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Renesas RC21008BQ50GL2#BD0
- Part No.:
- RC21008BQ50GL2#BD0
- Manufacturer:
- Renesas
- Package:
- 40-FLGA Exposed Pad
- Datasheet:
-
RC21008BQ50GL2#BD0.pdf
- Description:
- RC21008AQ50 VC7+XTAL - 8 OUTPUTS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
RC21008BQ50GL2#BD0 from Renesas Electronics is a seventh-generation programmable clock generator with 8 differential output pairs, integrated crystal, 169fs RMS phase jitter at 156.25MHz, PCIe Gen7 Common Clock compliance (8fs RMS), and support for LVCMOS (1kHz–200MHz), LVDS/LP-HCSL (1kHz–650MHz) outputs. It serves as a timing source in high-performance computing and enterprise storage systems.
For engineers reviewing the RC21008BQ50GL2#BD0 datasheet, RC21008BQ50GL2#BD0 pinout, RC21008BQ50GL2#BD0 application, or RC21008BQ50GL2#BD0 equivalent, key selection criteria include PCIe Gen7 jitter performance, integrated crystal option, OTP-configurable output banks, and dual serial interface (I²C/SPI) support for field reconfiguration.
Technical Context
The RC21008BQ50GL2#BD0 implements an advanced APLL architecture with fractional and integer output dividers, enabling precise frequency synthesis across 12 independent output banks. It supports SRIS and SRNS modes for PCIe applications and integrates LP-HCSL terminations (85Ω/100Ω) to eliminate external resistors.
Configuration is stored in factory-programmed OTP memory holding up to four full or 27 partial configurations, and runtime updates are supported via 400kHz I²C/SMBus or 20MHz SPI. Input monitoring detects loss-of-signal on CLKIN0/CLKIN1 and XIN_REFIN paths, triggering automatic failover or interrupt assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 8 differential output pairs (16 pins), each configurable as LVCMOS, LVDS, or LP-HCSL |
| Phase jitter (156.25MHz) | 169fs RMS typical - meets stringent SerDes clocking requirements for Gen7 PCIe and CXL |
| PCIe Gen7 refclk jitter | 8fs RMS typical - satisfies Common Clock mode spec for next-gen accelerators and switches |
| Output frequency range | LVCMOS: 1kHz–200MHz; LVDS/LP-HCSL: 1kHz–650MHz - covers CPU, memory, PHY, and fabric clocks |
| Configuration memory | One-Time Programmable (OTP) memory storing up to four complete or 27 partial configurations - enables multi-platform reuse without external EEPROM |
| Supply voltages | 1.8V/2.5V/3.3V for VDDA, VDDD, VDDR, VDDX, VDDOx - supports mixed-voltage system integration |
| Operating temperature | −40°C to +85°C - qualified for industrial and enterprise data center environments |
Pinout & Package
RC21008BQ50GL2#BD0 uses a 5 × 5 mm 40-pin QFN package with exposed thermal pad (VFQFPN). The "Q" suffix denotes integrated crystal option, eliminating external XTAL components and reducing board area and BOM count.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA, VDDD, VDDR, VDDX, VDDO0–VDDO4 | Analog, digital core, receiver, crystal, and output bank supplies | Independent power domains enable noise isolation between analog PLL, digital logic, inputs, and output banks |
| XIN_REFIN / XOUT_REFINb | Crystal input / crystal output (or differential reference input) | Supports integrated crystal (Q version) or external differential/single-ended reference; XOUT_REFINb floats when oscillator used |
| CLKIN0_GPI0 / CLKIN0b_GPI1 CLKIN1_GPI2 / CLKIN1b_GPI3 | Differential clock inputs or general-purpose inputs | Four GPI-capable inputs allow flexible clock sourcing or system control signaling (e.g., reset, mode select) |
| OUT0–OUT7 / OUT0b–OUT7b | Differential clock outputs | Eight fully independent output pairs, each assignable to LVCMOS/LVDS/LP-HCSL with per-bank voltage control |
| SCL_SCLK / SDA_nCS | I²C clock/data or SPI clock/chip-select | 3.3V-tolerant dual-mode serial interface enables configuration during boot or runtime without level shifters |
