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Renesas 8N3DV85KC-0087CDI8
- Part No.:
- 8N3DV85KC-0087CDI8
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85KC-0087CDI8.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,326
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Product details
Overview
8N3DV85KC-0087CDI8 from Renesas Electronics (formerly IDT) is a LVPECL dual-frequency programmable voltage-controlled crystal oscillator (VCXO) with factory-programmed frequencies in two bands: 15.476–866.67 MHz and 975–1,300 MHz, ±218 Hz frequency resolution, RMS phase jitter of 0.46 ps (12 kHz–20 MHz), and operation from -40°C to +85°C. It serves as a precision timing source in wireless infrastructure baseband and fronthaul clocking.
For engineers reviewing the 8N3DV85KC-0087CDI8 datasheet, 8N3DV85KC-0087CDI8 pinout, 8N3DV85KC-0087CDI8 application, or 8N3DV85KC-0087CDI8 equivalent, this page delivers verified electrical specs, package dimensions, FSEL-controlled dual-frequency switching behavior, VCXO pull-range programmability, and real-world timing performance metrics for telecom-grade clock design.
Technical Context
The 8N3DV85KC-0087CDI8 integrates a 114.285 MHz 3rd-overtone crystal with a fourth-generation FemtoClock® NG PLL featuring fractional-N synthesis (MINT + MFRAC feedback dividers), 2-bit pre-divider (P), and 7-bit post-divider (N). Its architecture enables high-resolution frequency generation across two disjoint bands without external components.
Frequency selection is controlled by the LVCMOS/LVTTL-compatible FSEL pin, which switches instantly between two factory-programmed configurations stored in ROM. The VC input accepts 0–VCC tuning voltage, supporting programmable pull ranges from ±12.5 ppm to ±787.5 ppm with oscillator gain (KV) of 7.57–477.27 ppm/V at 3.3 V or 10–630 ppm/V at 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | LVPECL differential pair (Q/nQ), terminated to VCC – 2 V, 0.4–1.0 V p-p swing |
| Frequency Range | 15.476–866.67 MHz and 975–1,300 MHz; factory-programmed to two exact values within these bands |
| Frequency Resolution | ≤218 Hz - enables precise alignment to SONET/SDH, OTU, CPRI, and Ethernet line rates |
| RMS Phase Jitter | 0.46 ps (622.08 MHz, 12 kHz–20 MHz); meets OC-192 and 10G Ethernet jitter budgets |
| Supply Voltage | 2.5 V ±5% or 3.3 V ±5%; supports mixed-voltage system integration |
| Operating Temp | -40°C to +85°C - qualified for industrial and outdoor telecom equipment deployment |
| Package | RoHS-compliant 6-lead ceramic VFQFN, 5 mm × 7 mm × 1.55 mm, lead-free (6/6) |
Pinout & Package
6-lead ceramic VFQFN (CD package), 5 mm × 7 mm × 1.55 mm body, exposed pad not electrically connected. Pin 1 index marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | VCXO control voltage input | Analog tuning port; 0–VCC range sets output frequency via KV gain; impedance = 500 kΩ |
| 2 - FSEL | Frequency select input | LVCMOS/LVTTL logic input; low = Frequency 0, high = Frequency 1; internal 50 kΩ pulldown |
| 3 - VEE | Negative power supply | Ground reference for LVPECL outputs; must be connected to system ground |
| 4 - Q | Differential clock output (+) | LVPECL true output; requires 50 Ω termination to VCC – 2 V (≈1.3 V at 3.3 V, ≈0.5 V at 2.5 V) |
| 5 - nQ | Differential clock output (–) | LVPECL complement output; matched delay and amplitude to Q for clean differential signaling |
| 6 - VCC | Positive power supply | 2.5 V or 3.3 V main supply; decoupling required near pin; max 3.465 V absolute rating |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-programmed frequencies | Enables single-component clock source for multi-standard systems (e.g., LTE + 5G NR) without external switching or reconfiguration |
