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Renesas 8N3DV85EC-0001CDI
- Part No.:
- 8N3DV85EC-0001CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85EC-0001CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
8N3DV85EC-0001CDI from Renesas (formerly IDT) is an LVPECL dual-frequency programmable VCXO with factory-programmed frequencies in the 15.476–866.67 MHz and 975–1,300 MHz bands, ±20 ppm total stability (Option K), 0.44–1.2 ps RMS phase jitter, and 218 Hz frequency resolution. It serves as a high-stability, low-jitter clock source for wireless infrastructure baseband timing and telecom line-card synchronization.
For engineers reviewing the 8N3DV85EC-0001CDI datasheet, 8N3DV85EC-0001CDI pinout, 8N3DV85EC-0001CDI application, or 8N3DV85EC-0001CDI equivalent, this page delivers verified technical context, package mapping, real-world jitter performance at 622.08 MHz and 1.25 GHz, FSEL-controlled dual-frequency switching, and validated alternatives for telecom-grade timing design.
Technical Context
The 8N3DV85EC-0001CDI implements a fourth-generation FemtoClock® NG PLL architecture with a 114.285 MHz fundamental crystal reference, fractional-N feedback divider (MINT + MFRAC), and 2-bit pre-divider (P) to synthesize two factory-programmed output frequencies across two disjoint bands. Its VCO operates at 1.95–2.6 GHz before post-division.
Frequency selection is performed via the LVCMOS/LVTTL-compatible FSEL pin, enabling sub-millisecond (<1 ms) settling between configurations. The device supports programmable VCXO pull range (±12.5 to ±787.5 ppm) and control voltage polarity, with oscillator gain (KV) calibrated to 7.57–477.27 ppm/V at 3.3 V and 10–630 ppm/V at 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | LVPECL differential pair (Q/nQ); requires 50 Ω termination to VCC – 2 V for proper DC bias and signal integrity. |
| Frequency Range | Two factory-programmed bands: 15.476–866.67 MHz and 975–1,300 MHz; enables flexible multi-standard support (e.g., CPRI + OTU4). |
| RMS Phase Jitter | 0.44 ps (typ.) at 1.25 GHz (50 kHz–80 MHz integration); meets stringent SONET/SDH OC-192 and 10G Ethernet jitter budgets. |
| Frequency Stability | ±20 ppm total stability over –40°C to +85°C (Option K); includes initial accuracy, temp drift, and 10-year aging. |
| Supply Voltage | 2.5 V or 3.3 V ±5%; supports mixed-voltage system integration without level-shifting. |
| FSEL Control | LVCMOS/LVTTL-compatible input; selects between two frequencies with <1 ms settling time and no glitching. |
| Package | RoHS-compliant 6-lead ceramic VFQFN (5 mm × 7 mm × 1.55 mm); optimized for thermal performance (θJA = 49.4°C/W, no airflow). |
Pinout & Package
6-lead ceramic VFQFN (CD package), 5 mm × 7 mm × 1.55 mm body, lead-free (RoHS 6), top-view pinout with Pin 1 index marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | VCXO control voltage input | Accepts 0–VCC tuning voltage; sets output frequency within programmed pull range; impedance = 500 kΩ. |
| 2 - FSEL | Frequency select input | LVCMOS/LVTTL logic level; selects between two factory-programmed frequencies; internal 50 kΩ pulldown. |
| 3 - VEE | Negative power supply | Ground reference for LVPECL outputs; must be connected to system ground plane for noise immunity. |
| 4 - Q | Differential clock output (+) | LVPECL high-speed output; terminated to VCC – 2 V; swing = 0.4–1.0 Vpp depending on supply. |
| 5 - nQ | Differential clock output (–) | Complementary to Q; used with Q for balanced transmission and common-mode noise rejection. |
| 6 - VCC | Positive power supply | 2.5 V or 3.3 V ±5%; supplies core and output drivers; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency programmability | Two independent factory-set frequencies enable dynamic reconfiguration (e.g., LTE vs. 5G NR mode switching) without external PLL reprogramming. |
| 218 Hz frequency resolution | Enables precise alignment to telecom standards such as 614.4 MHz (5G FR1) or 122.88 MHz (CPRI), minimizing residual phase error. |
| Sub-1 ps RMS phase jitter | 0.44 ps (1.25 GHz, 50 kHz–80 MHz) ensures compliance with ITU-T G.8262 EEC-2 and IEEE 1588v2 grandmaster timing requirements. |
| Configurable VCXO pull range | Factory-programmable ±12.5 to ±787.5 ppm allows optimization for loop bandwidth and holdover performance in syncE applications. |
| FemtoClock® NG PLL architecture | Uses delta-sigma modulated fractional-N synthesis with high-fXTAL (114.285 MHz) to suppress multiplication-induced phase noise. |
Applications
| Wireless Base Station Radio Unit | Optical Transport Network Line Card |
|---|---|
Use Scenario: Provides synchronized sampling clocks for dual-polarization massive MIMO RF transceivers operating at 3.5 GHz and 28 GHz bands. IC Role / Device Role / Timing Role: Dual-frequency VCXO delivering 122.88 MHz (CPRI) and 614.4 MHz (eCPRI) with sub-1 ps jitter to ADC/DAC clock trees. Use Value: Enables simultaneous support of legacy and next-gen fronthaul protocols without hardware change or clock tree redesign. | Use Scenario: Supplies reference clocks to OTN framers and SerDes in 100G/400G line cards requiring strict jitter transfer and generation limits. IC Role / Device Role / Timing Role: Low-jitter LVPECL clock source for synchronous Ethernet (SyncE) and PTP grandmaster timing recovery circuits. Use Value: Meets ITU-T G.8262 EEC-2 mask with 0.44 ps phase jitter at 1.25 GHz, eliminating need for external jitter cleaners. |
| 5G Core Network Timing Module | High-Density Telecom Server Clock Tree |
