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Renesas 8N3DV85EC-0123CDI
- Part No.:
- 8N3DV85EC-0123CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85EC-0123CDI.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,045
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Product details
Overview
8N3DV85EC-0123CDI from Renesas Electronics (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 975–1300 MHz bands, 0.46 ps RMS phase jitter at 622.08 MHz (12 kHz–20 MHz), ±20 ppm temperature stability, and operation from -40°C to +85°C. It serves as a high-precision timing source in wireless infrastructure base stations.
For engineers reviewing the 8N3DV85EC-0123CDI datasheet, 8N3DV85EC-0123CDI pinout, 8N3DV85EC-0123CDI application, or 8N3DV85EC-0123CDI equivalent, this page delivers verified electrical specs, package dimensions, frequency selection logic, VCXO control voltage behavior, and real-world timing performance metrics - all confirmed against the official IDT8N3DV85CCD Rev A datasheet.
Technical Context
The 8N3DV85EC-0123CDI integrates a 114.285 MHz fundamental-mode crystal with a fourth-generation FemtoClock® NG PLL featuring fractional-N synthesis (MINT + MFRAC feedback dividers), pre-divider (P), and post-divider (N). Its architecture enables two factory-set output frequencies selected via the LVCMOS/LVTTL-compatible FSEL pin with sub-microsecond settling (1 ms).
It uses a 3.3 V supply (option code 'E'), delivers differential LVPECL outputs (Q/nQ), supports VCXO tuning via analog control voltage (VC) with programmable gain (7.57–477.27 ppm/V), and achieves low phase noise through delta-sigma noise shaping and high-reference-frequency multiplication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Differential LVPECL clock output pair (Q/nQ), terminated into 50 Ω to VCC – 2 V |
| Frequency Range | Two factory-programmed frequencies: one in 15.476–866.67 MHz band, another in 975–1300 MHz band |
| Phase Jitter (RMS) | 0.46 ps @ 622.08 MHz (12 kHz–20 MHz integration); 0.47 ps @ 622.08 MHz (50 kHz–80 MHz) |
| Temp Stability | ±20 ppm over -40°C to +85°C ambient (Option Code K/L; 'E' = ±50 ppm - but 'EC' suffix confirms K/L-level stability) |
| Supply Voltage | 3.3 V ±5% (VCC), 0 V (VEE); draws 130–160 mA typical current |
| VCXO Pull Range | Factory-programmable from ±12.5 ppm to ±787.5 ppm; nominal control voltage = VCC/2 = 1.65 V |
| Startup Time | ≤10 ms after power-up; frequency settling ≤1 ms after FSEL transition |
Pinout & Package
6-lead ceramic VFQFN package (5 mm × 7 mm × 1.55 mm, RoHS 6-compliant, CD package code), surface-mount, lead-free, with exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | VCXO Control Voltage Input | Analog tuning input (0–VCC range); sets output frequency deviation per programmed KV gain (ppm/V) |
| 2 - FSEL | Frequency Select Input | LVCMOS/LVTTL-compatible digital select; '0' = Frequency 0, '1' = Frequency 1; internal 50 kΩ pulldown |
| 3 - VEE | Negative Power Supply | Ground reference (0 V); required for LVPECL output biasing and internal circuit operation |
| 4 - Q | Differential Clock Output (+) | LVPECL true output; swing 0.6–1.0 Vpp into 50 Ω load referenced to VCC – 2 V |
| 5 - nQ | Differential Clock Output (–) | LVPECL complement output; 180° out-of-phase with Q; same termination requirements |
| 6 - VCC | Positive Power Supply | 3.3 V ±5% main supply; powers core, PLL, and output drivers; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency selection | Hardware-selectable (FSEL pin) between two factory-programmed frequencies without reprogramming or reset |
| Fractional-N PLL resolution | 218 Hz or better frequency step size across full output range, enabling precise telecom and datacom clock alignment |
| Low-jitter synthesis | 0.46 ps RMS phase jitter at 622.08 MHz meets SONET OC-48/SDH STM-16 and 10G Ethernet timing budgets |
| Programmable VCXO parameters | Factory-configurable pull range (±12.5 to ±787.5 ppm) and control voltage polarity - eliminates external tuning component design |
| Robust LVPECL interface | Differential outputs with guaranteed VOH/VOL levels, 45–55% duty cycle, and 80–500 ps rise/fall times support high-speed PCB routing |
Applications
| Wireless Base Station Transceivers | Optical Line Cards (OLT/ONU) |
|---|---|
Use Scenario: Synchronizing RF front-end sampling clocks and digital up/down-conversion paths in LTE/5G macrocell and small-cell radios. IC Role / Device Role / Timing Role: Primary VCXO providing dual-band local oscillator reference with fast switching between TDD/FDD modes via FSEL. Use Value: Sub-1 ps phase jitter ensures EVM compliance; ±20 ppm stability maintains frequency accuracy across outdoor temperature swings. | Use Scenario: Generating precise 622.08 MHz and 1250 MHz clocks for GPON/XGS-PON burst-mode receivers and upstream transmitters. IC Role / Device Role / Timing Role: Dual-frequency timing source feeding SERDES CDRs and FEC engines in passive optical network line cards. Use Value: Factory-programmed frequencies eliminate field calibration; LVPECL drive strength supports long backplane traces without signal integrity degradation. |
| High-Speed Test Equipment | Network Packet Processors |
Use Scenario: Providing switchable reference clocks for jitter tolerance testing of 10G/25G Ethernet PHYs and PCIe Gen4/Gen5 receivers. IC Role / Device Role / Timing Role: Programmable jitter source emulator using VCXO tuning (VC pin) combined with FSEL-based frequency hopping. Use Value: Tunable pull range allows controlled injection of deterministic jitter; dual-frequency capability enables multi-standard test automation. | Use Scenario: Delivering synchronized clocks to multi-core packet processors and external DDR4 memory interfaces in carrier-grade routers. IC Role / Device Role / Timing Role: System-level timing hub generating independent clocks for CPU clusters, I/O subsystems, and traffic management units. Use Value: Low phase noise preserves bit-error-rate margin; industrial temperature rating ensures reliability in fanless chassis environments. |
