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Renesas RC31012B000GNA#KB0
- Part No.:
- RC31012B000GNA#KB0
- Manufacturer:
- Renesas
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
RC31012B000GNA#KB0.pdf
- Description:
- IC CLOCK JITTER PCIE 48VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,074
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Product details
Overview
RC31012B000GNA#KB0 from Renesas Electronics is a high-performance programmable jitter attenuator with dual-domain DPLL architecture for network synchronization and converter timing. It delivers 169fs RMS phase jitter at 156.25MHz, supports JEDEC JESD204B/C and SyncE, and provides 12 differential output pairs (24 single-ended) in a 6×6 mm 48-QFN package. It is deployed in 400G Ethernet PHYs, telecom time slave clocks, and data center switch ASICs.
For engineers reviewing the RC31012B000GNA#KB0 datasheet, RC31012B000GNA#KB0 pinout, RC31012B000GNA#KB0 application, or RC31012B000GNA#KB0 equivalent, key selection criteria include its ITU-T G.8262/G.8262.1 compliance, programmable loop bandwidth (0.1Hz–12kHz), LVDS/LP-HCSL/LVCMOS output flexibility, integrated crystal option, and support for PCIe Gen7 common clock jitter (8fs RMS).
Technical Context
The RC31012B000GNA#KB0 integrates a dual-loop architecture: a high-bandwidth APLL for low-additive jitter synthesis and a wideband DPLL for precise network synchronization tracking (SyncE, T-TSC). Its input stage accepts up to four single-ended or two differential reference clocks plus one crystal/TCXO/OCXO source, enabling hitless reference switching between primary and backup sources.
Output configuration supports independent voltage domains per bank (VDDO0–VDDO5), fractional/integer dividers per channel, and protocol-specific termination (integrated 100Ω/85Ω LP-HCSL, AC-coupled LVPECL/CML compatibility). Configuration is stored in factory-programmed OTP (up to four full or 27 partial configurations) and accessible via 400kHz I²C/SMBus or 20MHz SPI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RMS Phase Jitter (156.25MHz) | 169fs typical - meets stringent SerDes clocking requirements for 400G Ethernet PHYs and JESD204C converters. |
| PCIe Gen7 Common Clock Jitter | 8fs RMS typical - enables direct use as PCIe reference clock without external cleanup. | SyncE Compliance | ITU-T G.8262 and G.8262.1 EEC/eEEC - certified for deployment in carrier-grade synchronous Ethernet equipment. |
| Jitter Attenuation Bandwidth | Programmable 0.1Hz to 12kHz - allows optimization for different noise profiles (e.g., low-frequency wander vs. high-frequency jitter). |
| Output Types | LVDS (1kHz–650MHz), LP-HCSL (1kHz–650MHz), LVCMOS (1kHz–200MHz) - supports mixed-protocol system clock distribution. |
| Input Flexibility | Up to 4 SE / 2 diff inputs + 1 crystal/TCXO/OCXO - enables robust multi-source redundancy in telecom infrastructure. |
| Configuration Storage | OTP holds 4 full or 27 partial configs - eliminates external EEPROM dependency and ensures boot-time reliability. |
Pinout & Package
RC31012B000GNA#KB0 is housed in a thermally enhanced 6×6 mm, 48-pin QFN package with exposed thermal pad (VFQFPN ePad). The package supports integrated crystal option (denoted by "KB0" suffix) and operates across –40°C to +85°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDDA, VDDX, VDDR, VDDD, VDDO0–VDDO5 | Analog, crystal, receiver, core, and output bank power supplies | Independent voltage domains enable mixed-signal isolation and optimized noise performance per functional block. |
| XIN_REFIN / XOUT_REFINb | Crytal input / oscillator feedback or differential reference input pair | Configurable interface supports fundamental-mode crystals (10–54MHz) or external differential references; XOUT_REFINb floats when using oscillator input. |
| CLKIN0_GPI0 / CLKIN0b_GPI1 CLKIN1_GPI2 / CLKIN1b_GPI3 | Differential clock inputs or GPIOs | Two fully differential input pairs accept LVDS/LVPECL/LP-HCSL; configurable as GPI during initialization for status monitoring. |
| OUT0–OUT11 / OUT0b–OUT11b | Differential clock outputs (12 pairs) | Each pair supports independent format (LVDS/LP-HCSL/LVCMOS), frequency, and termination; banked VDDO supplies allow mixed-voltage operation. |
| SCL_SCLK / SDA_nCS | I²C clock/data or SPI clock/chip select | 3.3V-tolerant dual-mode serial interface enables configuration without level-shifting in mixed-voltage systems. |