Use Scenario: Generates primary and backup timing references in boundary clocks deployed in mobile edge computing (MEC) nodes. IC Role / Device Role / Timing Role: Dual-output-capable VCXO providing redundant 10 MHz and 100 MHz references with ±20 ppm stability over industrial temperature. Use Value: Supports holdover operation during GNSS outage while maintaining traceability to Stratum 3E standards. | Use Scenario: Distributes low-skew clocks across multi-ASIC server platforms handling packet processing, encryption, and AI inference acceleration. IC Role / Device Role / Timing Role: Programmable clock generator feeding multiple FPGA and ASIC clock inputs via on-board fanout buffers. Use Value: Reduces BOM count by replacing discrete XO + VCXO pairs with single dual-frequency device, saving PCB area and power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-frequency VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5342-D06784-GM | Si5342 is a 4-output, software-programmable clock generator with integrated crystal; 8N3DV85EC-0001CDI is single-output, factory-programmed, crystal-integrated VCXO. | Si5342 supports dynamic frequency changes via I²C; 8N3DV85EC-0001CDI uses static FSEL pin control only. | Select Si5342 for systems requiring >2 outputs or field-upgradable frequencies; choose 8N3DV85EC-0001CDI for deterministic, low-latency dual-frequency switching in telecom hardware. |
| AK21E-125.0000T2 | AK21E is a fixed-frequency, ±20 ppm TCXO (125 MHz only); lacks dual-frequency capability, VCXO tuning, or FSEL control. | AK21E suits cost-sensitive, single-rate applications; 8N3DV85EC-0001CDI targets multi-standard, tunable timing in carrier-grade equipment. | Use AK21E where frequency agility is unnecessary and phase jitter <0.5 ps is not required; retain 8N3DV85EC-0001CDI when dual-band operation and sub-0.5 ps jitter are mandatory. |
Compared with Si5342-D06784-GM and AK21E-125.0000T2, the 8N3DV85EC-0001CDI uniquely delivers factory-trimmed dual-frequency VCXO performance in a compact ceramic package with guaranteed sub-0.5 ps jitter and deterministic <1 ms switching-critical for telecom infrastructure where firmware updates cannot interrupt timing continuity.
Availability
8N3DV85EC-0001CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networks, and 5G core timing modules requiring stable component supply, long-lifecycle availability, and RoHS-compliant ceramic packaging.
Supply support for 8N3DV85EC-0001CDI 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 8N3DV85EC-0001CDI belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for carrier-class telecom and networking equipment demanding ultra-low jitter, dual-frequency agility, and industrial-temperature reliability.
FAQ
What is the guaranteed RMS phase jitter performance of the 8N3DV85EC-0001CDI at 1.25 GHz?
The 8N3DV85EC-0001CDI guarantees 0.44–0.77 ps RMS phase jitter (random component) at 1.25 GHz over the 50 kHz–80 MHz integration range, measured per JEDEC Standard 65. This value is confirmed in Table 5A of the official datasheet and enables compliance with ITU-T G.8262 EEC-2 for synchronous Ethernet applications.
Does the 8N3DV85EC-0001CDI support both 2.5 V and 3.3 V supply voltages?
Yes, the 8N3DV85EC-0001CDI supports either 2.5 V ±5% or 3.3 V ±5% supply voltage, with corresponding LVPECL output swing and current specifications. DC characteristics-including VOH, VOL, and IEE-are separately characterized for each supply condition in Tables 4A–4D of the datasheet.
How does the FSEL pin function on the 8N3DV85EC-0001CDI?
The FSEL pin on the 8N3DV85EC-0001CDI is an LVCMOS/LVTTL-compatible input that selects between two factory-programmed frequencies: logic low (0) selects Frequency 0, logic high (1) selects Frequency 1. Settling occurs within 1 ms, with no output glitches during transition, as verified in Table 5A (tSET parameter).
What is the package type and thermal resistance of the 8N3DV85EC-0001CDI?
The 8N3DV85EC-0001CDI uses a lead-free 6-lead ceramic VFQFN package (5 mm × 7 mm × 1.55 mm, CD variant) with θJA = 49.4°C/W under still-air conditions. Package dimensions and thermal data are specified in Tables 6 and 16 of the datasheet, supporting thermal design for dense telecom PCB layouts.
Can the 8N3DV85EC-0001CDI be reprogrammed in the field?
No, the 8N3DV85EC-0001CDI is factory-programmed with two fixed frequencies and VCXO parameters (pull range, polarity) at IDT/Renesas prior to shipment. It does not support in-system or field reprogramming; configuration is stored in ROM and immutable after manufacturing.
8N3DV85EC-0001CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 125MHz, 100MHz
- 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:
- -
8N3DV85EC-0001CDI FAQ
1.How can I place an order for 8N3DV85EC-0001CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85EC-0001CDI 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 8N3DV85EC-0001CDI reliable?
The price and inventory of 8N3DV85EC-0001CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85EC-0001CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85EC-0001CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85EC-0001CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85EC-0001CDI?
8N3DV85EC-0001CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85EC-0001CDI 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 8N3DV85EC-0001CDI?
For technical support, including 8N3DV85EC-0001CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85EC-0001CDI requirements.
6.How does Aetrix verify that 8N3DV85EC-0001CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85EC-0001CDI 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 8N3DV85EC-0001CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85EC-0001CDI?
All 8N3DV85EC-0001CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85EC-0001CDI, 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 8N3DV85EC-0001CDI part is unused and in its original packaging.
Return procedure for 8N3DV85EC-0001CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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