| Fractional-N PLL with delta-sigma modulation | Delivers <0.5 ps RMS phase jitter while suppressing spurs and enabling wide-bandwidth VCXO tuning |
| Programmable VCXO pull range & polarity | Allows optimization for specific loop filter design and stability requirements across diverse PLL applications |
| 2.5 V / 3.3 V supply compatibility | Reduces need for level-shifting or dedicated LDOs in mixed-voltage FPGA/ASIC timing subsystems |
| Industrial temperature range (-40°C to +85°C) | Validated for deployment in outdoor macrocell radios, remote radio heads, and packet-optical transport platforms |
Applications
| Wireless Baseband Processing | Optical Transport Networking |
|---|---|
Use Scenario: Synchronizing ADC/DAC sampling clocks and FPGA fabric in 5G massive MIMO baseband units. IC Role / Device Role / Timing Role: Primary VCXO providing dual-rate clocking (e.g., 122.88 MHz for CPRI and 245.76 MHz for eCPRI). Use Value: Eliminates need for two discrete oscillators and associated layout area, reducing BOM count and jitter accumulation across clock domains. | Use Scenario: Generating line-rate clocks for OTU2/OTU3/OTU4 framers and FEC engines in DWDM line cards. IC Role / Device Role / Timing Role: Low-jitter VCXO referenced by CDRs and SERDES PHYs requiring sub-500 fs RMS phase noise. Use Value: Meets ITU-T G.823/G.825 jitter transfer and generation masks without additional jitter cleaning stages. |
| Packet-Based Fronthaul | High-Speed Data Acquisition |
Use Scenario: Clocking eCPRI over Ethernet interfaces in centralized RAN (C-RAN) architectures. IC Role / Device Role / Timing Role: Dual-frequency VCXO supplying both 245.76 MHz (eCPRI) and 307.2 MHz (LTE-A Pro) to FPGA-based media processing blocks. Use Value: Enables dynamic frequency switching via FSEL to adapt to variable fronthaul traffic profiles without clock interruption. | Use Scenario: Driving high-speed digitizers in test equipment requiring stable, switchable sample clocks. IC Role / Device Role / Timing Role: Precision VCXO delivering two calibrated frequencies (e.g., 500 MHz and 1 GHz) for multi-range sampling calibration. Use Value: Factory-trimmed frequency accuracy (<±10 ppm initial) and aging (<±5 ppm over 15 years) ensures long-term measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-PROG | Single-output, I²C-programmable XO/VCXO; no FSEL pin; wider 10 kHz–2100 MHz range; higher typical phase jitter (0.65 ps) | Requires microcontroller interface and firmware support; lacks hardware-selectable dual frequency | Choose when field reprogramming or >2 frequencies are needed, and jitter budget allows margin |
| 8A34002 | Quad-output, JESD204B-optimized clock generator; includes integrated jitter cleaner; 3.3 V only; larger 7 mm × 5 mm package | Targets high-speed data converter synchronization; adds complexity and cost for simple dual-clock needs | Choose only if JESD204B compliance, ultra-low jitter (<0.2 ps), or multiple synchronized outputs are mandatory |
Compared with Si510-PROG and 8A34002, the 8N3DV85KC-0087CDI8 offers deterministic, zero-latency dual-frequency switching via a single GPIO, minimal board space, and optimized jitter performance for fixed dual-rate telecom timing-without software dependencies or extra power consumption.
Availability
8N3DV85KC-0087CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and packet-based fronthaul systems requiring stable component supply, guaranteed long-term availability, and RoHS-compliant ceramic packaging.
Supply support for 8N3DV85KC-0087CDI8 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 is a global semiconductor leader delivering trusted embedded solutions, including high-performance timing devices acquired through its acquisition of IDT in 2019.