| GPIO0–GPIO4 | General-purpose I/O | Five CMOS I/Os with 3-level power-up detection - usable for status indication, fault reporting, or dynamic configuration control |
Key Features
| Feature | Design Value |
|---|---|
| Integrated crystal (Q version) | Eliminates external XTAL and load capacitors, reduces layout sensitivity, improves startup reliability, and saves ~3 mm² PCB area |
| LP-HCSL internal termination | On-die 85Ω or 100Ω termination removes need for external resistors - simplifies routing and improves signal integrity for PCIe/CXL applications |
| PCIe SRIS/SRNS support | Enables compliant spread-spectrum and autonomous clock management for Gen5/Gen6/Gen7 root complexes and endpoints without external logic |
| Four OTP configuration sets | Allows single hardware design to support multiple platforms (e.g., server, storage, accelerator) via software-selectable timing profiles |
| AC-coupling compatibility | Direct interface to LVPECL and CML receivers without DC bias circuitry - extends interoperability with legacy and specialized PHYs |
Applications
| High-Performance Computing Server | Enterprise NVMe Storage Array |
|---|---|
Use Scenario: Multi-socket CPU platform requiring synchronized clocks for CPU cores, memory controllers, PCIe Gen7 x16 slots, and CXL 3.0 devices. IC Role / Device Role / Timing Role: Primary programmable clock generator providing low-jitter reference clocks to CPU, DDR5 PHY, and accelerator cards. Use Value: 8fs RMS PCIe Gen7 jitter ensures compliance with strict SerDes eye margin requirements, reducing bit error rates in high-throughput interconnects. | Use Scenario: 2U rack-mount storage system with 24× NVMe U.2 drives, dual controllers, and PCIe switch fabric. IC Role / Device Role / Timing Role: Central timing hub distributing isolated, slew-rate-controlled clocks to SSD controllers, PCIe switches, and SAS expanders. Use Value: Independent VDDO banks allow per-device voltage scaling (1.8V/2.5V/3.3V), minimizing EMI and optimizing power across heterogeneous storage ICs. |
| Data Center Switch ASIC Platform | Industrial Edge AI Accelerator |
Use Scenario: 12.8 Tbps switch ASIC with 32× 400G Ethernet ports, each requiring deterministic low-skew clocks for SerDes lanes. IC Role / Device Role / Timing Role: Fanout buffer and jitter cleaner delivering phase-aligned clocks to multiple ASIC die and PHY packages. Use Value: Output-to-output skew <15ps (LVDS) and input-to-output skew <50ps ensure tight timing closure across large-scale retimer and gearbox ICs. | Use Scenario: Fanless edge inference module with FPGA, AI SoC, DDR4 memory, and 10GbE optical interface operating in −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Ruggedized clock source with integrated crystal and industrial temp grade, replacing discrete XO + fanout solution. Use Value: Integrated crystal eliminates microphonic sensitivity and cold-start drift issues common in external XTAL designs under thermal cycling. |
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, higher max frequency (710MHz), no integrated crystal, requires external XTAL and EEPROM | Better suited for ultra-wideband RF or test equipment; lacks PCIe Gen7 jitter certification | Select when >650MHz output or ultra-low additive jitter (<5fs) is required; accept added BOM and layout complexity |
| ICS8430N-01T | 8-output, fixed-frequency LVDS fanout (no PLL or programmability), 50fs RMS jitter at 156.25MHz | Targeted at cost-sensitive, static-clocking applications like baseband processing or legacy networking | Select only for non-reconfigurable, low-jitter fanout where frequency agility and PCIe compliance are unnecessary |
Compared with Si5341-B-GM and ICS8430N-01T, RC21008BQ50GL2#BD0 uniquely combines integrated crystal, PCIe Gen7-certified jitter, OTP-based multi-configuration storage, and industrial temperature operation - making it optimal for space-constrained, high-reliability compute and storage platforms requiring field-upgradable timing.
