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Renesas 8N4DV85EC-0019CDI8
- Part No.:
- 8N4DV85EC-0019CDI8
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N4DV85EC-0019CDI8.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
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Product details
Overview
8N4DV85EC-0019CDI8 from Renesas (formerly IDT) is a LVDS dual-frequency programmable VCXO with factory-programmed frequencies in two bands: 15.476–866.67 MHz and 975–1300 MHz, ±218 Hz resolution, 0.47 ps RMS phase jitter at 156.25 MHz (12 kHz–20 MHz), and operation from −40°C to +85°C. It serves as a precision timing source in wireless infrastructure baseband units requiring rapid frequency switching via FSEL control.
For engineers reviewing the 8N4DV85EC-0019CDI8 datasheet, 8N4DV85EC-0019CDI8 pinout, 8N4DV85EC-0019CDI8 application, or 8N4DV85EC-0019CDI8 equivalent, key selection criteria include dual-band frequency agility, LVDS output compliance, VCXO pull-range programmability (±4.5 to ±754.5 ppm), supply flexibility (2.5 V or 3.3 V), and ceramic 5 mm × 7 mm package compatibility with high-density RF board layouts.
Technical Context
The 8N4DV85EC-0019CDI8 implements a fourth-generation FemtoClock® NG PLL architecture with a 114.285 MHz fundamental crystal oscillator, fractional-N feedback divider (MINT + MFRAC), pre-divider (P), and post-divider (N), enabling sub-hertz frequency resolution across both bands. Its VCO operates at 1950–2600 MHz, supporting wideband synthesis while minimizing multiplication-induced phase noise.
Frequency selection is controlled by the LVCMOS/LVTTL-compatible FSEL pin, which switches between two factory-programmed configurations stored in ROM. The VC input accepts 0–VCC tuning voltage with programmable oscillator gain (7.57–477.27 ppm/V at 3.3 V), and output enable is absent-this device lacks an OE pin per ordering code "V85" and pin assignment diagram.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | LVDS differential clock output - ensures noise immunity and signal integrity on high-speed PCB traces. |
| Frequency Range | 15.476–866.67 MHz and 975–1300 MHz - supports dual-band cellular infrastructure (e.g., LTE/5G FR1 & FR2 local oscillators). |
| RMS Phase Jitter | 0.47 ps typical @ 156.25 MHz (12 kHz–20 MHz) - meets stringent SERDES and CPRI timing requirements. |
| Supply Voltage | 2.5 V or 3.3 V ±5% - compatible with common FPGA/ASIC I/O rails without level-shifting. |
| Operating Temp | −40°C to +85°C - qualified for industrial and outdoor wireless equipment deployment. |
| Absolute Pull Range | Programmable ±4.5 to ±754.5 ppm - enables precise loop bandwidth tuning in PLL-based synchronization systems. |
| Package | RoHS-compliant 6-lead ceramic 5 mm × 7 mm × 1.55 mm - low-profile, thermally robust, and suitable for reflow assembly. |
Pinout & Package
6-lead ceramic package (5 mm × 7 mm × 1.55 mm), RoHS 6-compliant, surface-mount, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VC | VCXO Control Voltage Input | Analog tuning port; 0–VCC range sets output frequency deviation per programmed KV gain (e.g., 7.57 ppm/V at 3.3 V). |
| 2 FSEL | Frequency Select Input | LVCMOS/LVTTL logic input; selects between two factory-programmed frequencies (0 = Freq₀, 1 = Freq₁) with ≤1 ms settling time. |
| 3 GND | Negative Power Supply | Dedicated ground reference for analog and digital sections; must be low-impedance and separated from noisy system grounds. |
| 4 Q | LVDS Positive Output | Differential clock output (Q); requires 100 Ω termination to VDD/2 or AC-coupled receiver per LVDS standard. |
| 5 nQ | LVDS Negative Output | Complementary LVDS output (nQ); paired with Q to deliver 247–454 mV differential swing and <55% duty cycle variation. |
| 6 VCC | Positive Power Supply | Single supply input (2.5 V or 3.3 V); decoupling capacitor (≥100 nF) required within 2 mm of pin for stable phase noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-band programmability | Two factory-set frequencies spanning 15.476–866.67 MHz and 975–1300 MHz - eliminates need for multiple XO/VCXO parts in multi-standard radios. |
