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Renesas RC21008BQ00GL2#BD0
- Part No.:
- RC21008BQ00GL2#BD0
- Manufacturer:
- Renesas
- Package:
- 40-FLGA Exposed Pad
- Datasheet:
-
RC21008BQ00GL2#BD0.pdf
- Description:
- IC CLOCK GENERATOR
- Quantity:
- Payment:
- Shipping:
Inventory:4,247
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Product details
Overview
RC21008BQ00GL2#BD0 from Renesas Electronics is a seventh-generation programmable clock generator with 8 differential output pairs, 169fs RMS phase jitter at 156.25MHz, PCIe Gen7 Common Clock compliance (8fs RMS), and integrated crystal option in 5×5 mm 40-QFN package. It serves as a high-precision timing source for data center accelerators and enterprise storage controllers requiring low-jitter fanout and SRIS/SRNS support.
For engineers reviewing the RC21008BQ00GL2#BD0 datasheet, RC21008BQ00GL2#BD0 pinout, RC21008BQ00GL2#BD0 application, or RC21008BQ00GL2#BD0 equivalent, key selection criteria include PCIe Gen7 reference clock jitter performance, LP-HCSL/LVDS output flexibility, OTP-configurable multi-configuration storage, and integrated crystal option enabling compact board layout.
Technical Context
The RC21008BQ00GL2#BD0 implements an advanced APLL architecture with fractional and integer output dividers, supporting zero-delay buffer mode and static phase offset control. Its input monitoring supports dual differential reference inputs (CLKIN0/CLKIN1) plus crystal/REFIN interface with programmable input buffer modes for LVCMOS, LVDS, or HCSL signaling.
Output banks are independently powered (VDDO0–VDDO4) and configurable for LVCMOS (1kHz–200MHz), LVDS/LP-HCSL (1kHz–650MHz), with LP-HCSL integrating 85Ω or 100Ω terminations. Configuration occurs via factory-programmed OTP (up to four full or 27 partial configurations), I²C/SMBus (400kHz), or SPI (20MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Jitter (156.25MHz) | 169fs RMS typical - meets stringent compute and accelerator timing budgets |
| PCIe Gen7 Refclk Jitter | 8fs RMS typical - compliant with PCIe Gen7 Common Clock specification |
| Output Count | 8 differential output pairs (16 pins) - supports multi-domain clocking in dense systems |
| Output Frequency Range | LVCMOS: 1kHz–200MHz; LVDS/LP-HCSL: 1kHz–650MHz - covers CPU, memory, SerDes, and peripheral clocks |
| Configuration Memory | OTP holds up to four complete or 27 partial configurations - enables field-updatable timing profiles without external EEPROM |
| Operating Temp | −40°C to +85°C - qualified for industrial and data center thermal environments |
| Supply Voltages | 1.8V/2.5V/3.3V VDDA/VDDD/VDDO - supports mixed-voltage system integration |
Pinout & Package
RC21008BQ00GL2#BD0 uses a 5×5 mm, 40-pin QFN package with exposed thermal pad (VFQFPN ePad). The "Q" suffix denotes integrated crystal option, eliminating external XTAL components and reducing PCB footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA, VDDD, VDDR, VDDX, VDDO0–VDDO4 | Analog/Digital/Receiver/Crystal/Output Power Supplies | Independent power domains enable noise isolation and mixed-voltage operation per functional block |
| XIN_REFIN / XOUT_REFINb | Crystal Input / Crystal Output (or REFCLK±) | Supports integrated crystal oscillator mode or external differential reference; XOUT_REFINb left unconnected when using external oscillator |
| CLKIN0_GPI0 / CLKIN0b_GPI1 CLKIN1_GPI2 / CLKIN1b_GPI3 | Differential Clock Inputs or GPIs | Two configurable differential input pairs with programmable termination; double as general-purpose inputs during configuration |
| OUT0–OUT7 (and b variants) | Differential Clock Outputs | Eight fully independent output pairs, each assignable to LVCMOS, LVDS, or LP-HCSL with bank-specific VDDO supplies |
| SCL_SCLK / SDA_nCS | I²C/SMBus or SPI Interface | 3.3V-tolerant serial interface for configuration and status readback; nCS active-low for SPI mode |
| GPIO0–GPIO4 | General Purpose I/O | Five CMOS I/Os with 3-level logic during power-up; usable for reset control, status indication, or dynamic reconfiguration triggers |