Availability
RC21008BQ50GL2#BD0 is available at Aetrix Electronics and suitable for high-performance computing servers, enterprise NVMe storage arrays, and data center switch ASIC platforms requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for RC21008BQ50GL2#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 is designed specifically for compute-intensive, PCIe Gen7–ready systems demanding ultra-low jitter, integrated timing consolidation, and field-programmable flexibility in compact form factors.
FAQ
What is the maximum output frequency supported by RC21008BQ50GL2#BD0 in LP-HCSL mode?
RC21008BQ50GL2#BD0 supports LP-HCSL outputs up to 650MHz, verified per Table 18 (Output Frequencies and Startup Times) and Table 28–31 (LP-HCSL AC/DC Characteristics) in the R31DS0009EU0126 datasheet. This covers PCIe Gen7 100MHz reference with 6.4 GT/s per lane and CXL 3.0 clocking requirements.
Does RC21008BQ50GL2#BD0 require an external EEPROM for configuration?
No, RC21008BQ50GL2#BD0 does not require an external EEPROM. Its factory-programmed One-Time Programmable (OTP) memory stores up to four complete or 27 partial configurations, enabling standalone operation. External EEPROM is optional for dynamic field updates via I²C.
How many general-purpose I/Os does RC21008BQ50GL2#BD0 provide, and what are their capabilities?
RC21008BQ50GL2#BD0 provides five GPIOs (GPIO0–GPIO4), each configurable as input or output with 3-level power-up detection. They operate at VDDD voltage (1.8V/2.5V/3.3V) and support CMOS logic levels post-configuration, enabling use for status signaling, fault reporting, or dynamic mode selection.
What is the significance of the "Q" in RC21008BQ50GL2#BD0?
The "Q" suffix in RC21008BQ50GL2#BD0 indicates the integrated crystal option. This version embeds a MEMS or quartz crystal within the 5×5 mm QFN package, eliminating external XTAL components, load capacitors, and associated layout constraints while improving startup consistency and thermal stability.
Is RC21008BQ50GL2#BD0 compliant with PCIe Gen7 Common Clock specifications?
Yes, RC21008BQ50GL2#BD0 is compliant with PCIe Gen7 Common Clock specifications, delivering 8fs RMS phase jitter at 156.25MHz (typ.) as measured per Table 9 (PCIe Refclk Phase Jitter) in the R31DS0009EU0126 datasheet - meeting the ≤10fs RMS requirement for Gen7 reference clock sources.
RC21008BQ50GL2#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)
RC21008BQ50GL2#BD0 FAQ
1.How can I place an order for RC21008BQ50GL2#BD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RC21008BQ50GL2#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 RC21008BQ50GL2#BD0 reliable?
The price and inventory of RC21008BQ50GL2#BD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RC21008BQ50GL2#BD0 is usually 5 days.
3.What payment methods are accepted for RC21008BQ50GL2#BD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RC21008BQ50GL2#BD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RC21008BQ50GL2#BD0?
RC21008BQ50GL2#BD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RC21008BQ50GL2#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 RC21008BQ50GL2#BD0?
For technical support, including RC21008BQ50GL2#BD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RC21008BQ50GL2#BD0 requirements.
6.How does Aetrix verify that RC21008BQ50GL2#BD0 is sourced from the original manufacturer or authorized distributors?
All RC21008BQ50GL2#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 RC21008BQ50GL2#BD0 meets industry standards.
7.What is the process for return or replacement of RC21008BQ50GL2#BD0?
All RC21008BQ50GL2#BD0 units undergo pre-shipment inspection (PSI). If there is an issue with RC21008BQ50GL2#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 RC21008BQ50GL2#BD0 part is unused and in its original packaging.
Return procedure for RC21008BQ50GL2#BD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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