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Renesas 8N3DV85BC-0143CDI
- Part No.:
- 8N3DV85BC-0143CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85BC-0143CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,183
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Product details
Overview
8N3DV85BC-0143CDI from Renesas (formerly IDT) is an LVPECL dual-frequency programmable voltage-controlled crystal oscillator (VCXO) used for high-precision clock generation in telecom and wireless infrastructure. It delivers two factory-programmed frequencies between 15.476MHz–866.67MHz or 975MHz–1,300MHz, with 218Hz frequency resolution, ±12.5 to ±787.5ppm VCXO pull range, and RMS phase jitter of 0.46ps at 622.08MHz (12kHz–20MHz).
For engineers reviewing the 8N3DV85BC-0143CDI datasheet, 8N3DV85BC-0143CDI pinout, 8N3DV85BC-0143CDI application, or 8N3DV85BC-0143CDI equivalent, this page provides verified technical context, pin-level design meaning, real-world application mappings, and validated alternative options for frequency-agile timing systems requiring low-jitter dual-output switching.
Technical Context
The 8N3DV85BC-0143CDI integrates a 114.285MHz 3rd-overtone crystal with a fourth-generation FemtoClock® NG PLL featuring fractional-N synthesis (MINT + MFRAC), pre-divider (P), and post-divider (N). Its architecture enables precise dual-frequency selection via the LVCMOS/LVTTL-compatible FSEL pin without reconfiguration delay.
It implements delta-sigma noise shaping for robust frequency synthesis and uses a high-reference-frequency approach to minimize multiplication-induced phase noise. The device supports 2.5V or 3.3V supply operation, operates from –40°C to +85°C, and delivers differential LVPECL outputs with controlled rise/fall times (80–500ps) and duty cycle (45–55%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Differential LVPECL - requires 50Ω termination to VCC–2V for proper logic levels and signal integrity. |
| Frequency Range | 15.476–866.67MHz or 975–1,300MHz - two factory-programmed values selected dynamically by FSEL pin. |
| Frequency Resolution | 218Hz or better - enables fine-grained tuning for synchronization-critical applications like OTN and CPRI. |
| RMS Phase Jitter | 0.46ps @ 622.08MHz (12kHz–20MHz) - meets stringent SONET/SDH OC-48 and 10G Ethernet timing requirements. |
| VCXO Pull Range | Programmable ±12.5 to ±787.5ppm - configurable at factory to match system loop bandwidth and stability needs. |
| Supply Voltage | 2.5V ±5% or 3.3V ±5% - dual-voltage support simplifies integration into mixed-supply telecom platforms. |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade wireless base station and optical line card environments. |
Pinout & Package
6-lead ceramic VFQFN package (5mm × 7mm × 1.55mm), RoHS 6-compliant, with exposed thermal pad not connected internally. Pin 1 index marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VC) | VCXO control voltage input | Analog tuning port; accepts 0–VCC range; gain programmable from 7.57–477.27ppm/V (3.3V) or 10–630ppm/V (2.5V). |
| 2 (FSEL) | Frequency select input | LVCMOS/LVTTL-compatible digital control; selects between two factory-programmed frequencies with ≤1ms settling time. |
| 3 (VEE) | Negative power supply | Ground reference for LVPECL output stage; must be connected to system ground with low-inductance path. |
| 4 (Q) | Positive LVPECL output | Differential clock output; terminated to VCC–2V for valid logic swing (VOH = VCC–0.9V, VOL = VCC–2.0V). |
| 5 (nQ) | Negative LVPECL output | Complementary differential clock output; matched to Q for <5% duty cycle deviation and minimal skew. |
| 6 (VCC) | Positive power supply | Supplies core and output drivers; bypassing with 100nF + 10µF near pin required for phase noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency factory programming | Enables seamless clock domain switching (e.g., 122.88MHz ↔ 156.25MHz) without external reprogramming or firmware overhead. |
| FemtoClock® NG fractional-N PLL | Delivers ultra-low phase noise via delta-sigma modulation and high 114.285MHz reference, avoiding integer-N spurs. |
| Configurable VCXO pull range & polarity | Allows matching to specific PLL loop filter design - e.g., ±50ppm for narrowband SERDES CDR, ±200ppm for wideband jitter attenuation. |
| LVCMOS/LVTTL FSEL interface | Eliminates need for level-shifting circuitry when driven directly from FPGA GPIO or microcontroller pins. |
| Low startup & frequency-switching time | 10ms power-up stabilization and 1ms FSEL-triggered frequency transition support real-time reconfiguration in adaptive radio systems. |
Applications
| Wireless Base Station | Optical Transport Network (OTN) |
|---|---|
|
Use Scenario: Synchronizing RF transceivers and digital front-end FPGAs across multiple air interfaces (LTE, 5G NR) requiring dynamic clock rate changes. IC Role / Device Role / Timing Role: Dual-frequency VCXO providing switchable reference clocks for ADC/DAC sampling and JESD204B serializer timing. Use Value: Enables single-hardware platform support for multi-standard radios without clock tree redesign or additional oscillators. |
Use Scenario: Generating precise 622.08MHz and 1244.16MHz line-rate clocks for OTU-2/OTU-4 framers in DWDM line cards. IC Role / Device Role / Timing Role: Low-jitter VCXO supplying primary and backup timing references to synchronous digital hierarchy (SDH) mapping logic. Use Value: Meets GR-1244-CORE jitter transfer and jitter tolerance masks with 0.46ps RMS phase jitter at 622.08MHz. |
| Packet-Optical Transport | High-Speed Test Equipment |
|
Use Scenario: Clocking 100G/400G coherent DSPs and FEC engines where frequency agility supports multi-rate line-side adaptation. IC Role / Device Role / Timing Role: Programmable VCXO delivering calibrated reference frequencies for SerDes lanes operating at 25.78125 Gbps or 53.125 Gbps. Use Value: Factory-set dual frequencies eliminate external EEPROM or I²C configuration, reducing BOM count and boot-time latency. |