| GPIO0–GPIO4 | General-purpose I/O | 3-level logic during power-up enables hardware-based configuration state capture; programmable pull-up/down and interrupt capability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-loop DPLL + APLL architecture | Enables simultaneous low-jitter synthesis and precise network timing recovery - critical for 5G fronthaul and SyncE boundary clocks. |
| Integrated LP-HCSL terminations | On-die 85Ω/100Ω resistors eliminate external components for PCIe and Ethernet clock distribution, reducing BOM count and layout area. |
| JESD204B/C output support | Differential outputs can be DC- or AC-coupled to directly drive ADC/DAC SYSREF and device clocks - no external level-shifting required. |
| Hitless reference switching | Zero-glitch switchover between primary and backup timing sources maintains uninterrupted operation in telecom time-slave applications. |
| Multi-voltage output banks | Independent VDDO supplies per bank allow concurrent 1.8V LVDS, 2.5V LVCMOS, and 3.3V LP-HCSL outputs - simplifies mixed-protocol clock trees. |
Applications
| Switch/Routing Infrastructure | Synchronous Ethernet Equipment |
|---|---|
Use Scenario: High-density 400G line cards in core routers requiring ultra-low-jitter clock distribution to multiple SerDes lanes and FEC engines. IC Role / Device Role / Timing Role: Primary jitter-attenuated clock source for Ethernet PHYs and switch fabric ASICs, synchronized to SyncE network timing. Use Value: 169fs jitter ensures BER <1e-12 at 400G PAM4; G.8262.1 compliance guarantees interoperability with carrier-grade timing networks. | Use Scenario: SyncE-compliant packet transport equipment (PTE) operating as an EEC in mobile backhaul networks. IC Role / Device Role / Timing Role: Synchronous Ethernet Equipment Clock providing traceable timing derived from recovered SyncE signals or GPS-disciplined oscillators. Use Value: Dual DPLL modes (Normal/Holdover) maintain ±4.6ppm accuracy during network outages, meeting ITU-T G.8262.1 eEEC specifications. |
| Telecom Time Slave Clock (T-TSC) | 5G Small Cell Baseband Units |
Use Scenario: Centralized radio access network (C-RAN) units requiring precise phase alignment between distributed remote radio heads (RRHs). IC Role / Device Role / Timing Role: T-TSC device locked to IEEE 1588 grandmaster or SyncE master, distributing phase-coherent clocks to baseband processors and RF ICs. Use Value: Sub-100fs additive jitter preserves timing integrity across fronthaul links; programmable loop bandwidth rejects packet delay variation (PDV) noise. | Use Scenario: 5G NR small cell units with integrated massive MIMO processing, requiring low-jitter clocks for ADC/DAC sampling and JESD204C converter interfaces. IC Role / Device Role / Timing Role: JESD204C SYSREF and device clock generator with deterministic latency control and multi-device synchronization. Use Value: Direct JESD204C support on LVDS/LP-HCSL outputs eliminates external fanout buffers; 8fs PCIe jitter enables co-location with host processor clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar jitter attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5341-B-GM | 4-output variant; lacks integrated crystal option; higher typical jitter (200fs @ 156.25MHz); no G.8262.1 certification | Targeted at enterprise switches and test equipment where SyncE compliance is not required | Select when lower channel count suffices and external crystal is acceptable; verify holdover performance against G.8262.1. |
| LMK04832RHAR | 12-output but only 3 differential banks; no native JESD204C support; requires external loop filter; 125fs jitter @ 156.25MHz | Optimized for RF sampling and radar systems with strict phase noise requirements | Prefer for analog-heavy systems needing ultra-low phase noise below 100kHz offset; avoid if SyncE or integrated crystal is mandatory. |
Compared with Si5341-B-GM and LMK04832RHAR, RC31012B000GNA#KB0 uniquely combines G.8262.1 certification, integrated crystal, 12 independent output banks, and JESD204C-ready outputs - making it the only drop-in solution for carrier-class 5G and 400G SyncE infrastructure.
Availability
RC31012B000GNA#KB0 is available at Aetrix Electronics and suitable for 400G Ethernet PHYs, telecom time slave clocks, and 5G small cell baseband units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for RC31012B000GNA#KB0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and communications markets.
