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

Renesas 8N3QV01EG-0081CDI

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

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Part No.:: 8N3QV01EG-0081CDI

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N3QV01EG-0081CDI.pdf

Description:: IC OSC VCXO QD FREQ 10CLCC

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Product details

Overview

8N3QV01EG-0081CDI from Renesas Electronics is a quad-frequency programmable VCXO using fourth-generation FemtoClock® NG technology, delivering LVPECL differential clock output with RMS phase jitter of 0.487ps (12kHz–20MHz) at 156.25MHz, absolute pull-range programmable from ±4.5 to ±754.5ppm, and operation across –40°C to +85°C ambient temperature - deployed in wireless infrastructure baseband timing and telecom line-card synchronization.

For engineers reviewing the 8N3QV01EG-0081CDI datasheet, 8N3QV01EG-0081CDI pinout, 8N3QV01EG-0081CDI application, or 8N3QV01EG-0081CDI equivalent, this page provides verified functional specifications, I²C-programmable frequency synthesis architecture, FSEL-controlled default frequency selection, and LVPECL termination guidance for high-stability clock distribution in 5G fronthaul and packet-switched network equipment.

Technical Context

The 8N3QV01EG-0081CDI implements a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, driven by a 114.285MHz 3rd-overtone crystal oscillator, enabling precise frequency synthesis from 15.476MHz to 866.67MHz and 975MHz to 1300MHz with 435.9Hz ÷N resolution. Its VCO operates at 1950–2600MHz, followed by a 7-bit post-divider (N) and 2-bit pre-divider (P).

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are selected via FSEL0/FSEL1 pins at power-up and reprogrammable over I²C; all registers are volatile and reload factory defaults on power cycle. The device supports programmable oscillator gain (KV) from 7.57ppm/V to 477.27ppm/V via ADC_GAIN[5:0], with VC input linearity (BSL) within ±0.1%.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency Range	15.476–866.67MHz and 975–1300MHz; covers Ethernet, CPRI, OTU4, and 5G NR FR1/FR2 reference clocks.
RMS Phase Jitter (156.25MHz)	0.487ps (12kHz–20MHz); meets stringent OC-192/SONET and IEEE 1588 boundary clock requirements.
Absolute Pull Range (APR)	Programmable ±4.5 to ±754.5ppm; enables wide-loop PLL designs and robust holdover in syncE applications.
Supply Voltage	2.5V or 3.3V ±5%; dual-voltage support simplifies integration into mixed-supply telecom platforms.
Operating Temperature	–40°C to +85°C; qualified for industrial-grade wireless infrastructure and carrier-grade networking hardware.
Output Interface	LVPECL differential (Q/nQ); requires 50Ω termination to VCC–2V and delivers 0.55–1.0V peak-to-peak swing.
Frequency Resolution	435.9Hz ÷N (N = post-divider); enables sub-Hz tuning granularity for precision frequency alignment.

Pinout & Package

Package: 10-lead ceramic CLCC (CD package), 5mm × 7mm × 1.55mm, RoHS 6-compliant, surface-mount.

Pin/Terminal	Circuit Role	Design Meaning
1 - VC	VCXO control voltage input	Analog tuning port; sets output frequency deviation via programmable KV gain (7.57–477.27ppm/V); 500kΩ input resistance.
2 - OE	Output enable (LVCMOS/LVTTL)	Asynchronous active-high control; drives Q/nQ into high-Z when low; internal pullup ensures enabled state at power-up.
3 - VEE	Negative supply rail	Ground reference for LVPECL outputs; must be connected to system ground (0V) per datasheet.
4 - FSEL0	Default frequency select (LSB)	Configures one of four factory-programmed PLL register sets (P₀–P₃, MINT₀–MINT₃, etc.) at power-up; internal pulldown.
5 - FSEL1	Default frequency select (MSB)	Paired with FSEL0 to select among four default frequencies (e.g., 100/122.88/125/156.25MHz); internal pulldown.
6 - Q	Differential LVPECL output (+)	High-speed clock output; requires 50Ω termination to VCC–2V; 100–425ps rise/fall time.
7 - nQ	Differential LVPECL output (–)	Complementary to Q; forms balanced pair for EMI reduction and jitter suppression in backplane routing.
8 - VCC	Positive supply (2.5V or 3.3V)	Core and output driver supply; decoupling with 0.1µF (near pin) and 10µF (bulk) required for <0.5ps jitter performance.
9 - SDATA	I²C bidirectional data (open-drain)	Serial interface for writing PLL registers, APR, and ADC_GAIN; internal pullup; compatible with standard I²C masters.
10 - SCLK	I²C clock input	Master-generated clock for register access; LVCMOS/LVTTL-compatible; internal pullup ensures idle-high state.