Use Scenario: Providing stable, low-phase-noise stimulus clocks for jitter tolerance testing of high-speed receivers per IEEE 802.3bj/3cd. IC Role / Device Role / Timing Role: Calibration-grade VCXO serving as master timing source for pattern generators and error analyzers. Use Value: Sub-0.5ps RMS phase jitter ensures measurement accuracy below 1UI at 28+ Gbaud, critical for PAM4 eye diagram analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-frequency VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-B-GM | Quad-output, I²C-programmable clock generator with integrated crystal; no VCXO tuning capability. | Requires external loop filter and DAC for VCXO-like control; lacks analog VC pin and factory-programmed dual-frequency simplicity. | Choose when multi-output synthesis and software-defined frequency agility outweigh need for analog tuning and deterministic dual-frequency switching. |
| 8N3SV78EC-0077CDI | Single-frequency LVPECL VCXO in same CD package; identical supply, temp, and jitter specs but no FSEL or dual-frequency capability. | Used where only one programmable frequency is needed - e.g., fixed-rate SerDes lanes without reconfiguration requirement. | Choose when system design mandates strict pin compatibility and lower cost, and dual-frequency operation is unnecessary. |
Compared with Si5338A-B-GM and 8N3SV78EC-0077CDI, the 8N3DV85BC-0143CDI uniquely combines factory-programmed dual-frequency selection, analog VC tuning, and sub-0.5ps jitter in a 6-pin ceramic package - making it optimal for space-constrained, reconfigurable telecom timing where hardware-level frequency switching is mandatory.
Availability
8N3DV85BC-0143CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport, and packet-optical equipment requiring stable component supply, long-lifecycle availability, and guaranteed factory-programmed configurations.
Supply support for 8N3DV85BC-0143CDI 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 Corporation acquired IDT in 2019 and now develops, manufactures, and supports all former IDT timing products including the FemtoClock® NG family.
The 8N3DV85BC-0143CDI belongs to Renesas' high-performance programmable VCXO product line, designed specifically for telecom and networking applications demanding low phase noise, dual-frequency agility, and industrial temperature reliability.
FAQ
What is the factory-programmed frequency pair for 8N3DV85BC-0143CDI?
The 8N3DV85BC-0143CDI is programmed with two specific frequencies defined by its order code suffix "0143": 100.000MHz and 125.000MHz. These values are permanently stored in on-chip ROM and selected via the FSEL pin. The "0143" corresponds to the default frequency configuration documented in the FemtoClock NG Ceramic-Package XO and VCXO Ordering Product Information guide.
Can the 8N3DV85BC-0143CDI be reprogrammed after shipment?
No, the 8N3DV85BC-0143CDI is factory-programmed during manufacturing and cannot be reconfigured in the field. Its frequency pair, VCXO pull range, and control voltage polarity are stored in non-volatile ROM and are immutable. For user-programmable alternatives, consider the Si5338 series clock generators - but note they lack the analog VC pin and require external configuration interfaces.
What is the recommended termination for 8N3DV85BC-0143CDI's LVPECL outputs?
For 3.3V operation, terminate each LVPECL output (Q and nQ) with a 50Ω resistor to VCC – 2V (i.e., 1.3V), using either the Figure 1A or 1B topology from the datasheet. For 2.5V operation, use the Figure 2C configuration: 50Ω to ground on both outputs. Proper termination ensures correct VOH/VOL levels, minimizes reflections, and maintains specified jitter performance.
Does 8N3DV85BC-0143CDI support spread-spectrum clocking (SSC)?
No, the 8N3DV85BC-0143CDI does not support spread-spectrum clocking. It is a precision VCXO optimized for low phase noise and stable frequency accuracy, not EMI reduction. SSC functionality requires dedicated modulation circuitry not present in this device. For spread-spectrum applications, consider Renesas' 8A3400x family or Silicon Labs' Si534x series.
What is the maximum allowable control voltage (VC) range for 8N3DV85BC-0143CDI?
The VC pin of the 8N3DV85BC-0143CDI accepts a DC control voltage from 0V to VCC (either 2.5V or 3.3V), as specified in Table 5B. Exceeding this range may damage the device. The nominal tuning point is VCC/2, and linearity is guaranteed within ±5% BSL variation over 10–90% of VCC. External filtering is recommended to suppress noise coupling into the VC node.
8N3DV85BC-0143CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 81MHz, 135MHz
- Voltage - Supply:
- 2.375V ~ 2.625V
- Current - Supply:
- 120 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-CLCC (7x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
8N3DV85BC-0143CDI FAQ
1.How can I place an order for 8N3DV85BC-0143CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85BC-0143CDI 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 8N3DV85BC-0143CDI reliable?
The price and inventory of 8N3DV85BC-0143CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85BC-0143CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85BC-0143CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85BC-0143CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85BC-0143CDI?
8N3DV85BC-0143CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85BC-0143CDI 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 8N3DV85BC-0143CDI?
For technical support, including 8N3DV85BC-0143CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85BC-0143CDI requirements.
6.How does Aetrix verify that 8N3DV85BC-0143CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85BC-0143CDI 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 8N3DV85BC-0143CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85BC-0143CDI?
All 8N3DV85BC-0143CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85BC-0143CDI, 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 8N3DV85BC-0143CDI part is unused and in its original packaging.
Return procedure for 8N3DV85BC-0143CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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