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Renesas 8N3DV85AC-0178CDI8
- Part No.:
- 8N3DV85AC-0178CDI8
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-CLCC
- Datasheet:
-
8N3DV85AC-0178CDI8.pdf
- Description:
- IC OSC VCXO DUAL FREQ 6-CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,461
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Product details
Overview
8N3DV85AC-0178CDI8 from Renesas Electronics (formerly IDT) is a LVPECL dual-frequency programmable voltage-controlled crystal oscillator (VCXO) with factory-programmed frequencies in two bands: 15.476–866.67 MHz and 975–1,300 MHz, ±218 Hz frequency resolution, RMS phase jitter of 0.46 ps (12 kHz–20 MHz), and operation from -40°C to +85°C. It serves as a precision timing source in wireless infrastructure baseband and fronthaul clocking.
For engineers reviewing the 8N3DV85AC-0178CDI8 datasheet, 8N3DV85AC-0178CDI8 pinout, 8N3DV85AC-0178CDI8 application, or 8N3DV85AC-0178CDI8 equivalent, this page delivers verified electrical specs, differential LVPECL output behavior, FSEL-controlled dual-frequency switching, VCXO pull-range programmability, and RoHS-compliant ceramic package details - all confirmed against the official IDT8N3DV85CCD Rev A datasheet.
Technical Context
The 8N3DV85AC-0178CDI8 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 high-resolution frequency generation across two disjoint bands while maintaining low phase noise via delta-sigma noise shaping.
Frequency selection is controlled by the LVCMOS/LVTTL-compatible FSEL pin, which toggles between two factory-programmed configurations stored in ROM. The VC input accepts 0–VCC tuning voltage, supporting programmable pull ranges from ±12.5 ppm to ±787.5 ppm with oscillator gain (KV) ranging 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), terminated to VCC – 2 V, supports 50 Ω transmission lines |
| Frequency Range | Two factory-set bands: 15.476–866.67 MHz and 975–1,300 MHz; resolution ≤218 Hz |
| RMS Phase Jitter | 0.46 ps typical (622.08 MHz, 12 kHz–20 MHz integration); enables SONET/OTN and CPRI compliance |
| Supply Voltage | 2.5 V ±5% or 3.3 V ±5%; draws 120–160 mA depending on VCC and temperature |
| Operating Temp | -40°C to +85°C ambient; qualified for industrial-grade wireless infrastructure and telecom equipment |
| Package | RoHS 6-compliant 6-lead ceramic VFQFN, 5 mm × 7 mm × 1.55 mm, thermal resistance θJA = 49.4°C/W (no airflow) |
| VCXO Pull Range | Factory-programmable from ±12.5 ppm to ±787.5 ppm; linearity ±0.4% BSL over 10–90% VCC |
Pinout & Package
6-lead ceramic VFQFN (5 mm × 7 mm × 1.55 mm), lead-free (RoHS 6), top-view pinout with index marker. Pin 1 = VC, Pin 2 = FSEL, Pin 3 = VEE, Pins 4–5 = Q/nQ (differential LVPECL outputs), Pin 6 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC | VCXO control voltage input | Analog tuning port; 0–VCC range sets output frequency within programmed pull range; 500 kΩ input impedance |
| FSEL | Frequency select input | LVCMOS/LVTTL-compatible digital control; selects between two factory-programmed frequencies; internal 50 kΩ pulldown |
| VEE | Negative power supply | Ground reference for LVPECL outputs; must be connected to system ground |
| Q / nQ | Differential clock outputs | LVPECL-compliant complementary outputs; require 50 Ω termination to VCC – 2 V; 0.4–1.0 V peak-to-peak swing |
| VCC | Positive power supply | Accepts 2.5 V or 3.3 V ±5%; powers core logic and output drivers; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-programmed frequencies | Enables dynamic clock switching in multi-standard radios without external reprogramming or firmware update |
| FemtoClock® NG fractional-N PLL | Delivers <0.5 ps RMS phase jitter at 622.08 MHz while supporting arbitrary frequencies across two wide bands |
| Programmable VCXO pull range & polarity | Allows optimization for specific loop filter design and stability requirements in PLL-based synchronization systems |
| LVCMOS/LVTTL FSEL interface | Eliminates need for level-shifting circuitry when interfacing with FPGA GPIO or ASIC control logic |
| Industrial temperature range | Validated operation from -40°C to +85°C ensures reliability in outdoor macrocell and remote radio head environments |
Applications
| Wireless Base Station Fronthaul | CPRI/Ethernet Synchronization |
|---|---|
Use Scenario: Timing recovery and clock forwarding in eCPRI-capable RU-DU split architectures requiring sub-100 ps jitter performance. IC Role / Device Role / Timing Role: Primary VCXO providing low-jitter reference for SERDES and JESD204B converters; FSEL toggled during mode change (e.g., TDD/FDD reconfiguration). Use Value: Dual-frequency capability eliminates need for separate oscillators during band-switching events, reducing BOM count and PCB footprint. |
Use Scenario: Stratum-3E-compliant clock source in packet-based synchronization gateways handling IEEE 1588 PTP and SyncE. IC Role / Device Role / Timing Role: VCXO referenced by digital PLL to absorb wander and suppress packet delay variation; VC input driven by loop filter output. Use Value: Factory-programmable pull range and polarity allow precise matching to DPLL loop dynamics, improving holdover stability and transient response. |
| Optical Transport Line Cards | High-Speed Data Converter Clocking |
Use Scenario: Reference clock for OTU2/OTU3/OTU4 framers and FEC engines in metro/core DWDM line cards. IC Role / Device Role / Timing Role: Low-phase-noise LVPECL oscillator feeding CDR circuits; operates at 622.08 MHz, 1.244 Gbps, or 2.488 Gbps rates. Use Value: 0.46 ps RMS phase jitter (12 kHz–20 MHz) meets GR-1244-CORE mask requirements for OC-48/STM-16 and beyond. |
Use Scenario: Sampling clock for 16-bit+ ADCs/DACs in radar and broadband test equipment demanding ultra-low aperture jitter. IC Role / Device Role / Timing Role: Direct LVPECL drive of converter clock inputs; Q/nQ outputs matched to minimize skew-induced sampling error. Use Value: Differential LVPECL output with 45–55% duty cycle and <12 ps cycle-to-cycle jitter preserves ENOB in >1 GSPS converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-B-GM | Quad-output, I²C-programmable clock generator; no built-in crystal; requires external XTAL; higher integration but larger 4×4 mm QFN | Used where multiple synchronized clocks (e.g., data path + SerDes + processor) are needed from one device | Choose Si5338A-B-GM if system-level clock tree consolidation is prioritized over lowest jitter per output |
| 8N3SV78EC-0075CDI8 | Single-frequency LVPECL VCXO (not dual-frequency); same package, same FemtoClock NG platform; ±50 ppm stability option (code E) | Preferred in cost-sensitive, fixed-configuration designs where frequency agility is unnecessary | Choose 8N3SV78EC-0075CDI8 if only one stable frequency is required and FSEL control adds complexity |
Compared with 8N3DV85AC-0178CDI8, the Si5338A-B-GM trades single-output jitter performance for multi-output flexibility and programmability, while the 8N3SV78EC-0075CDI8 simplifies design by removing dual-frequency logic and associated control routing - both alternatives retain the same ceramic package and industrial temperature rating.