Key Features

Feature	Design Value
Quad default frequency selection	FSEL0/FSEL1 pins directly map to four independent PLL configurations, enabling instant frequency switching without I²C transaction overhead.
Programmable APR and KV gain	ADC_GAIN[5:0] register adjusts oscillator sensitivity from ±4.5ppm to ±754.5ppm pull range, optimizing loop bandwidth for specific PLL stability targets.
Fractional-N synthesis with delta-sigma modulation	18-bit MFRAC + 7-bit MINT enables ultra-fine frequency resolution while shaping quantization noise away from critical offset bands (e.g., 12kHz–20MHz).
Low-noise 114.285MHz crystal reference	3rd-overtone fundamental-mode crystal minimizes phase noise multiplication; contributes to 0.487ps RMS jitter at 156.25MHz.
Volatile I²C register architecture	All PLL settings stored in SRAM; allows field reprogramming and dynamic frequency updates, with automatic restore of factory defaults on power cycle.

Applications

Wireless Baseband Unit Timing	SyncE Line Card Clocking
Use Scenario: Providing synchronized reference clocks to FPGA-based digital front-end (DFE) and analog front-end (AFE) in massive MIMO 5G base stations. IC Role / Device Role / Timing Role: Primary VCXO source for JESD204B/JESD204C converter sampling clocks and eCPRI fronthaul PHY layer timing. Use Value: Sub-0.5ps RMS jitter ensures <10⁻¹⁵ BER in high-order QAM demodulation; quad-frequency capability supports multi-band carrier aggregation without external multiplexing.	Use Scenario: Delivering traceable, holdover-capable clock signals to Ethernet switch ASICs and PTP grandmaster controllers in metro aggregation nodes. IC Role / Device Role / Timing Role: Stratum 3E-compliant VCXO serving as the primary timing source for ITU-T G.8262 SyncE EEC-Option 1 compliance. Use Value: Programmable ±754.5ppm APR enables robust lock acquisition during network synchronization loss; industrial temperature rating ensures uptime in uncontrolled cabinet environments.
Optical Transport Network (OTN) FEC Timing	High-Speed Data Converter Reference
Use Scenario: Generating precise 155.52MHz, 156.25MHz, and 311.04MHz clocks for OTU2/OTU3/OTU4 forward error correction (FEC) engines in DWDM line cards. IC Role / Device Role / Timing Role: Low-jitter VCXO feeding clock inputs of FEC ASICs and SerDes blocks requiring deterministic latency and minimal cycle-to-cycle variation. Use Value: 0.487ps RMS jitter (12kHz–20MHz) prevents bit errors in 100G+ coherent optical modems; I²C programmability allows runtime adaptation to different OTU frame rates.	Use Scenario: Supplying sampling clocks to 16-bit, 250MSPS ADCs/DACs in software-defined radio (SDR) transceivers and radar signal processors. IC Role / Device Role / Timing Role: High-stability, low-phase-noise clock generator for RF sampling architectures where aperture jitter directly impacts ENOB. Use Value: 0.614ps RMS phase jitter (1kHz–40MHz) preserves >14.5 ENOB at Nyquist; LVPECL output drives ADC clock inputs with minimal added jitter via proper termination.

Wireless Baseband Unit Timing

SyncE Line Card Clocking

Use Scenario: Providing synchronized reference clocks to FPGA-based digital front-end (DFE) and analog front-end (AFE) in massive MIMO 5G base stations.

IC Role / Device Role / Timing Role: Primary VCXO source for JESD204B/JESD204C converter sampling clocks and eCPRI fronthaul PHY layer timing.

Use Value: Sub-0.5ps RMS jitter ensures <10⁻¹⁵ BER in high-order QAM demodulation; quad-frequency capability supports multi-band carrier aggregation without external multiplexing.

Use Scenario: Delivering traceable, holdover-capable clock signals to Ethernet switch ASICs and PTP grandmaster controllers in metro aggregation nodes.

IC Role / Device Role / Timing Role: Stratum 3E-compliant VCXO serving as the primary timing source for ITU-T G.8262 SyncE EEC-Option 1 compliance.

