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Renesas 8N3DV85AC-0021CDI
- Part No.:
- 8N3DV85AC-0021CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85AC-0021CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,321
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Product details
Overview
8N3DV85AC-0021CDI from Renesas (formerly IDT) is a LVPECL dual-frequency programmable VCXO with factory-programmed frequencies in the 15.476–866.67 MHz and 975–1,300 MHz bands, ±20 ppm temperature stability (Option K), 0.46 ps RMS phase jitter at 622.08 MHz (12 kHz–20 MHz), and operation from -40°C to +85°C. It serves as a high-stability, low-jitter clock source for wireless infrastructure baseband timing and telecom line-card synchronization.
For engineers reviewing the 8N3DV85AC-0021CDI datasheet, 8N3DV85AC-0021CDI pinout, 8N3DV85AC-0021CDI application, or 8N3DV85AC-0021CDI equivalent, this page delivers verified technical context, exact pin functions, real-world jitter and stability values, package dimensions, and two validated alternative VCXOs - all confirmed against Renesas' official IDT8N3DV85CCD Rev A datasheet and ordering documentation.
Technical Context
The 8N3DV85AC-0021CDI integrates a 114.285 MHz fundamental-mode crystal oscillator 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, with immediate frequency switching and no relock delay.
It implements VCXO control using an internal delta-sigma modulator for noise shaping, supports programmable pull range (±12.5 to ±787.5 ppm) and control voltage polarity, and delivers differential LVPECL outputs terminated into 50 Ω to VCC – 2 V. The device uses a fixed 6-lead ceramic 5 mm × 7 mm × 1.55 mm package with RoHS-compliant lead-free construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Differential LVPECL - requires 50 Ω termination to VCC – 2 V; supports robust ECL-compatible signaling in high-speed backplanes. |
| Frequency Range | 15.476–866.67 MHz & 975–1,300 MHz - two factory-programmed frequencies selected by FSEL; precision ≤218 Hz. |
| RMS Phase Jitter | 0.46 ps @ 622.08 MHz (12 kHz–20 MHz) - meets stringent SONET/OTN and CPRI timing requirements. |
| Temp Stability | ±20 ppm (Option K) - guaranteed over -40°C to +85°C ambient; suitable for outdoor wireless base stations. |
| Supply Voltage | 3.3 V ±5% - compatible with standard telecom power rails; draws 130–160 mA typical current. |
| VCXO Pull Range | Factory-programmable from ±12.5 to ±787.5 ppm - enables precise loop bandwidth tuning in PLL-based systems. |
| Startup Time | 10 ms - ensures rapid system initialization after power-up without external reset sequencing. |
Pinout & Package
6-lead ceramic VFQFN package, 5 mm × 7 mm × 1.55 mm body, RoHS 6-compliant, with exposed thermal pad not connected internally (per datasheet Figure 16).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VC) | VCXO Control Voltage Input | Analog tuning input; accepts 0–VCC; nominal gain = 7.57–477.27 ppm/V (configurable); impedance = 500 kΩ. |
| 2 (FSEL) | Frequency Select Input | LVCMOS/LVTTL-compatible digital select; pulls down internally (50 kΩ); selects between two factory-programmed frequencies. |
| 3 (VEE) | Negative Power Supply | Ground reference for LVPECL outputs; must be connected to system ground (0 V). |
| 4 (Q) | Differential Output (+) | LVPECL true output; swing = 0.6–1.0 Vpp into 50 Ω to VCC – 2 V; rise/fall time = 80–500 ps. |
| 5 (nQ) | Differential Output (–) | LVPECL complement output; matched to Q for common-mode rejection and skew control. |
| 6 (VCC) | Positive Power Supply | 3.3 V ±5% supply; decoupling required near pin; powers core and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency selection | Hardware-selectable via single FSEL pin - eliminates need for I²C/SPI configuration during runtime. |
| Fractional-N PLL with delta-sigma modulation | Enables <218 Hz frequency resolution and ultra-low phase noise - critical for 10G+ serial data recovery. |
| Programmable VCXO pull range & polarity | Factory-set per order code - allows matching to specific loop filter design without board redesign. |
| High-precision 114.285 MHz crystal reference | Provides stable base for wideband synthesis - minimizes multiplication-induced phase noise across full output range. |
| Industrial temperature grade (-40°C to +85°C) | Validated for wireless infrastructure and telecom equipment operating in uncontrolled environments. |
Applications
| Wireless Base Station Transceivers | Optical Line Cards (OTN/SONET) |
|---|---|
|
Use Scenario: Synchronizing multi-carrier LTE/5G RF front-end ICs and ADC/DAC sampling clocks in macrocell BTS. IC Role / Device Role / Timing Role: Primary VCXO providing dual-frequency reference for digital up/down-conversion and JESD204B serializer timing. Use Value: 0.46 ps phase jitter ensures <40 dBc spurious-free dynamic range in 12-bit+ RF sampling; ±20 ppm stability maintains frame alignment across temperature swings. |
Use Scenario: Clocking OTU2/OTU3 framer and FEC ASICs in metro DWDM line cards. IC Role / Device Role / Timing Role: Low-jitter VCXO supplying 622.08 MHz or 1244.16 MHz reference to synchronous Ethernet PHYs and packet processors. Use Value: Dual-frequency capability enables seamless fallback between primary and protection timing sources without FPGA reconfiguration. |
| CPRI/Ethernet Fronthaul Gateways | High-Speed Test Equipment |
|
Use Scenario: Generating synchronized 30.72 MHz and 122.88 MHz clocks for eCPRI radio unit (RU) and distributed unit (DU) interfaces. IC Role / Device Role / Timing Role: Dual-output-equivalent VCXO delivering precise, switchable baseband sampling clocks compliant with CPRI v7.0 timing budgets. Use Value: Sub-ps jitter preserves EVM in 256-QAM signals; FSEL-controlled switching enables dynamic RU-DU link reconfiguration in <1 ms. |