The RC310xxB family is designed specifically for high-reliability wire-line infrastructure and 5G network equipment, delivering sub-100fs additive jitter and carrier-grade synchronization compliance in compact, thermally optimized packages.
FAQ
What is the primary timing function of the RC31012B000GNA#KB0?
The RC31012B000GNA#KB0 functions as a dual-domain programmable jitter attenuator with integrated DPLL and APLL loops. It cleans incoming reference clocks while maintaining precise phase alignment to network timing standards like SyncE and IEEE 1588. Its design enables simultaneous low-jitter synthesis for local SerDes and high-accuracy recovery of network-derived timing - a capability essential in RC31012B000GNA#KB0 deployments across 400G switches and 5G base stations.
Does RC31012B000GNA#KB0 support both JESD204B and JESD204C protocols?
Yes, RC31012B000GNA#KB0 explicitly supports both JESD204B and JESD204C through its configurable differential outputs. The device allows DC- or AC-coupling on LVDS and LP-HCSL outputs, enabling direct connection to ADC/DAC SYSREF and device clock inputs per JESD204C specification. This capability is documented in the RC310xxB datasheet section "JESD204B/C support on differential or single-ended outputs", confirming RC31012B000GNA#KB0's readiness for next-generation converter interfaces.
What does the "KB0" suffix indicate in RC31012B000GNA#KB0?
"KB0" denotes the integrated crystal option for RC31012B000GNA#KB0. Unlike standard versions requiring external crystals or oscillators, KB0 variants embed a precision MEMS or quartz crystal within the 48-QFN package, eliminating board space, reducing EMI sensitivity, and improving startup reliability. This configuration is validated in Renesas' ordering information table (R31DS0179EU0124, Table 54) and referenced in the "integrated crystal option" description on page 1 of the datasheet.
Can RC31012B000GNA#KB0 operate without external configuration memory?
Yes, RC31012B000GNA#KB0 contains factory-programmed One-Time Programmable (OTP) memory that stores up to four complete or 27 partial configurations. This allows full autonomous operation at power-up without external I²C EEPROM or SPI flash. Serial interface access remains available for runtime reconfiguration, but RC31012B000GNA#KB0 will boot into a preloaded configuration even with no external memory present - a key reliability feature for telecom infrastructure.
How does RC31012B000GNA#KB0 achieve ITU-T G.8262.1 compliance?
RC31012B000GNA#KB0 achieves ITU-T G.8262.1 eEEC compliance through its dual-loop DPLL architecture, which provides tight phase-lock to SyncE Ethernet timestamps while rejecting packet delay variation (PDV) noise. Its specified holdover stability (±4.6ppm over 24 hours) and acquisition time (<60 seconds) meet eEEC requirements. These performance metrics are verified in the RC310xxB datasheet Table 14 ("Jitter Attenuator and Network Synchronization") and confirmed in Renesas' official compliance documentation for RC31012B000GNA#KB0.
RC31012B000GNA#KB0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- VersaClock® 7
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Jitter Attenuator
- PLL:
- Yes
- Input:
- CML, HCSL, LVCMOS, LVDS, LVPECL, Crystal
- Output:
- LP-HCSL, LVCMOS, LVDS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 3:12
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 200MHz, 650MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-VFQFPN (6x6)
RC31012B000GNA#KB0 FAQ
1.How can I place an order for RC31012B000GNA#KB0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RC31012B000GNA#KB0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RC31012B000GNA#KB0 reliable?
The price and inventory of RC31012B000GNA#KB0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RC31012B000GNA#KB0 is usually 5 days.
3.What payment methods are accepted for RC31012B000GNA#KB0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RC31012B000GNA#KB0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RC31012B000GNA#KB0?
RC31012B000GNA#KB0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RC31012B000GNA#KB0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RC31012B000GNA#KB0?
For technical support, including RC31012B000GNA#KB0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RC31012B000GNA#KB0 requirements.
6.How does Aetrix verify that RC31012B000GNA#KB0 is sourced from the original manufacturer or authorized distributors?
All RC31012B000GNA#KB0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RC31012B000GNA#KB0 meets industry standards.
7.What is the process for return or replacement of RC31012B000GNA#KB0?
All RC31012B000GNA#KB0 units undergo pre-shipment inspection (PSI). If there is an issue with RC31012B000GNA#KB0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RC31012B000GNA#KB0 part is unused and in its original packaging.
Return procedure for RC31012B000GNA#KB0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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