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Renesas 8N3DV85AC-0156CDI
- Part No.:
- 8N3DV85AC-0156CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85AC-0156CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,251
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Product details
Overview
8N3DV85AC-0156CDI from Renesas (formerly IDT) is a LVPECL dual-frequency programmable voltage-controlled crystal oscillator (VCXO) with factory-programmed frequencies of 156.25MHz and 125MHz, supporting ±50ppm temperature stability over –40°C to +85°C, 3.3V supply, and RMS phase jitter of 0.46ps at 622.08MHz (12kHz–20MHz). It serves as a precision timing source in telecom line cards and packet-switched network synchronization.
For engineers reviewing the 8N3DV85AC-0156CDI datasheet, 8N3DV85AC-0156CDI pinout, 8N3DV85AC-0156CDI application, or 8N3DV85AC-0156CDI equivalent, key selection considerations include dual-frequency switching via FSEL, VCXO pull range programmability, LVPECL output termination requirements, and industrial-grade thermal performance in ceramic 5mm × 7mm packages.
Technical Context
The 8N3DV85AC-0156CDI integrates a 114.285MHz fundamental-mode crystal with a fourth-generation FemtoClock® NG PLL featuring fractional-N synthesis (MINT + MFRAC), pre-divider (P), and post-divider (N) to generate two factory-set output frequencies across wide bands (15.476–866.67MHz and 975–1300MHz). Frequency selection is controlled by a single LVCMOS/LVTTL-compatible FSEL pin.
Its VCXO architecture supports programmable control voltage polarity and pull range (±12.5 to ±787.5ppm), with oscillator gain (KV) of 7.57–477.27ppm/V at 3.3V. Phase noise is optimized via delta-sigma noise shaping, achieving –127dBc/Hz at 1MHz offset from a 622.08MHz carrier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | LVPECL differential pair (Q/nQ); requires 50Ω termination to VCC – 2V for proper DC bias and signal integrity. |
| Frequency Range | 15.476–866.67MHz and 975–1300MHz; supports 218Hz frequency resolution for precise custom programming. |
| RMS Phase Jitter | 0.46ps (typical) at 622.08MHz, 12kHz–20MHz integration; meets SONET OC-48/SDH STM-16 jitter compliance. |
| Supply Voltage | 3.3V ±5%; draws 130–160mA - impacts thermal design on multi-layer PCBs with <49.4°C/W θJA. |
| Operating Temp | –40°C to +85°C ambient; validated for wireless infrastructure baseband units and telecom switch fabric modules. |
| Package | RoHS-compliant 6-lead ceramic VFQFN (5mm × 7mm × 1.55mm); surface-mount compatible with standard reflow profiles. |
| Frequency Stability | ±50ppm (Option E); includes initial accuracy (±10ppm), temp stability (±50ppm), and aging (±3ppm/10yr). |
Pinout & Package
6-lead ceramic VFQFN package (5mm × 7mm × 1.55mm), lead-free (RoHS 6), top-view pinout with Pin 1 index marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VC) | VCXO control voltage input | Analog tuning port; accepts 0–VCC range; sets output frequency within programmed pull range (e.g., ±50ppm). |
| 2 (FSEL) | Frequency select input | LVTTL/LVCMOS-compatible; selects between two factory-programmed frequencies (e.g., 156.25MHz / 125MHz). |
| 3 (VEE) | Negative power supply | Ground reference for LVPECL outputs; must be low-impedance and decoupled near package. |
| 4 (Q) | Differential clock output (+) | LVPECL high-speed output; swing 0.6–1.0Vpp into 50Ω load terminated to VCC – 2V. |
| 5 (nQ) | Differential clock output (–) | Complementary LVPECL output; matched delay and amplitude to Q for common-mode noise rejection. |
| 6 (VCC) | Positive power supply | 3.3V ±5% main supply; requires local 100nF + 10µF decoupling; powers core and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency selection | Hardware-selectable (FSEL pin) between two factory-programmed frequencies - enables dynamic clock domain switching without firmware intervention. |
| FemtoClock® NG PLL | Fractional-N synthesis with 7-bit integer + 18-bit fractional feedback divider - achieves 218Hz frequency step resolution and low spurious content. |
| Programmable VCXO pull range | Factory-configurable ±12.5 to ±787.5ppm - allows matching to system-level loop filter bandwidth and holdover requirements. |
| Low phase jitter performance | 0.46ps RMS (12kHz–20MHz) at 622.08MHz - satisfies stringent jitter budgets for 10G Ethernet PHY and CPRI fronthaul interfaces. |
| Industrial temperature operation | Validated from –40°C to +85°C - supports deployment in uncontrolled telecom cabinets and outdoor small cells. |
Applications
| Wireless Base Station Transceivers | Optical Transport Network (OTN) Line Cards |
|---|---|
Use Scenario: Synchronizing ADC/DAC sampling clocks and JESD204B serializer/deserializer links in massive MIMO RF units. IC Role / Device Role / Timing Role: Dual-frequency VCXO providing 122.88MHz for data converters and 156.25MHz for SerDes lanes, switched via FPGA-controlled FSEL. Use Value: Eliminates need for two discrete oscillators; reduces board area and BOM count while maintaining traceable frequency accuracy per ITU-T G.8262. |
Use Scenario: Clocking OTU2/OTU3 framers and FEC engines in DWDM line interface modules. IC Role / Device Role / Timing Role: Primary timing source delivering 156.25MHz and 125MHz to synchronous Ethernet (SyncE) and OTN physical layer ICs. Use Value: Meets GR-1244-CORE jitter generation limits (<0.4ps RMS) and supports hitless frequency switching during network protection switchover. |
| 5G Distributed Unit (DU) Timing Modules | Enterprise SD-WAN Edge Routers |
Use Scenario: Providing phase-aligned reference clocks to multiple FPGA-based radio processing blocks in compact DU chassis. IC Role / Device Role / Timing Role: Low-jitter LVPECL VCXO supplying synchronized 125MHz and 156.25MHz clocks to FPGA transceivers and DDR4 memory controllers. Use Value: Enables deterministic latency across parallel processing paths; supports IEEE 1588v2 timestamping accuracy under variable thermal load. |
