Overview

The RC22504A is a small, low-power timing component designed to be placed immediately adjacent to a PHY, switch, ASIC or FPGA that requires several reference clocks with jitter performance less than 100fs (max). The RC22504A can act as a frequency synthesizer to locally generate the reference clock or as a DCO for frequency margining or OTN clock applications.

RC22504A - Block Diagram
RC22504A - Pin Assignment
RC22504A - Block Diagram
RC22504A - Pin Assignment
  • Jitter below 100fs RMS maximum (10Hz to 20MHz)
  • PLL core consists of fractional-feedback Analog PLL (APLL)
    • Operates from a 25MHz to 80MHz crystal or XO
    • APLL frequency independent of input / crystal frequency
    • Operates as a frequency synthesizer or Digitally Controlled Oscillator (DCO)
    • DCO has tuning granularity of < 1ppb 
  • Programmable status output
  • 4 differential / 8 LVCMOS outputs
    • Any frequency from 10MHz to 1GHz (180MHz for LVCMOS)
    • Programmable output buffer supports HCSL (DCcoupled), LVDS/LVPECL/CML (AC-coupled) or two LVCMOS
    • Differential output swing is selectable: 400mV to 800mV
    • Output clock phase individually adjustable in 100ps steps
    • Output Enable input with programmable effect
  • Supports up to 1MHz I2C or up to 20MHz SPI serial processor port
  • Can configure itself automatically after reset via internal customer-definable One-Time Programmable (OTP) memory with up to four different configurations
  • 4 × 4 mm 24-VFQFPN package

Documentation

Title Type Date
RC22504A Datasheet
PDF2.47 MB
Datasheet
AN-827 Application Relevance of Clock Jitter
PDF1.99 MB
Application Note
Frequency Margining with FemtoClock 2
PDF129 KB
Application Note
How to Make 1.2V LVCMOS from 1.8V LVCMOS Output
PDF256 KB
Application Note
FemtoClock2 Python Driver Setup
PDF433 KB
Application Note
RC22504A and RC32504A: Using FemtoClock 2 for High Bandwidth Jitter Attenuation
PDF353 KB
Application Note
AN-831 The Crystal Load curve
PDF395 KB
Application Note
AN-844 Termination - AC Coupling Clock Receivers
PDF170 KB
Application Note
AN-842 Thermal Considerations in Package Design and Selection
PDF495 KB
Application Note
AN-840 Jitter Specifications for Timing Signals
PDF442 KB
Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF115 KB
Application Note
AN-839 RMS Phase Jitter
PDF233 KB
Application Note
AN-832 Timing Budget and Accuracy
PDF131 KB
Application Note
AN-833 Differential Input Self Oscillation Prevention
PDF180 KB
Application Note
AN-835 Differential Input with VCMR being VIH Referenced
PDF160 KB
Application Note
AN-836 Differential Input to Accept Single-ended Levels
PDF120 KB
Application Note
AN-830 Quartz Crystal Drive Level
PDF143 KB
Application Note
AN-815 Understanding Jitter Units
PDF565 KB
Application Note
AN-802 Crystal-Measuring Oscillator Negative Resistance
PDF136 KB
Application Note
AN-801 Crystal-High Drive Level
PDF202 KB
Application Note
AN-805 Recommended Ferrite Beads
PDF121 KB
Application Note
AN-806 Power Supply Noise Rejection
PDF438 KB
Application Note
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products
PDF108 KB
Application Note
FemtoClock2 Debug Guide
PDF80 KB
Guide
Renesas IC Toolbox Software Manual
PDF1.53 MB
Manual - Software
FemtoClock®2 GUI User Guide
PDF1.22 MB
Manual - Software
RC22504A Schematic Checklist
XLSX482 KB
Other
Timing Solutions Products Overview
PDF872 KB
Overview
IDT Clock Generation Overview
PDF1.83 MB
Overview

Design & Development

Software & Tools

Renesas IC Toolbox (RICBox)The Renesas IC Toolbox (RICBox) software platform enables customers to configure Renesas devices on evaluation kits when attached to the computer running the software. Software Package Renesas

Boards & Kits

RC32504A_RC22504A - Evaluation Board

RC32504A-EVK

Evaluation
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FemtoClock™ 2 Evaluation Kit

This is the evaluation kit for the RC32504A and RC22504A point-of-use jitter attenuator and clock generators.  The board comes populated with an RC32504A device. The...

Featured Documents:
RC32504A/RC22504A Evaluation Board User Manual

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models

Models

Title Type Date
RC22504A IBIS Model
ZIP28 KB
Model - IBIS

Product Options

This device is factory-configurable. Try the Custom Part Configuration Utility.
    Processing table
    Part Number
    Pkg. Type
    Lead Count (#)
    Temp. Range
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    RC22504A000GNK#BB0
    play_circleActive
    memory
    view_in_ar
    Samples Available
    		 VFQFPN 24 -40 to 85°C I Yes Tray Get Samples,
    RC22504A000GNK#KB0
    play_circleActive
    memory
    view_in_ar
    		VFQFPN 24 -40 to 85°C I Yes Reel
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    Support

    Contact Technical SupportCustomize PartGet SamplesClocks & Timing FAQsClocks & Timing ForumClock Tree Design ServiceContact a Sales Representative

    Videos & Training

    Lab on the Cloud Demo for Femtoclock®2 Ultra-Low Phase Noise Synthesizer and Jitter Attenuator

    Demonstration of Renesas’ Lab on the Cloud virtual environment for Femtoclock®2 ultra-low phase noise synthesizer and jitter attenuator.

    Video List

    News & Blog Posts

    Selecting the Best Device for Converter Clocking Applications Blog Post Feb 1, 2022
    Benefits of a Point-of-Use Clock for Jitter Optimization Blog Post Apr 27, 2021
    Faster Timing Design and Accurate Performance Testing with Jitter Measurement Utility Blog Post Jun 14, 2019
    IDT's Latest Timing Products Deliver Industry-leading Phase Noise for 100G and 400G Applications News
    New IDT 12-Output Clock Generator Delivers Best-In-Class Jitter Performance for Today’s Demanding Applications News