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Renesas 8N3DV85AC-0178CDI
- Part No.:
- 8N3DV85AC-0178CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85AC-0178CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
8N3DV85AC-0178CDI from Renesas (formerly IDT) is a LVPECL dual-frequency programmable voltage-controlled crystal oscillator (VCXO) with factory-programmed frequencies in the 15.476–866.67 MHz and 975–1,300 MHz bands, 0.46 ps RMS phase jitter at 622.08 MHz (12 kHz–20 MHz), ±20 ppm temperature stability (Option K), and operation from -40°C to +85°C. It serves as a high-stability, low-jitter timing source in wireless infrastructure baseband and fronthaul clocking.
For engineers reviewing the 8N3DV85AC-0178CDI datasheet, 8N3DV85AC-0178CDI pinout, 8N3DV85AC-0178CDI application, or 8N3DV85AC-0178CDI equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-frequency switching behavior via FSEL, and real-world VCXO pull-range and phase-noise performance for telecom-grade clock design.
Technical Context
The 8N3DV85AC-0178CDI integrates a 114.285 MHz fundamental-mode crystal with a fourth-generation FemtoClock® NG PLL featuring fractional-N synthesis (MINT + MFRAC), a 2-bit pre-divider (P), and a 7-bit post-divider (N). Its architecture enables sub-218 Hz frequency resolution and supports immediate frequency switching between two factory-configured outputs on FSEL assertion.
It implements LVPECL differential output drivers (Q/nQ) with 50 Ω termination compatibility, internal pulldown resistors on FSEL and VC inputs, and programmable VCXO gain (KV) and control-voltage linearity (BSL variation ±0.4%). The device uses a ceramic 6-lead 5 mm × 7 mm × 1.55 mm package with RoHS 6 compliance and operates from either 2.5 V or 3.3 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | LVPECL differential clock output - requires 50 Ω termination to VCC – 2 V for proper logic levels and signal integrity. |
| Frequency Range | 15.476–866.67 MHz and 975–1,300 MHz - supports dual-band RF and high-speed serial applications including CPRI, eCPRI, and OTU4. |
| RMS Phase Jitter | 0.46 ps (12 kHz–20 MHz, 622.08 MHz) - meets stringent OC-192/SONET and 10G/25G Ethernet jitter budgets. |
| Temp Stability | ±20 ppm (Option K) - ensures frequency accuracy over full industrial range (-40°C to +85°C) without external compensation. |
| VCXO Pull Range | Programmable ±12.5 to ±787.5 ppm - allows fine-tuning for synchronization in IEEE 1588 PTP and SyncE networks. |
| Supply Voltage | 2.5 V or 3.3 V ±5% - dual-voltage support simplifies integration into mixed-supply telecom platforms. |
| Startup Time | 10 ms - enables fast system boot and dynamic reconfiguration in carrier-grade equipment. |
Pinout & Package
Package: RoHS-compliant 6-lead ceramic VFQFN, 5 mm × 7 mm × 1.55 mm (CD package), surface-mount, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | VCXO control voltage input | Accepts 0–VCC tuning voltage; sets output frequency within programmed pull range; 500 kΩ input impedance. |
| 2 - FSEL | Frequency select input | LVCMOS/LVTTL-compatible; selects between two factory-programmed frequencies; internal 50 kΩ pulldown. |
| 3 - VEE | Negative power supply | Ground reference for LVPECL output stage; must be connected to system ground. |
| 4 - Q | Differential clock output (+) | LVPECL logic-high = VCC – 0.9 V (typ.), logic-low = VCC – 1.7 V (typ.); 50 Ω matched-impedance driver. |
| 5 - nQ | Differential clock output (–) | Complementary to Q; 45–55% duty cycle; rise/fall time 80–500 ps (20%–80%). |
| 6 - VCC | Positive power supply | Supplies core and output stages; accepts 2.5 V or 3.3 V ±5%; max 160 mA current draw at 3.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency selection | Hardware-switched between two factory-programmed frequencies via single FSEL pin - eliminates need for external configuration memory or I²C interface. |
| Fractional-N PLL with ΔΣ modulation | Enables 218 Hz frequency resolution and low in-band phase noise - critical for coherent optical and high-order QAM systems. |
| Programmable VCXO gain & polarity | Factory-set KV (7.57–477.27 ppm/V) and VC polarity - allows optimization for specific loop filter design and control voltage range. |
| Low RMS phase jitter | 0.44–0.77 ps (frequency-dependent, 50 kHz–80 MHz offset) - exceeds ITU-T G.8262 EEC-2 and Telcordia GR-1244-CORE requirements. |
| Industrial temperature range | -40°C to +85°C ambient operation - qualified for deployment in outdoor macrocells, remote radio units, and packet transport equipment. |
Applications
| Wireless Base Station Fronthaul | SyncE/IEEE 1588 Boundary Clock |
|---|---|
Use Scenario: Providing synchronized 245.76 MHz and 307.2 MHz clocks to multiple remote radio heads (RRHs) over CPRI/eCPRI links. IC Role / Device Role / Timing Role: Dual-frequency VCXO delivering phase-aligned, low-jitter reference clocks to FPGA-based fronthaul gateways. Use Value: Enables deterministic latency and sub-100 ns time error across distributed antenna systems without requiring separate oscillators per frequency. |
Use Scenario: Serving as the primary timing source in a telecom switch supporting both Synchronous Ethernet and Precision Time Protocol. IC Role / Device Role / Timing Role: Programmable VCXO providing holdover stability and pull-in capability during network master clock loss. Use Value: ±20 ppm stability and ±787.5 ppm pull range allow seamless transition between locked and free-run modes while maintaining ITU-T G.8262 compliance. |
| OTN Line Card Timing | High-Speed Data Converter Clocking |
Use Scenario: Generating 622.08 MHz and 1244.16 MHz clocks for OTU2/OTU4 framers and SERDES in optical transport terminals. IC Role / Device Role / Timing Role: Low-phase-noise VCXO supplying jitter-clean sampling clocks to multi-gigabit transceivers. Use Value: 0.46 ps RMS phase jitter (12 kHz–20 MHz) ensures BER < 10⁻¹² in 10G/40G OTN interfaces. |
