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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Programmable Timers and Oscillators

Renesas 8N3QV01EG-0081CDI8

Name: 8N3QV01EG-0081CDI8
Brand: Renesas
SKU: 8N3QV01EG-0081CDI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N3QV01EG-0081CDI8

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N3QV01EG-0081CDI8.pdf

Description:: IC OSC VCXO QD FREQ 10-CLCC

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Product details

Overview

8N3QV01EG-0081CDI8 from Renesas Electronics is a quad-frequency programmable VCXO using fourth-generation FemtoClock® NG technology, delivering LVPECL differential output (15.476–866.67 MHz and 975–1,300 MHz), ±4.5 to ±754.5 ppm absolute pull range, and 0.487 ps RMS phase jitter (12 kHz–20 MHz) at 156.25 MHz. It serves as a high-stability, software-reconfigurable clock source in wireless infrastructure baseband units.

For engineers reviewing the 8N3QV01EG-0081CDI8 datasheet, 8N3QV01EG-0081CDI8 pinout, 8N3QV01EG-0081CDI8 application, or 8N3QV01EG-0081CDI8 equivalent, this page provides verified technical context, I²C-programmable frequency synthesis details, LVPECL termination guidance, and validated alternative options for telecom timing systems requiring multi-frequency agility and low-jitter performance.

Technical Context

The 8N3QV01EG-0081CDI8 integrates a 114.285 MHz 3rd-overtone crystal oscillator, a fractional-N PLL with 7-bit integer + 18-bit fractional feedback divider (MINT/MFRAC), pre-divider (P), and 7-bit post-divider (N), enabling precise frequency synthesis across two disjoint bands. Its I²C interface allows runtime reprogramming of all four factory-default frequency configurations stored in volatile registers.

It features dual supply support (2.5 V or 3.3 V), LVCMOS/LVTTL-compatible control inputs (FSEL0/FSEL1/OE), and an internal ADC-based VCXO control path with programmable oscillator gain (7.57–477.27 ppm/V). The device operates from –40°C to +85°C and uses a ceramic 10-lead 5 mm × 7 mm × 1.55 mm package with RoHS 6 compliance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency Range	15.476–866.67 MHz and 975–1,300 MHz; supports wideband RF sampling and SerDes line rates via fractional-N synthesis.
RMS Phase Jitter (12 kHz–20 MHz)	0.487 ps typical at 156.25 MHz; meets stringent OC-192/SONET and 10G Ethernet jitter budgets.
Absolute Pull Range (APR)	Programmable ±4.5 to ±754.5 ppm; enables fine-tuning for network synchronization (e.g., IEEE 1588 PTP, SyncE).
Supply Voltage	2.5 V or 3.3 V ±5%; dual-voltage compatibility simplifies integration into mixed-supply telecom platforms.
Operating Temperature	–40°C to +85°C ambient; qualified for outdoor wireless infrastructure and carrier-grade networking equipment.
Output Interface	LVPECL differential (Q/nQ); delivers robust 0.55–1.0 Vpp swing into 50 Ω, compatible with FPGA transceivers and ASIC clock inputs.
Frequency Resolution	435.9 Hz ÷ N (N = post-divider); enables sub-Hz tuning granularity for precision frequency calibration.