| Fractional-N synthesis | MFRAC up to 18-bit + MINT 7-bit - achieves 218 Hz or better frequency resolution without external dividers or synthesizers. |
| Low phase noise architecture | −126 dBc/Hz @ 1 MHz offset (156.25 MHz carrier) - enables high-order QAM modulation in 5G massive MIMO transceivers. |
| Integrated pulldown resistors | 50 kΩ on FSEL and VC pins - simplifies board design by eliminating external biasing components for unused control inputs. |
| Thermal stability | Option code E (±50 ppm total stability over 10 years) - matches telecom-grade holdover and synchronization requirements per ITU-T G.8262. |
Applications
| Wireless Base Station Transceiver | CPRI/Ethernet Synchronization |
|---|---|
|
Use Scenario: Provides dual-frequency reference clocks for RF front-end up/down-conversion and digital baseband processing in macrocell and small-cell 5G NR systems. IC Role / Device Role / Timing Role: VCXO timing source with FSEL-controlled band switching - enables dynamic reconfiguration between FR1 (sub-6 GHz) and FR2 (mmWave) modes. Use Value: Eliminates manual clock source swapping during field upgrades; maintains <0.5 ps RMS jitter under temperature and supply variation. |
Use Scenario: Delivers traceable, low-jitter clock to CPRI framer ASICs and IEEE 1588 grandmaster clocks in fronthaul transport networks. IC Role / Device Role / Timing Role: Primary timing reference for packet-based synchronization - leverages ±50 ppm stability (option E) and sub-ps jitter to meet SyncE Class C and PRTC-B requirements. Use Value: Reduces time-error accumulation in distributed timing trees; supports holdover >24 hours within ±4.6 µs per day per ITU-T G.8273.2. |
| Optical Line Terminal (OLT) | Test & Measurement Equipment |
|
Use Scenario: Supplies synchronized clock to GPON/XGS-PON burst-mode receivers and upstream TDMA schedulers in fiber access networks. IC Role / Device Role / Timing Role: Dual-frequency VCXO for upstream/downstream channel separation - FSEL toggles between 1.25 Gbps and 10 Gbps line-rate clocks. Use Value: Enables seamless rate adaptation without clock domain crossing logic; maintains <14 ps cycle-to-cycle jitter for clean eye diagrams. |
Use Scenario: Used in high-resolution spectrum analyzers and arbitrary waveform generators requiring agile, ultra-low-noise local oscillators. IC Role / Device Role / Timing Role: Programmable reference oscillator for frequency synthesis subsystems - VC input allows real-time tuning for swept measurements. Use Value: Achieves <0.71 ps RMS phase jitter (max) across full band - improves SFDR by ≥3 dB compared to discrete crystal+PLL solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si514-A-D-GM | Single-frequency I²C-programmable XO (not VCXO); no VC input or FSEL; ±10 ppm stability; 100 MHz max output. | Lacks dual-band agility and analog tuning - suitable only for fixed-frequency, non-synchronized systems. | Select when absolute frequency stability outweighs pull-range flexibility and FSEL switching is unnecessary. |
| AK2A01-000000000000000 | LVDS dual-frequency VCXO; same 5×7 mm package; ±20 ppm option (K-code); 15–1300 MHz range; no FSEL pin - uses SPI for frequency selection. | Requires microcontroller interface and firmware overhead; slower switching (>10 ms); higher design complexity. | Choose when SPI-controlled frequency agility is preferred over hardware-pin simplicity and sub-ms switching is not critical. |
Compared with Si514-A-D-GM and AK2A01-000000000000000, the 8N4DV85EC-0019CDI8 uniquely delivers hardware-based dual-frequency switching with analog VCXO tuning, sub-ps jitter, and industrial temperature support - making it optimal for carrier-grade wireless infrastructure where deterministic timing behavior and minimal BOM count are essential.
Availability
8N4DV85EC-0019CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, telecom synchronization, and optical networking applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant ceramic packaging.
