Overview
Description
The RC323xxA (RC32308A and RC32312A) is a high-performance, small form factor, low-power jitter attenuator with network synchronization capabilities, belonging to Renesas' high-performance FemtoClock™ 3 family. It supports Synchronous Ethernet (SyncE) for network-based synchronization and outputs ultra-low jitter clocks that can directly synchronize SerDes running at up to 112G pulse amplitude modulation (PAM), as well as CPRI/OBSAI, SONET/SDH, and ADC/DAC. This makes it an excellent choice for 100G/200G/400G/800G telecom switch line cards, fabric cards, wireline infrastructure, data center equipment, and instrumentation applications. It allows locking to external reference clocks or free-run crystals/oscillators and supports hitless reference switching between redundant timing sources. The device is versatile, supporting timing channels for SyncE clock generation, jitter attenuation, and precise phase skew management for input-to-input, input-to-output, and output-to-output configurations.
Features
- Ultra-low jitter performance: Achieve exceptional precision with jitter performance as low as 70fs at 312.5MHz within a wide 12kHz to 20MHz integration range in jitter attenuator mode
- Versatile power supply options: Operate the device with ease using a single 1.8V power supply while ensuring compatibility with a 3.3V level interface at SCL/SDA pin if the VDDD33_SERIAL is 3.3V
- SyncE support: Seamlessly integrate with SyncE technology for enhanced synchronization capabilities
- DCO mode support: Leverage the benefits of the DCO mode for added flexibility and efficiency
- Configurable startup options: Load configurations at startup effortlessly with the support of an external EEPROM, streamlining your setup process
- Flexible communication interfaces: Choose between SPI or I2C communication protocols for seamless device integration
- Multiple OTP configurations: Benefit from up to 4 OTP configurations for startup
- Clock input monitoring: Monitor clock inputs with precision, ensuring reliable and stable performance
- Phase slope limit (ns/s): Support smooth phase adjust under DPLL control
- Wide loop bandwidth: Enjoy the flexibility of adjusting the loop bandwidth from 0.5Hz to 18kHz, catering to various application needs
- Combo mode support: Flexible frequency support
Comparison
Applications
Design & Development
Software & Tools
Software & Tools
| Software title
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Software type
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Company
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|---|---|---|
| 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.
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Software Package | Renesas |
| Programmable Clocks Live Bench Measurement This powerful, cloud-based tool gives you 24/7 access to live phase noise measurements for Renesas’ flagship clock families, including VersaClock®, FemtoClock™, and ProXO.
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Solution Toolkit | Renesas |
2 items
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Boards & Kits
Evaluation
RC32308A-EVK
Active
FemtoClock™ 3 8-Output Jitter Attenuator and Multi-Frequency Clock Synthesizer Evaluation Kit
This is the evaluation kit for the RC32308A FemtoClock™ 3 jitter attenuator and clock generator. The RC32308A provides one independent timing channel that can be configured as digital PLLs (DPLLs) or as digitally controlled oscillators (DCOs) and with up to four independent frequency domains...
Recommended Documents:
Evaluation
RC32312A-EVK
Active
FemtoClock™ 3 12-Output Jitter Attenuator and Multi-Frequency Clock Synthesizer Evaluation Kit
This RC32312A-EVK evaluation kit is used to evaluate the RC32312A FemtoClock™ 3 jitter attenuator and clock generator. The RC32312A provides one independent timing channel that can be configured as digital PLLs (DPLLs) or as digitally controlled oscillators (DCOs) and with up to four independent...
Recommended Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
Applied Filters:
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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RC32312A000GN1#BB0 Channel to Channel Time delay error is in less than Pico seconds
Hi Team,I have a requirement, I need use this Synthesizer chip for one application with a requirement of channel to channel time delay error should be less than 3 pico second. is it achievable or sugguest some part which can be acheived.
Mar 6, 2025 -
RC32312A Evalkit User manual
Hi Team We are using RC32312A in one of our product , Can you provide us user manual of R32312A Eval kit , Below are details of evalkit RC32312A APPS Rev B HW # 10032
Aug 28, 2023 -
Clock Generator IC's
Dear Team, In my design, I need a clock generator with programmable delay capabilities. The clock generator should be able to generate any two distinct frequencies within the range of 312.5 MHz to 500 MHz, with a specific delay between the two frequencies. If there is an IC that ...
Nov 5, 2024
FAQs
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How to configure Direct-Coupled HCSL termination on the RC32308A or RC32312A?
For HCSL receivers, RC38208/RC38108 clock outputs should be configured for HCSL, and the devices should be directly coupled. The RC38208/RC38108 supports several programmable HCSL voltage swing options. Figure 10 shows an HCSL driver directly coupled with an HCSL receiver and configured for internal source termination. The ...
Apr 18, 2024 -
How to configure Direct-Coupled LVDS termination on the RC32308A or RC32312A?
For LVDS receivers, RC32308A or RC32312A clock outputs should be configured for LVDS and should be directly coupled. The RC32308A / RC32312A supports several programmable LVDS voltage swing and common mode options. Figure 12 shows an LVDS driver directly coupled with an LVDS receiver. The recommended value for the termination ...
Apr 18, 2024 -
How would I overdrive the crystal input for the RC32308A or RC32312A?
When overdriving the crystal interface, the XOUT pin is left to float and the XIN input is overdriven by an AC coupled LVCMOS driver, or by one side of an AC coupled differential driver. The XIN pin is internally biased to .6V. The voltage swing on XIN should be between ...
Apr 18, 2024
Videos & Training
Introducing the industry's lowest jitter 25fs RMS clock generator and jitter attenuator.
News & Blog Posts
Blog Post
Jul 17, 2025
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News
Apr 18, 2024
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Blog Post
Apr 27, 2021
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