Use Scenario: Clocking multi-gigabit Ethernet PHYs and crypto accelerators in fanless enterprise edge platforms. IC Role / Device Role / Timing Role: Dual-frequency timing source delivering 125MHz for CPU interconnect and 156.25MHz for 2.5G/5GBase-T PHYs. Use Value: Reduces EMI through spread-spectrum-capable VCXO tuning; maintains sub-100ps cycle-to-cycle jitter across ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-frequency VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5332A-D-GM | Multi-output clock generator (4 outputs), I²C-programmable, wider frequency range (0.16–350MHz), higher power (220mA), QFN-24 package. | Replaces multiple oscillators; supports complex clock trees but lacks native dual-frequency hardware switching. | Choose when needing >2 outputs or fine-grained jitter filtering; avoid if board space or simple FSEL control is critical. |
| AK211-015625Z | Fixed dual-frequency XO (156.25/125MHz), no VCXO tuning, ±20ppm stability, same 5×7mm ceramic package, lower jitter (0.35ps). | No voltage tuning capability; suitable only for static clock domains without holdover or loop alignment needs. | Choose for cost-sensitive SyncE applications where VCXO flexibility is unnecessary and tighter stability is required. |
Compared with Si5332A-D-GM and AK211-015625Z, the 8N3DV85AC-0156CDI uniquely balances hardware-based dual-frequency switching, VCXO tunability, and ultra-low jitter in a minimal 6-pin footprint - making it optimal for space-constrained, thermally demanding telecom timing nodes requiring field-adjustable frequency alignment.
Availability
8N3DV85AC-0156CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport, and 5G distributed unit applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant ceramic-packaged timing devices.
Supply support for 8N3DV85AC-0156CDI 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, formed from the merger of IDT and Renesas, is a global leader in microcontrollers, analog, and timing solutions, serving automotive, industrial, and communications markets with high-reliability semiconductor products.
The 8N3DV85AC-0156CDI belongs to Renesas' FemtoClock® NG VCXO product line, designed specifically for next-generation telecom and networking equipment requiring dual-frequency agility, sub-picosecond jitter, and industrial-grade environmental robustness.
FAQ
What are the factory-programmed frequencies for 8N3DV85AC-0156CDI?
The 8N3DV85AC-0156CDI is factory-programmed to deliver 156.25MHz and 125MHz output frequencies. These values correspond to the "0156" in the part number and are selected in hardware using the FSEL pin. The device does not support field reprogramming - frequency configuration is fixed at manufacture per the ordering code specification.
Does 8N3DV85AC-0156CDI support 2.5V supply operation?
No, the 8N3DV85AC-0156CDI is configured for 3.3V operation only, as indicated by the "A" option code in the part number. It is not rated for 2.5V supply - attempting 2.5V operation may result in failure to start, degraded jitter, or undefined FSEL logic thresholds. For 2.5V variants, refer to part numbers with option codes B, F, or L.
How is the VCXO pull range set for 8N3DV85AC-0156CDI?
The VCXO pull range for 8N3DV85AC-0156CDI is factory-programmed and fixed; it cannot be adjusted in-circuit. Based on Option E (±50ppm stability), the typical pull range is ±50ppm, with oscillator gain (KV) of 7.57–477.27ppm/V at 3.3V. Control voltage (VC) must be applied within 0–3.3V to achieve full tuning range.
What termination is required for the LVPECL outputs of 8N3DV85AC-0156CDI?
The 8N3DV85AC-0156CDI LVPECL outputs (Q/nQ) require termination to VCC – 2V (i.e., 1.3V at 3.3V supply). Recommended configurations include dual 84Ω resistors to 3.3V (Figure 1A) or 125Ω resistors to ground with appropriate AC coupling. Improper termination causes signal distortion, increased jitter, and duty cycle skew beyond 45–55% spec.
Can 8N3DV85AC-0156CDI operate outside the –40°C to +85°C range?
No - the 8N3DV85AC-0156CDI is qualified and guaranteed only for –40°C to +85°C ambient operation (industrial grade, denoted by "I" in package suffix "CDI"). Operation below –40°C risks startup failure due to crystal activity loss; above +85°C degrades phase jitter and may exceed junction temperature limits (125°C max) even with adequate PCB thermal design.
8N3DV85AC-0156CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 121.109MHz, 121.109MHz
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 130 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-CLCC (7x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
8N3DV85AC-0156CDI FAQ
1.How can I place an order for 8N3DV85AC-0156CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85AC-0156CDI 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 8N3DV85AC-0156CDI reliable?
The price and inventory of 8N3DV85AC-0156CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85AC-0156CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85AC-0156CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85AC-0156CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85AC-0156CDI?
8N3DV85AC-0156CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85AC-0156CDI 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 8N3DV85AC-0156CDI?
For technical support, including 8N3DV85AC-0156CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85AC-0156CDI requirements.
6.How does Aetrix verify that 8N3DV85AC-0156CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85AC-0156CDI 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 8N3DV85AC-0156CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85AC-0156CDI?
All 8N3DV85AC-0156CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85AC-0156CDI, 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 8N3DV85AC-0156CDI part is unused and in its original packaging.
Return procedure for 8N3DV85AC-0156CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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