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CS2501

Fractional-N Clock Multiplier
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CS2501 Overview

The CS2501 is a system-clocking device incorporating a programmable phase-locked loop (PLL). The hybrid analog/ digital PLL architecture comprises a delta-sigma fractional-N analog PLL and a digital frequency-locked loop (FLL). The CS2501 enables clock generation from a stable timing reference clock. The device can generate low-jitter clocks from a noisy clock reference at frequencies as low as 50 Hz. An internal oscillator can provide the timing reference clock, enabling a reduction in external component requirements.

The CS2501 can be configured using a control interface supporting I2C and SPI modes of operation. The CS2501 can be powered from a single 1.8 V or 3.3 V supply. The device combines high performance with low power consumption.

The CS2501 is available in commercial-grade 10-pin TSSOP package for operation from –40°C to +85°C. The device is also available in the AEC-Q100-qualified grade-2 package for operation from –40°C to +105°C.

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Product Features

  • High-performance analog/digital phase locked loop

  • Fractional clock multiplier and jitter reduction using hybrid analog/digital PLL

    • Generates low-jitter 6 to 75 MHz clock (CLK_OUT), synchronized to a 50 Hz to 30 MHz low-quality or intermittent frequency reference (CLK_IN)

  • Flexible timing reference source

    • External clock, external crystal or built-in oscillator

  • Great performance

    • High resolution PLL ratio (1 PPM)

    • 18 psRMS period jitter

    • 18 psRMS period jitter with internal reference

  • Glitchless clock output generated from intermittent input

  • I2C/SPI control port

  • Configurable auxiliary clock/status output

  • Minimal board space required

    • No external analog loop-filter components

  • Pin-to-pin, register map, and control compatible with CS2100 and CS2300

  • Single-supply operation at 1.8 V or 3.3 V

Parametric Specifications

Host InterfaceYes
Clock Multiplier / Jitter RemovalYes
Frequency Synth / Clock GeneratorNo
Output Frequency Range (MHz)6-75
Reference Frequency Range (MHz)8-75
Power Supply (V)1.8-3.3
One-Time ProgrammableNo
Target MarketAutomotive; Pro Audio
Package10 TSSOP

Design Resources

CAD DIAGRAM

CS2501-CZ

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CAD DIAGRAM

CS2501-CZR

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CAD DIAGRAM

CS2501-DZ

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CAD DIAGRAM

CS2501-DZR

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Evaluation Boards

  • CS2501 Clocking Evaluation Board (CDB2501-DC-SD)

    CS2501 Clocking Evaluation Board (CDB2501-DC-SD)

    The CDB2501-DC-SD evaluates the Cirrus Logic CS2501 high-performance clocking device. A daughter card for the CDBCLOCKING-MB motherboard, it supports a range of clock inputs and outputs and full device configuration.

    Order SampleUser Guide
  • CS2500, CS2501 and CS2600 Clocking Evaluation Board (CDBCLOCKING-MB)

    CS2500, CS2501 and CS2600 Clocking Evaluation Board (CDBCLOCKING-MB)

    The CDBCLOCKING-MB is the motherboard for evaluating the Cirrus Logic CS2500, CS2501 and CS2600 high-performance clocking devices. It supports a range of clock inputs and outputs and accepts the device-specific daughter cards below.

    Order SampleUser Guide

Software Packages

Loading CS2501_SCS_Package...

Timing Series

Pin-to-pin, register map, and control compatible

Pricing

Part Number

Container

Grade

Temp

Budgetary Price

Sample

CS2501-CZ
Tube
Commercial
–40 to +85°C
$
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4.51
1ku
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CS2501-DZ
Tube
Automotive
–40 to +105°C
$
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4.96
1ku
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1k Units
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CDB2501-DC-SD
Daughter Card
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$
168
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Board
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CDBCLOCKING-MB
Base Platform
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$
564
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Board
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*Prices are shown in USD and are non-binding, indicative pricing provided for reference only and are subject to change without notice.
Nothing on this page constitutes an offer for sale or other binding commitment. For bulk ordering, contact one of our distributors.

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