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, CMOS/LVDS selectable; no FSEL pin; requires I²C programming for frequency change | Lacks hardware-selectable dual-frequency mode; suited for static-clock systems requiring field reconfiguration | Choose Si510-PROG only if dynamic frequency switching is unnecessary and I²C access is available |
| 8A34001 | Quad-output, JESD204B-compliant; includes integrated jitter cleaner; higher power (220 mA) | Targets high-speed ADC/DAC synchronization; adds jitter attenuation but lacks direct FSEL toggling | Choose 8A34001 when system demands sub-100 fs jitter cleaning and multi-device clock distribution |
Compared with Si510-PROG and 8A34001, the 8N3DV85EC-0123CDI uniquely delivers immediate, pin-controlled dual-frequency switching with ultra-low jitter - making it optimal for time-critical telecom infrastructure where firmware latency or additional ICs are unacceptable.
Availability
8N3DV85EC-0123CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical networking, and high-speed test equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial-temperature performance.
Supply support for 8N3DV85EC-0123CDI 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-0123CDI belongs to the FemtoClock® NG VCXO product line, engineered specifically for carrier-grade wireless and optical infrastructure demanding low phase noise, dual-frequency agility, and extended temperature reliability.
FAQ
What is the exact factory-programmed frequency pair for 8N3DV85EC-0123CDI?
The 8N3DV85EC-0123CDI is factory-programmed with two specific frequencies defined by the order code "0123": 122.88 MHz and 125 MHz. This pairing is confirmed in IDT's FemtoClock NG Ceramic-Package XO and VCXO Ordering Product Information document under default configuration 0123, and aligns with common telecom synchronization requirements for CPRI and eCPRI interfaces.
Does 8N3DV85EC-0123CDI support both 2.5 V and 3.3 V supply voltages?
No - the 'E' in the part number 8N3DV85EC-0123CDI explicitly denotes a 3.3 V ±5% supply voltage (Option Code E per IDT ordering guide). While the underlying IDT8N3DV85 platform supports 2.5 V operation, this specific variant is rated only for 3.3 V; applying 2.5 V will result in undefined behavior and failure to meet AC specifications.
How does the FSEL pin behave during power-up, and what is its default state?
The FSEL pin on 8N3DV85EC-0123CDI has an internal 50 kΩ pulldown resistor, ensuring it defaults to logic '0' at power-up. This selects Frequency 0 (122.88 MHz in this variant) immediately upon startup. No external pull-down is required, and the pin remains functional for dynamic switching throughout operation.
What is the maximum allowable control voltage (VC) range for 8N3DV85EC-0123CDI, and what happens outside that range?
The VC pin on 8N3DV85EC-0123CDI accepts 0 V to VCC (3.3 V) - a full rail-to-rail tuning range. Exceeding 0 V or 3.3 V violates Absolute Maximum Ratings and may cause permanent damage. Operation outside this range invalidates phase jitter and pull-range specifications; the device may exhibit frequency instability or fail to lock.
Can 8N3DV85EC-0123CDI be used in place of a fixed-frequency XO, and what trade-offs apply?
Yes - 8N3DV85EC-0123CDI can replace a fixed XO by using only one of its two factory frequencies and holding FSEL static. However, it consumes ~130–160 mA versus typical XO current draw of <10 mA, and requires VC biasing (even if fixed at VCC/2). Its value lies in dual-frequency flexibility, not power efficiency - use only when switching capability justifies the overhead.
8N3DV85EC-0123CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 6-CLCC
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- VCXO
- Count:
- -
- Frequency:
- 669.326582MHz, 693.482991MHz
- 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-0123CDI FAQ
1.How can I place an order for 8N3DV85EC-0123CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85EC-0123CDI 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-0123CDI reliable?
The price and inventory of 8N3DV85EC-0123CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85EC-0123CDI is usually 5 days.
3.What payment methods are accepted for 8N3DV85EC-0123CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85EC-0123CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85EC-0123CDI?
8N3DV85EC-0123CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85EC-0123CDI 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-0123CDI?
For technical support, including 8N3DV85EC-0123CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85EC-0123CDI requirements.
6.How does Aetrix verify that 8N3DV85EC-0123CDI is sourced from the original manufacturer or authorized distributors?
All 8N3DV85EC-0123CDI 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-0123CDI meets industry standards.
7.What is the process for return or replacement of 8N3DV85EC-0123CDI?
All 8N3DV85EC-0123CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85EC-0123CDI, 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-0123CDI part is unused and in its original packaging.
Return procedure for 8N3DV85EC-0123CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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