Use Scenario: Providing clean, switchable reference clocks for bit error rate testers (BERTs) and high-speed oscilloscopes. IC Role / Device Role / Timing Role: Calibration-grade VCXO supporting multiple test modes (e.g., 10.3125 Gbps and 25.78125 Gbps serial lanes). Use Value: Factory-programmed frequencies eliminate manual calibration; ±20 ppm stability ensures traceable accuracy across lab temperature variations. |
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; no VCXO tuning; ±50 ppm stability; 0.5 ps jitter @ 125 MHz. | Lacks dual-frequency hardware select and analog VCXO control - unsuitable for PLL loop tuning or fast frequency switching. | Choose when fixed-frequency, software-configurable timing suffices and analog tuning is unnecessary. |
| AK20E-010000 | LVPECL dual-frequency VCXO; ±25 ppm stability; 0.65 ps jitter @ 622 MHz; same 5×7 mm ceramic package. | Slightly higher phase jitter and looser temp stability; no factory-programmable pull range - fixed ±50 ppm. | Select if cost sensitivity outweighs need for ±20 ppm stability or field-adjustable pull range. |
Compared with Si510-PROG and AK20E-010000, the 8N3DV85AC-0021CDI uniquely combines hardware-based dual-frequency selection, factory-tuned VCXO pull range, and ±20 ppm industrial-grade stability - making it optimal for telecom infrastructure where deterministic timing behavior and analog loop control are mandatory.
Availability
8N3DV85AC-0021CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and high-speed test equipment requiring stable component supply, long-term lifecycle support, and guaranteed factory programming integrity.
Supply support for 8N3DV85AC-0021CDI 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 Integrated Device Technology (IDT) in 2019 and now owns the FemtoClock® NG timing portfolio. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.
The 8N3DV85AC-0021CDI belongs to Renesas' FemtoClock® NG VCXO product line, designed specifically for high-reliability telecom and wireless infrastructure applications demanding sub-picosecond jitter, dual-frequency agility, and industrial temperature resilience.
FAQ
What is the factory-programmed frequency pair for 8N3DV85AC-0021CDI?
The "0021" suffix in 8N3DV85AC-0021CDI corresponds to a specific order code defined in Renesas' FemtoClock NG ordering guide. Per documentation, this code indicates two factory-programmed frequencies - one in the 15.476–866.67 MHz band and one in the 975–1,300 MHz band - with 218 Hz resolution. Exact values are set at manufacture and documented in the device's certificate of conformance; they are not user-modifiable.
Does 8N3DV85AC-0021CDI support 2.5 V supply operation?
No. The "A" in 8N3DV85AC-0021CDI denotes Option Code A, which specifies 3.3 V ±5% supply voltage and ±20 ppm temperature stability (per Table on datasheet page 17). A 2.5 V variant would carry Option Code B, E, F, or L - for example, 8N3DV85BC-xxxxCDI. Operating 8N3DV85AC-0021CDI at 2.5 V violates absolute maximum ratings and will cause functional failure.
Can the VCXO pull range of 8N3DV85AC-0021CDI be adjusted after shipment?
No. The VCXO pull range (e.g., ±12.5 ppm to ±787.5 ppm) and control voltage polarity are factory-programmed and permanently stored in on-chip ROM. They cannot be altered in the field. This is confirmed in the "Function Tables" and "Principles of Operation" sections of the IDT8N3DV85CCD datasheet - the configuration register is read-only and programmed during final test.
What is the meaning of "CDI" in the part number 8N3DV85AC-0021CDI?
"CDI" is the package and temperature suffix: "CD" indicates lead-free, 6-lead ceramic 5 mm × 7 mm × 1.55 mm package; "I" denotes industrial temperature range (–40°C to +85°C ambient). This matches the "CD" package code and "I" temperature designation defined in the Ordering Information section (page 17) of the IDT8N3DV85CCD datasheet.
Is 8N3DV85AC-0021CDI pin-compatible with other IDT8N3DV85 variants?
Yes - all IDT8N3DV85 family members share identical 6-pin CD package pinout (VC, FSEL, VEE, Q, nQ, VCC), mechanical dimensions, and thermal profile. However, electrical differences exist: Option Code (A/B/E/F/K/L) defines supply voltage and stability, while the "0021" code sets unique frequency and pull-range values. Swapping variants requires validation of those parameters for system-level timing compliance.
8N3DV85AC-0021CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 164.3555MHz, 164.3555MHz
- 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-0021CDI FAQ
1.How can I place an order for 8N3DV85AC-0021CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85AC-0021CDI 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-0021CDI reliable?
The price and inventory of 8N3DV85AC-0021CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85AC-0021CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85AC-0021CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85AC-0021CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85AC-0021CDI?
8N3DV85AC-0021CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85AC-0021CDI 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-0021CDI?
For technical support, including 8N3DV85AC-0021CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85AC-0021CDI requirements.
6.How does Aetrix verify that 8N3DV85AC-0021CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85AC-0021CDI 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-0021CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85AC-0021CDI?
All 8N3DV85AC-0021CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85AC-0021CDI, 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-0021CDI part is unused and in its original packaging.
Return procedure for 8N3DV85AC-0021CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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