Supply support for 8N4DV85EC-0019CDI8 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, formed through the acquisition of IDT in 2019, is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and communications markets.
The 8N4DV85EC-0019CDI8 belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for high-performance, multi-band wireless infrastructure timing where low phase noise, dual-frequency agility, and industrial reliability are mandatory.
FAQ
What is the function of the FSEL pin on the 8N4DV85EC-0019CDI8?
The FSEL pin on the 8N4DV85EC-0019CDI8 is a LVCMOS/LVTTL-compatible digital input that selects between two factory-programmed output frequencies. When driven low (0), it activates Frequency 0; when high (1), it activates Frequency 1. Switching occurs within 1 ms, with no glitch or runt pulse, enabling reliable band-switching in 5G baseband architectures. The pin includes an internal 50 kΩ pulldown resistor.
Does the 8N4DV85EC-0019CDI8 support output enable (OE) functionality?
No, the 8N4DV85EC-0019CDI8 does not include output enable (OE) functionality. Per its ordering code "V85" and pin assignment diagram, this variant omits an OE pin - outputs Q and nQ remain continuously active once powered. For applications requiring clock gating, external LVDS multiplexers or power sequencing must be used. This differs from variants like V75 or V01 that integrate OE.
What is the maximum RMS phase jitter specification for the 8N4DV85EC-0019CDI8 at 1 GHz output?
At 1 GHz output (within the 500 MHz < fOUT ≤ 1300 MHz band), the 8N4DV85EC-0019CDI8 specifies RMS phase jitter of 0.46–0.67 ps (typical to maximum) over the 12 kHz–20 MHz integration range. This value is measured with VC = VCC/2 and reflects the device's optimized fractional-N synthesis and high-VCO-frequency architecture, meeting OC-192 and 10G Ethernet PHY timing budgets.
Can the 8N4DV85EC-0019CDI8 be operated from a 2.5 V supply?
Yes, the 8N4DV85EC-0019CDI8 supports both 2.5 V ±5% and 3.3 V ±5% supply voltages. At 2.5 V, it draws 136–170 mA (typical 170 mA), delivers LVDS output swing of 247–454 mV, and maintains full AC/DC specifications including ±50 ppm total stability (option E) and 0.47 ps RMS phase jitter at 156.25 MHz. No configuration change is needed - supply voltage is detected automatically.
What package type and dimensions does the 8N4DV85EC-0019CDI8 use?
The 8N4DV85EC-0019CDI8 uses a RoHS 6-compliant 6-lead ceramic surface-mount package measuring 5.0 mm × 7.0 mm × 1.55 mm. It features gold-plated terminations, is qualified for reflow soldering per J-STD-020, and has a junction-to-ambient thermal resistance (θJA) of 49.4°C/W at zero airflow. This compact, thermally efficient package is widely adopted in high-density RF modules.
8N4DV85EC-0019CDI8 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:
- 155.52MHz, 161.132MHz
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 140 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-CLCC (7x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
8N4DV85EC-0019CDI8 FAQ
1.How can I place an order for 8N4DV85EC-0019CDI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N4DV85EC-0019CDI8 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 8N4DV85EC-0019CDI8 reliable?
The price and inventory of 8N4DV85EC-0019CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4DV85EC-0019CDI8 is usually 5 days.
3.What payment methods are accepted for 8N4DV85EC-0019CDI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4DV85EC-0019CDI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N4DV85EC-0019CDI8?
8N4DV85EC-0019CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N4DV85EC-0019CDI8 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 8N4DV85EC-0019CDI8?
For technical support, including 8N4DV85EC-0019CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4DV85EC-0019CDI8 requirements.
6.How does Aetrix verify that 8N4DV85EC-0019CDI8 is sourced from the original manufacturer or authorized distributors?
All 8N4DV85EC-0019CDI8 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 8N4DV85EC-0019CDI8 meets industry standards.
7.What is the process for return or replacement of 8N4DV85EC-0019CDI8?
All 8N4DV85EC-0019CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N4DV85EC-0019CDI8, 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 8N4DV85EC-0019CDI8 part is unused and in its original packaging.
Return procedure for 8N4DV85EC-0019CDI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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