Key Features
| Feature | Design Value |
|---|---|
| PCIe SRIS and SRNS Support | Enables compliance with PCIe scalable reliability, availability, and serviceability requirements in root complex and endpoint applications |
| LP-HCSL Integrated Termination | On-die 85Ω or 100Ω termination eliminates external resistors, reducing BOM count and layout complexity for PCIe clock distribution |
| AC-Coupling to LVPECL/CML | Allows direct interface to legacy or specialized SerDes PHYs without level-shifting circuitry |
| Programmable GPI/GPIO (4 GPI + 5 GPIO) | Provides hardware-triggered configuration switching, fault monitoring, or system synchronization without host processor intervention |
| Factory OTP with Multi-Config Storage | Stores up to four complete timing configurations, enabling rapid boot-mode selection or field firmware updates without external memory |
Applications
| High-Performance Computing | Data Center Accelerators |
|---|---|
Use Scenario: CPU and GPU complex clock tree with multiple voltage domains and jitter-sensitive interconnects. IC Role / Device Role / Timing Role: Primary programmable clock generator providing synchronized, low-jitter reference clocks to CPU cores, memory controllers, and PCIe Gen7 switches. Use Value: 8fs RMS PCIe Gen7 jitter ensures reliable link training and error-free operation at 64 GT/s data rates. | Use Scenario: FPGA-based AI inference accelerator card requiring precise clock alignment across DDR5, CXL, and PCIe subsystems. IC Role / Device Role / Timing Role: Central timing hub distributing phase-aligned clocks to memory PHYs, SerDes blocks, and on-board microcontrollers. Use Value: Fractional output dividers and zero-delay buffer mode enable exact frequency synthesis and deterministic skew control across heterogeneous interfaces. |
| Enterprise Storage | Industrial Networking |
Use Scenario: NVMe-oF storage controller with dual-port 100GbE and PCIe Gen5 SSD interfaces. IC Role / Device Role / Timing Role: Fanout buffer and jitter cleaner delivering clean 100MHz, 156.25MHz, and 322.265625MHz clocks to Ethernet MACs and SSD controllers. Use Value: 169fs RMS phase jitter at 156.25MHz meets IEEE 802.3bj CAUI-4 and PCIe Gen5 jitter masks simultaneously. | Use Scenario: Industrial switch with time-sensitive networking (TSN) support and redundant clock sources. IC Role / Device Role / Timing Role: Redundant clock source with automatic failover, using GPI inputs to monitor reference health and trigger switchover. Use Value: Dual differential inputs (CLKIN0/CLKIN1) and clock input monitor enable seamless reference switching with sub-microsecond detection latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5341-B-GM | 10-output, 118fs jitter at 156.25MHz, no integrated crystal, requires external XO | Lacks integrated crystal; higher board area and BOM cost; supports wider frequency range up to 1.4GHz | Select when ultra-wide output frequency coverage or multi-band PLL flexibility outweighs footprint and component count advantages of RC21008BQ00GL2#BD0 |
| ICS8430I-01LG | 8-output, 220fs jitter at 156.25MHz, fixed-frequency, no programmability, no PCIe Gen7 support | Not suitable for PCIe Gen7 or dynamically reconfigurable systems; limited to static clock trees | Select only for cost-sensitive, non-upgradable legacy designs where PCIe Gen7 compliance and field reprogramming are unnecessary |
Compared with Si5341-B-GM and ICS8430I-01LG, RC21008BQ00GL2#BD0 delivers superior PCIe Gen7 jitter performance with integrated crystal, reducing layout risk and component count while retaining full field programmability - critical for next-gen data center and TSN platforms.
Availability
RC21008BQ00GL2#BD0 is available at Aetrix Electronics and suitable for high-performance computing, data center accelerator, and enterprise storage applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for RC21008BQ00GL2#BD0 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 data infrastructure markets.