Pinout & Package

Package: 10-lead ceramic CLCC (CD package), 5 mm × 7 mm × 1.55 mm body, lead-free (RoHS 6), 2.54 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 - VC	VCXO control voltage input	Analog tuning port; sets output frequency deviation via externally applied voltage (0–VCC), gain programmable via ADC_GAIN[5:0].
2 - OE	Output enable (active-high)	Asynchronous LVCMOS/LVTTL input; forces Q/nQ into high-impedance state when low, enabling clock gating without signal contention.
3 - VEE	Negative power supply	Ground reference for LVPECL outputs; must be connected to system ground (0 V) per datasheet layout guidelines.
4 - FSEL0	Default frequency select bit 0	LVCMOS/LVTTL input with internal pulldown; selects one of four power-up frequencies (00/01/10/11) mapped to register sets P₀–P₃, MINT₀–MINT₃, etc.
5 - FSEL1	Default frequency select bit 1	LVCMOS/LVTTL input with internal pulldown; used with FSEL0 to determine initial configuration; reprogrammable via I²C after power-up.
6 - Q	Differential clock output (+)	LVPECL output; requires 50 Ω termination to VCC – 2 V (3.3 V → 1.3 V; 2.5 V → 0.5 V) for proper logic levels and jitter performance.
7 - nQ	Differential clock output (–)	Complementary LVPECL output; paired with Q to deliver low-skew, noise-rejecting differential signaling to high-speed receivers.
8 - VCC	Positive power supply	2.5 V or 3.3 V supply; decoupling (0.1 µF + 10 µF) required adjacent to pin per schematic layout recommendations.
9 - SDATA	I²C data (bidirectional, open-drain)	Serial interface for programming registers; pulled up internally (50 kΩ); supports read/write of P/M/N dividers, APR, polarity, and gain settings.
10 - SCLK	I²C clock input	LVCMOS/LVTTL-compatible clock input; internal 50 kΩ pullup; defines I²C transaction timing for frequency and control register updates.

Key Features

Feature	Design Value
Quad default frequency selection	Four factory-programmed configurations (e.g., 100/122.88/125/156.25 MHz) selected by FSEL[1:0]; enables boot-time clock agility without I²C initialization.
Fractional-N PLL with delta-sigma modulation	Enables ultra-fine frequency resolution (sub-Hz) and optimized phase noise via noise shaping-critical for 5G NR and CPRI applications.
Programmable oscillator gain (KV)	Configurable from 7.57 ppm/V to 477.27 ppm/V via ADC_GAIN[5:0]; allows APR scaling to match loop filter design and stability requirements.
LVPECL output with 45–55% duty cycle	Ensures minimal duty-cycle distortion across full frequency range, preserving timing margins in high-speed serial links (e.g., JESD204B).
Startup time ≤20 ms	Meets fast-boot requirements in carrier-class systems; output stabilizes within 20 ms of VCC reaching regulation, with frequency settling <470 µs after FSEL change.

Applications

5G Baseband Unit Timing	Synchronization Equipment (SyncE/PTP)
Use Scenario: Provides multiple synchronized clock outputs for FPGA-based digital front-end processing, ADC/DAC sampling, and CPRI/eCPRI interface timing in active antenna systems. IC Role / Device Role / Timing Role: Quad-frequency VCXO serving as master clock generator with I²C-reprogrammable outputs and tight phase jitter for RF sampling clocks. Use Value: Enables dynamic reconfiguration between TDD/FDD modes and band-specific sampling rates without hardware changes or clock tree redesign.	Use Scenario: Delivers traceable, low-jitter reference clocks to boundary clocks and transparent clocks in packet-based timing networks compliant with ITU-T G.8262/G.8272. IC Role / Device Role / Timing Role: High-stability VCXO with programmable APR and temperature-compensated pull range for holdover and recovery during PTP grandmaster loss. Use Value: Meets ±50 ppb wander tolerance and sub-100 fs jitter requirements for EEC Option 2 compliance in metro aggregation nodes.
Optical Transport Line Cards	High-Speed Test & Measurement
Use Scenario: Generates precise 156.25 MHz, 311.04 MHz, and 622.08 MHz clocks for OTU2/OTU3/OTU4 framers and FEC engines in DWDM line systems. IC Role / Device Role / Timing Role: Programmable VCXO with dual-band operation and factory-set defaults for SONET/SDH/OTN line rate families. Use Value: Eliminates need for multiple fixed XO variants; single BOM item supports multiple line card SKUs via software-defined frequency selection.	Use Scenario: Supplies ultra-low-jitter reference to high-resolution oscilloscopes, bit error ratio testers (BERTs), and arbitrary waveform generators requiring sub-picosecond timing stability. IC Role / Device Role / Timing Role: Calibration-grade VCXO with 0.487 ps RMS jitter and programmable APR for instrument-level clock source validation. Use Value: Reduces measurement uncertainty in jitter decomposition and spectral purity analysis by minimizing intrinsic oscillator phase noise floor.