Availability
8N3DV85AC-0178CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport, and high-speed data converter applications requiring stable component supply, guaranteed long-term availability, and traceable sourcing.
Supply support for 8N3DV85AC-0178CDI8 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.
The 8N3DV85AC-0178CDI8 belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for high-performance, low-jitter clocking in 4G/5G wireless infrastructure, optical networking, and test & measurement systems.
FAQ
What is the factory-programmed frequency pair for 8N3DV85AC-0178CDI8?
The 8N3DV85AC-0178CDI8 is factory-programmed with two specific frequencies defined by its order code suffix "0178". Per IDT's ordering documentation, "0178" corresponds to default frequencies of 156.25 MHz and 122.88 MHz - both within the 15.476–866.67 MHz band - with a VCXO pull range of ±50 ppm. These values are permanently stored in ROM and cannot be altered in the field.
Does 8N3DV85AC-0178CDI8 support 2.5 V and 3.3 V supplies simultaneously?
No, the 8N3DV85AC-0178CDI8 operates from either a 2.5 V ±5% or a 3.3 V ±5% supply - not both. The supply voltage is fixed at time of manufacture and encoded in the option code: "A" denotes 3.3 V, "B" denotes 2.5 V. The 8N3DV85AC-0178CDI8 uses option code "A", confirming it is configured for 3.3 V operation with ±100 ppm frequency stability over temperature.
How does the FSEL pin affect output settling time in 8N3DV85AC-0178CDI8?
The FSEL pin triggers immediate frequency switching between the two factory-programmed outputs, with a specified settling time of ≤1 ms (tSET) after FSEL state change. This behavior is enabled by the internal ROM-stored configuration registers and fractional-N PLL architecture. During transition, the 8N3DV85AC-0178CDI8 maintains valid LVPECL output levels without interruption - critical for hitless frequency handover in telecom systems.
What termination is required for the LVPECL outputs of 8N3DV85AC-0178CDI8?
The 8N3DV85AC-0178CDI8 Q/nQ outputs require DC-coupled 50 Ω termination to VCC – 2 V. For 3.3 V operation, this equals 1.3 V; recommended layouts include dual 84 Ω resistors (Figure 1A) or 125 Ω resistors (Figure 1B) per output leg. Improper termination causes signal integrity degradation, increased jitter, and duty cycle distortion - all directly impacting the 8N3DV85AC-0178CDI8's specified 45–55% output duty cycle and <0.5 ps jitter performance.
Is 8N3DV85AC-0178CDI8 compliant with RoHS and REACH regulations?
Yes, the 8N3DV85AC-0178CDI8 is RoHS 6-compliant (lead-free) and REACH-conformant, as confirmed by its "CD" package code and explicit statement in the datasheet: "lead-free (RoHS 6) 6-lead ceramic 5mm x 7mm x 1.55mm package." The device contains no intentionally added substances restricted under Annex XIV of REACH, and full material declarations are available upon request from Renesas for 8N3DV85AC-0178CDI8.
8N3DV85AC-0178CDI8 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:
- 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-0178CDI8 FAQ
1.How can I place an order for 8N3DV85AC-0178CDI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N3DV85AC-0178CDI8 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-0178CDI8 reliable?
The price and inventory of 8N3DV85AC-0178CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3DV85AC-0178CDI8 is usually 5 days.
3.What payment methods are accepted for 8N3DV85AC-0178CDI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3DV85AC-0178CDI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N3DV85AC-0178CDI8?
8N3DV85AC-0178CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N3DV85AC-0178CDI8 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-0178CDI8?
For technical support, including 8N3DV85AC-0178CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3DV85AC-0178CDI8 requirements.
6.How does Aetrix verify that 8N3DV85AC-0178CDI8 is sourced from the original manufacturer or authorized distributors?
All 8N3DV85AC-0178CDI8 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-0178CDI8 meets industry standards.
7.What is the process for return or replacement of 8N3DV85AC-0178CDI8?
All 8N3DV85AC-0178CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N3DV85AC-0178CDI8, 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-0178CDI8 part is unused and in its original packaging.
Return procedure for 8N3DV85AC-0178CDI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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