The RC210xxB VersaClock 7 family targets high-speed compute and communications systems needing PCIe Gen7-compliant, low-jitter, multi-output clock generation with integrated crystal and field-programmable flexibility.
FAQ
What is the maximum output frequency supported by RC21008BQ00GL2#BD0 in LP-HCSL mode?
RC21008BQ00GL2#BD0 supports LP-HCSL outputs up to 650MHz. This capability enables direct clocking of high-speed SerDes lanes in PCIe Gen6/Gen7, CXL 3.0, and 400G Ethernet PHYs without external frequency multiplication. The device maintains 8fs RMS PCIe Gen7 jitter compliance at 100MHz and scales performance across its full LP-HCSL range per Renesas R31DS0009EU0126 specifications.
Does RC21008BQ00GL2#BD0 require an external crystal?
No, RC21008BQ00GL2#BD0 does not require an external crystal because the "Q" suffix indicates it includes an integrated crystal. The internal crystal eliminates external XTAL components and associated load capacitors, simplifying layout and improving reliability. Table 16 of the datasheet confirms internal crystal characteristics for Q versions, including frequency tolerance and aging specs.
How many independent configurations can be stored in the OTP memory of RC21008BQ00GL2#BD0?
RC21008BQ00GL2#BD0 OTP memory holds up to four complete configurations or 27 partial configurations. This allows system designers to pre-load boot-time defaults, field-upgrade profiles, or application-specific timing maps without external EEPROM. Each configuration includes full register state, output assignments, divider settings, and power domain controls as defined in the VersaClock 7 programming model.
What serial interfaces does RC21008BQ00GL2#BD0 support for configuration?
RC21008BQ00GL2#BD0 supports both I²C/SMBus (up to 400kHz) and SPI (up to 20MHz) for configuration. The SCL_SCLK and SDA_nCS pins serve dual roles: in I²C mode they function as bidirectional clock/data lines; in SPI mode, SDA_nCS becomes an active-low chip select. Both interfaces are 3.3V tolerant and support readback of device status and configuration registers.
Is RC21008BQ00GL2#BD0 compatible with PCIe SRIS and SRNS protocols?
Yes, RC21008BQ00GL2#BD0 explicitly supports both PCIe SRIS (Scalable Reliable Interconnect Specification) and SRNS (Scalable Reliable Network Specification) as stated in its official features list. This support enables use in PCIe root complexes and endpoints requiring autonomous clock management, spread-spectrum compatibility, and robust jitter filtering under dynamic load conditions - essential for enterprise server and accelerator applications.
RC21008BQ00GL2#BD0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- VersaClock® 7
- Package/Case:
- 40-FLGA Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- Clock Generator
- PLL:
- Yes
- Input:
- CML, HCSL, LVCMOS, LVDS, LVPECL, Crystal
- Output:
- LP-HCSL, LVCMOS, LVDS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 3:8
- 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:
- 40-LGA (5x5)
RC21008BQ00GL2#BD0 FAQ
1.How can I place an order for RC21008BQ00GL2#BD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RC21008BQ00GL2#BD0 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 RC21008BQ00GL2#BD0 reliable?
The price and inventory of RC21008BQ00GL2#BD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RC21008BQ00GL2#BD0 is usually 5 days.
3.What payment methods are accepted for RC21008BQ00GL2#BD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RC21008BQ00GL2#BD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RC21008BQ00GL2#BD0?
RC21008BQ00GL2#BD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RC21008BQ00GL2#BD0 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 RC21008BQ00GL2#BD0?
For technical support, including RC21008BQ00GL2#BD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RC21008BQ00GL2#BD0 requirements.
6.How does Aetrix verify that RC21008BQ00GL2#BD0 is sourced from the original manufacturer or authorized distributors?
All RC21008BQ00GL2#BD0 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 RC21008BQ00GL2#BD0 meets industry standards.
7.What is the process for return or replacement of RC21008BQ00GL2#BD0?
All RC21008BQ00GL2#BD0 units undergo pre-shipment inspection (PSI). If there is an issue with RC21008BQ00GL2#BD0, 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 RC21008BQ00GL2#BD0 part is unused and in its original packaging.
Return procedure for RC21008BQ00GL2#BD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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