5G Baseband Unit Timing

Synchronization Equipment (SyncE/PTP)

Use Scenario: Provides multiple synchronized clock outputs for FPGA-based digital front-end processing, ADC/DAC sampling, and CPRI/eCPRI interface timing in active antenna systems.

IC Role / Device Role / Timing Role: Quad-frequency VCXO serving as master clock generator with I²C-reprogrammable outputs and tight phase jitter for RF sampling clocks.

Use Value: Enables dynamic reconfiguration between TDD/FDD modes and band-specific sampling rates without hardware changes or clock tree redesign.

Use Scenario: Delivers traceable, low-jitter reference clocks to boundary clocks and transparent clocks in packet-based timing networks compliant with ITU-T G.8262/G.8272.

IC Role / Device Role / Timing Role: High-stability VCXO with programmable APR and temperature-compensated pull range for holdover and recovery during PTP grandmaster loss.

Use Value: Meets ±50 ppb wander tolerance and sub-100 fs jitter requirements for EEC Option 2 compliance in metro aggregation nodes.

Optical Transport Line Cards

High-Speed Test & Measurement

Use Scenario: Generates precise 156.25 MHz, 311.04 MHz, and 622.08 MHz clocks for OTU2/OTU3/OTU4 framers and FEC engines in DWDM line systems.

IC Role / Device Role / Timing Role: Programmable VCXO with dual-band operation and factory-set defaults for SONET/SDH/OTN line rate families.

Use Value: Eliminates need for multiple fixed XO variants; single BOM item supports multiple line card SKUs via software-defined frequency selection.

Use Scenario: Supplies ultra-low-jitter reference to high-resolution oscilloscopes, bit error ratio testers (BERTs), and arbitrary waveform generators requiring sub-picosecond timing stability.

IC Role / Device Role / Timing Role: Calibration-grade VCXO with 0.487 ps RMS jitter and programmable APR for instrument-level clock source validation.

Use Value: Reduces measurement uncertainty in jitter decomposition and spectral purity analysis by minimizing intrinsic oscillator phase noise floor.

Equivalent & Alternatives

The following parts are listed as comparable options for similar VCXO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT8T49N242A-001	Fixed 4-output LVDS XO (not VCXO); no APR or I²C programming; ±25 ppm stability; 100–750 MHz range.	Lacks voltage-controlled tuning and reprogrammability; suitable only for static clock trees where frequency agility is unnecessary.	Select when deterministic, non-adjustable timing is sufficient and cost sensitivity outweighs flexibility needs.
Si5338A-B-GM	4-output clock generator with integrated crystal; supports I²C/JESD204B; wider output range (0.16–350 MHz); higher power consumption (120 mA vs. 145–150 mA).	Includes on-chip crystal and multi-format outputs (LVDS/LVPECL/LVCMOS); lacks VCXO pull-range capability and dedicated analog VC input.	Choose when multi-format clock distribution and embedded crystal simplify BOM, but VCXO functionality is not required.

Compared with IDT8T49N242A-001 and Si5338A-B-GM, the 8N3QV01EG-0081CDI8 uniquely combines quad-frequency boot agility, analog VCXO tuning, sub-0.5 ps jitter, and fractional-N synthesis in a compact ceramic package-making it optimal for telecom systems demanding both precision and programmability.

Availability

8N3QV01EG-0081CDI8 is available at Aetrix Electronics and suitable for 5G baseband units, SyncE boundary clocks, optical transport line cards, and high-speed test instrumentation requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 8N3QV01EG-0081CDI8 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 specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and communications markets.