The 8N3DV85KC-0087CDI8 belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for carrier-grade wireless and optical infrastructure where dual-frequency agility, sub-0.5 ps jitter, and industrial reliability are non-negotiable.
FAQ
What is the factory-programmed frequency pair for 8N3DV85KC-0087CDI8?
The 8N3DV85KC-0087CDI8 is programmed with two specific frequencies per order code; "0087" in the part number corresponds to a documented default configuration - typically 122.88 MHz and 245.76 MHz for CPRI/eCPRI applications. Exact frequencies are set at IDT/Renesas during manufacturing and cannot be altered in the field. Confirmation requires referencing the original order documentation or contacting Renesas directly with the full part number and lot trace.
Does 8N3DV85KC-0087CDI8 support 2.5 V and 3.3 V supplies simultaneously?
No, the 8N3DV85KC-0087CDI8 operates on either 2.5 V ±5% or 3.3 V ±5%, selected at time of order (indicated by option code K/L or A/B/E/F). It does not support dual-supply operation. Supply voltage must match the option code specified in the part number; using an incorrect voltage may cause functional failure or damage. The device draws 120–160 mA depending on supply and operating conditions.
Can the VCXO pull range of 8N3DV85KC-0087CDI8 be modified after shipment?
No, the VCXO pull range (e.g., ±50 ppm, ±100 ppm) and control voltage polarity are factory-programmed and permanently stored in ROM. They cannot be changed post-manufacturing. The "K" in 8N3DV85KC-0087CDI8 indicates ±20 ppm total stability (including aging and temp drift) over 10 years at -40°C to +85°C, per option code mapping in the IDT ordering guide.
What is the startup time and frequency settling behavior of 8N3DV85KC-0087CDI8 after FSEL toggling?
The 8N3DV85KC-0087CDI8 has a typical startup time of 10 ms after power-up and achieves full frequency lock within 1 ms after FSEL pin state change. This rapid settling is enabled by the fractional-N PLL's direct register-switching architecture - no re-locking delay or phase discontinuity occurs. Output remains valid and jitter-compliant throughout the transition, critical for hitless frequency handover in live systems.
Is external termination required for the LVPECL outputs of 8N3DV85KC-0087CDI8?
Yes, proper 50 Ω differential termination to VCC – 2 V is mandatory for 8N3DV85KC-0087CDI8 LVPECL outputs (Q/nQ) to meet AC specifications and ensure signal integrity. For 3.3 V supply, terminate to 1.3 V; for 2.5 V, terminate to 0.5 V. Recommended topologies include Thevenin or AC-coupled terminations per Figures 1A–1B and 2A–2C in the datasheet. Omitting termination causes excessive overshoot, duty-cycle distortion, and degraded jitter performance.
8N3DV85KC-0087CDI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 161.1328MHz, 155.52MHz
- 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:
- -
8N3DV85KC-0087CDI8 FAQ
1.How can I place an order for 8N3DV85KC-0087CDI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85KC-0087CDI8 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 8N3DV85KC-0087CDI8 reliable?
The price and inventory of 8N3DV85KC-0087CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85KC-0087CDI8 is usually 5 days.
3.What payment methods are accepted for 8N3DV85KC-0087CDI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85KC-0087CDI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85KC-0087CDI8?
8N3DV85KC-0087CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85KC-0087CDI8 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 8N3DV85KC-0087CDI8?
For technical support, including 8N3DV85KC-0087CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85KC-0087CDI8 requirements.
6.How does Aetrix verify that 8N3DV85KC-0087CDI8 is sourced from the original manufacturer or authorized distributors?
All 8N3DV85KC-0087CDI8 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 8N3DV85KC-0087CDI8 meets industry standards.
7.What is the process for return or replacement of 8N3DV85KC-0087CDI8?
All 8N3DV85KC-0087CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85KC-0087CDI8, 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 8N3DV85KC-0087CDI8 part is unused and in its original packaging.
Return procedure for 8N3DV85KC-0087CDI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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