. The stage can be used with crystals with power dissipation of 50µW and up.

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 an triangular modulation.

By this, the device can generate output frequencies between 8MHz and 108MHz with or without SSC from a fundamental mode crystal.

In x1 Mode with an SSC amount of 0%, the device works as a standard crystal oscillator and does not make use of the built in PLL.

The CDCS502 operates in 3.3V environment.

It is characterized for operation from -40°C to 85°C. It is offered in an 8 Pin TSSOP package.

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CDCEL913 ACTIVE Programmable 1-PLL VCXO clock synthesizer with 1.8-V LVCMOS outputs CDCS502 is a clock buffer with SSC. CDCEL913 has similar functionality but provides frequency synthesis with 3 fan outs and integrated EEPROM working at 1.8V.

Technical documentation

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Type Title Date
* Data sheet Crystal Oscillator / Clock Generator with optional SSC datasheet 19 Dec 2008
Technical article How to select an optimal clocking solution for your FPGA-based design 09 Dec 2015
Technical article Clocking sampled systems to minimize jitter 31 Jul 2014
Technical article Timing is Everything: How to optimize clock distribution in PCIe applications 28 Mar 2014
Application note Spread Spectrum Clocking Using the CDCS502/503 19 Aug 2009
User guide CDCS502 Performance Evaluation Module 05 May 2009

Design & development

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Evaluation board

CDCM9102EVM — CDCM9102 Evaluation Module

CDCM9102EVM is the evaluation module for CDCM9102, a low-jitter clock generator designed to provide reference clocks for communications standards such as PCI Express. The device is easy to configure and use. The CDCM9102 provides two 100-MHz differential clock ports. The output types supported for (...)

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Evaluation board

CDCS502PERF-EVM — CDCS502 Performance Evaluation Module

The CDCS502 is a spread spectrum capable, fundamental mode crystal oscillator with electable frequency multiplication. The crystal frequency is processed by a PLL, whose output frequency is either equal to the input frequency or multiplied by a factor of 4. The PLL is also able to spread the (...)
In stock
Limit: 2
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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TSSOP (PW) 8 View options

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