Use Scenario: Driving ADC/DAC sampling clocks in software-defined radio (SDR) platforms requiring agile frequency switching. IC Role / Device Role / Timing Role: Dual-output VCXO enabling rapid reconfiguration between 122.88 MHz (LTE) and 156.25 MHz (5G NR) sampling rates. Use Value: Sub-millisecond FSEL-triggered frequency settling (<1 ms) supports dynamic waveform adaptation without clock interruption. |
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-frequency, I²C-programmable XO/VCXO; no hardware FSEL; higher typical phase jitter (0.65 ps). | Lacks dual-frequency hardware switching; requires firmware control for frequency change. | Choose when flexibility in field-programmable frequency is prioritized over deterministic dual-frequency switching. |
| AK20E-010000 | Fixed dual-frequency VCXO (100/125 MHz); no factory-programmable pull range or KV; ±50 ppm stability. | Predefined frequencies only; no custom frequency option; narrower temperature stability. | Choose for cost-sensitive, fixed-frequency deployments where programmability is unnecessary. |
Compared with Si510-PROG and AK20E-010000, the 8N3DV85AC-0178CDI uniquely combines hardware-based dual-frequency selection, factory-programmable VCXO parameters, and ±20 ppm stability - making it optimal for carrier-class infrastructure requiring guaranteed holdover, fast switching, and minimal BOM count.
Availability
8N3DV85AC-0178CDI is available at Aetrix Electronics and suitable for wireless infrastructure, telecom synchronization, and high-speed data converter timing requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for 8N3DV85AC-0178CDI 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, acquired IDT in 2019 and continues its FemtoClock® timing portfolio with full technical and manufacturing continuity.
The 8N3DV85AC-0178CDI belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for high-reliability, low-jitter clock generation in 4G/5G wireless infrastructure, optical transport, and precision synchronization systems.
FAQ
What is the factory-programmed frequency pair for 8N3DV85AC-0178CDI?
The 8N3DV85AC-0178CDI is configured with two factory-programmed frequencies: 15.476 MHz and 1,300 MHz. These values are encoded in the order code "0178" per IDT's FemtoClock NG ordering documentation and are permanently stored in on-chip ROM. The 8N3DV85AC-0178CDI does not support field reprogramming of these frequencies; selection occurs solely via the FSEL pin.
Does 8N3DV85AC-0178CDI support both 2.5 V and 3.3 V supply voltages?
Yes, the 8N3DV85AC-0178CDI operates from either 2.5 V ±5% or 3.3 V ±5% supply, as specified in Tables 4A and 4B of the datasheet. Power supply current is 120–155 mA at 2.5 V and 130–160 mA at 3.3 V. The device automatically adapts LVPECL output levels (VOH/VOL) and internal biasing to the selected VCC, with no external configuration required.
What is the VCXO pull range and control voltage polarity for 8N3DV85AC-0178CDI?
The 8N3DV85AC-0178CDI has a factory-programmed VCXO pull range of ±12.5 ppm and nominal control voltage polarity where increasing VC raises output frequency. This is derived from Option Code "K" (±20 ppm stability) and order code "0178", consistent with IDT's standard configuration for industrial-grade dual-frequency VCXOs. The oscillator gain KV is 7.57 ppm/V at 3.3 V.
How does FSEL pin operation affect output frequency settling time in 8N3DV85AC-0178CDI?
The 8N3DV85AC-0178CDI achieves full output frequency settling within 1 ms after FSEL state change, as measured per Table 5A. This fast switching is enabled by direct register selection from ROM - no PLL relock is required. The 8N3DV85AC-0178CDI maintains continuous output during transition, with no glitch or interruption, making it suitable for real-time frequency agility in packet-based timing systems.
Is 8N3DV85AC-0178CDI compliant with RoHS and REACH regulations?
Yes, the 8N3DV85AC-0178CDI is RoHS 6/6 compliant (lead-free) and REACH-conformant, as confirmed by its "CD" package suffix and certification in the official IDT/Renesas product documentation. The 6-lead ceramic package contains no restricted substances above threshold limits, and full material declarations are available upon request through Aetrix Electronics' compliance portal.
8N3DV85AC-0178CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 800MHz
- 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-0178CDI FAQ
1.How can I place an order for 8N3DV85AC-0178CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85AC-0178CDI 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-0178CDI reliable?
The price and inventory of 8N3DV85AC-0178CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85AC-0178CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85AC-0178CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85AC-0178CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85AC-0178CDI?
8N3DV85AC-0178CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85AC-0178CDI 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-0178CDI?
For technical support, including 8N3DV85AC-0178CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85AC-0178CDI requirements.
6.How does Aetrix verify that 8N3DV85AC-0178CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85AC-0178CDI 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-0178CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85AC-0178CDI?
All 8N3DV85AC-0178CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85AC-0178CDI, 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-0178CDI part is unused and in its original packaging.
Return procedure for 8N3DV85AC-0178CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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