The 8N3QV01EG-0081CDI8 belongs to Renesas' FemtoClock® NG high-performance clock family, designed specifically for wireless infrastructure, telecom synchronization, and high-speed serial interface timing where ultra-low jitter and software-defined frequency agility are critical.

FAQ

What is the default output frequency configuration for 8N3QV01EG-0081CDI8?

The 8N3QV01EG-0081CDI8 is factory-programmed with four default frequencies determined by its order code suffix "0081". Per Renesas' ordering documentation, "0081" corresponds to 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz-selected at power-up via FSEL0/FSEL1. These values are stored in volatile I²C registers and can be overwritten via I²C after boot.

Does 8N3QV01EG-0081CDI8 support both 2.5 V and 3.3 V supply operation?

Yes, 8N3QV01EG-0081CDI8 supports dual supply voltages: 2.5 V ±5% or 3.3 V ±5%. The device automatically adapts internal biasing and output drive strength. DC characteristics-including LVPECL output swing (0.55–1.0 Vpp), supply current (145 mA @ 2.5 V, 150 mA @ 3.3 V), and input thresholds-are fully specified for both rails.

How is the absolute pull range (APR) programmed on 8N3QV01EG-0081CDI8?

The APR of 8N3QV01EG-0081CDI8 is programmed via the ADC_GAIN[5:0] register over I²C, setting oscillator gain from ±4.5 ppm to ±754.5 ppm. Gain is calculated as (25 × ADC_GAIN) ÷ VCC (ppm/V); for example, ADC_GAIN = 0x3F at 3.3 V yields 477.27 ppm/V, resulting in ±754.5 ppm APR at full 0–VCC VC swing.

What termination is required for the LVPECL outputs of 8N3QV01EG-0081CDI8?

8N3QV01EG-0081CDI8 LVPECL outputs (Q/nQ) require 50 Ω differential termination to VCC – 2 V. For 3.3 V operation, use two 84 Ω resistors to 1.3 V (Figure 1A) or 125 Ω resistors to 3.3 V (Figure 1B). For 2.5 V, terminate to ground using 50 Ω resistors (Figure 2C), as VCC – 2 V ≈ 0.5 V ≈ ground.

Can the 8N3QV01EG-0081CDI8 be used in place of a fixed-frequency XO?

Yes-8N3QV01EG-0081CDI8 can emulate a fixed XO by disabling I²C writes and holding FSEL0/FSEL1 constant to select one default frequency. Its ±10 ppm initial accuracy, ±20 ppm stability (option K), and ±3 ppm aging meet or exceed typical XO specs, while retaining VCXO tunability if needed later.

8N3QV01EG-0081CDI8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 10-CLCC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: VCXO

Count:: -

Frequency:: 125MHz, 156.25MHz, 250MHz, 312.5MHz

Voltage - Supply:: 3.135V ~ 3.465V

Current - Supply:: 150 mA

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 10-CLCC (7x5)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

8N3QV01EG-0081CDI8 FAQ

1.How can I place an order for 8N3QV01EG-0081CDI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N3QV01EG-0081CDI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of 8N3QV01EG-0081CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3QV01EG-0081CDI8 is usually 5 days.

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8N3QV01EG-0081CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N3QV01EG-0081CDI8 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 8N3QV01EG-0081CDI8?

For technical support, including 8N3QV01EG-0081CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3QV01EG-0081CDI8 requirements.

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All 8N3QV01EG-0081CDI8 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 8N3QV01EG-0081CDI8 meets industry standards.

7.What is the process for return or replacement of 8N3QV01EG-0081CDI8?

All 8N3QV01EG-0081CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N3QV01EG-0081CDI8, 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 8N3QV01EG-0081CDI8 part is unused and in its original packaging.

Return procedure for 8N3QV01EG-0081CDI8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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