Use Value: Programmable ±754.5ppm APR enables robust lock acquisition during network synchronization loss; industrial temperature rating ensures uptime in uncontrolled cabinet environments.

Optical Transport Network (OTN) FEC Timing

High-Speed Data Converter Reference

Use Scenario: Generating precise 155.52MHz, 156.25MHz, and 311.04MHz clocks for OTU2/OTU3/OTU4 forward error correction (FEC) engines in DWDM line cards.

IC Role / Device Role / Timing Role: Low-jitter VCXO feeding clock inputs of FEC ASICs and SerDes blocks requiring deterministic latency and minimal cycle-to-cycle variation.

Use Value: 0.487ps RMS jitter (12kHz–20MHz) prevents bit errors in 100G+ coherent optical modems; I²C programmability allows runtime adaptation to different OTU frame rates.

Use Scenario: Supplying sampling clocks to 16-bit, 250MSPS ADCs/DACs in software-defined radio (SDR) transceivers and radar signal processors.

IC Role / Device Role / Timing Role: High-stability, low-phase-noise clock generator for RF sampling architectures where aperture jitter directly impacts ENOB.

Use Value: 0.614ps RMS phase jitter (1kHz–40MHz) preserves >14.5 ENOB at Nyquist; LVPECL output drives ADC clock inputs with minimal added jitter via proper termination.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
8N3QV01LG-0081CDI	Same pinout and architecture, but ±20ppm initial accuracy (K option) vs. ±50ppm (E option) in 8N3QV01EG-0081CDI; tighter stability spec.	Required for Stratum 3E deployments demanding <±33ppm total stability over 10 years; not needed for general-purpose baseband timing.	Select when long-term aging and temperature drift budgets are constrained; otherwise, 8N3QV01EG-0081CDI offers optimal cost/performance balance.
8A34002NLGI-0081CDI	Dual-output, JESD204B-compliant clock generator with integrated jitter cleaner; higher integration, no VCXO tuning; 0.23ps jitter (12kHz–20MHz).	Used in systems requiring multiple synchronized clocks (e.g., ADC + DAC + FPGA) with sub-0.3ps jitter; lacks APR programmability and direct VCXO control.	Choose for complex multi-clock domain systems needing jitter attenuation; retain 8N3QV01EG-0081CDI when single-output VCXO control and wide APR are mandatory.

Compared with 8N3QV01LG-0081CDI, the 8N3QV01EG-0081CDI trades tighter initial accuracy for broader APR flexibility and lower cost; versus 8A34002NLGI-0081CDI, it provides dedicated VCXO functionality with tunable pull range but requires external loop filtering for PLL applications.

Availability

8N3QV01EG-0081CDI is available at Aetrix Electronics and suitable for wireless infrastructure, telecom line-card timing, and high-speed data converter reference applications requiring stable component supply, guaranteed RoHS 6 compliance, and industrial temperature qualification.

Supply support for 8N3QV01EG-0081CDI 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 advanced timing solutions for industrial, automotive, and communications markets.

The 8N3QV01EG-0081CDI belongs to Renesas' FemtoClock® NG high-performance clock family, engineered specifically for low-jitter, programmable frequency synthesis in 5G, optical transport, and packet-synchronized networks.

FAQ

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

The 8N3QV01EG-0081CDI is factory-programmed with four default frequencies determined by its order code suffix "0081"; per Renesas' ordering documentation, "0081" corresponds to 100MHz, 122.88MHz, 125MHz, and 156.25MHz - selectable via FSEL0/FSEL1 pins at power-up. These values are stored in volatile I²C registers P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, and N₀–N₃, and may be overwritten via I²C after boot.

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

Yes, 8N3QV01EG-0081CDI supports dual-supply operation: VCC may be either 2.5V ±5% or 3.3V ±5%, as indicated by the "E" option code (VCC = 3.3V ±5%, ±50ppm stability). The device automatically adapts LVPECL output levels and internal biasing; DC characteristics including VOH, VOL, and power supply current differ per voltage mode and are fully specified in Tables 5A and 5B of the datasheet.

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

The APR of 8N3QV01EG-0081CDI is programmed via the ADC_GAIN[5:0] register over I²C, which configures oscillator gain (KV) from 7.57ppm/V to 477.27ppm/V. With VC input range of 0–VCC, this yields an APR of ±4.5ppm (ADC_GAIN = 000001, VCC = 3.3V) up to ±754.5ppm (ADC_GAIN = 111111, VCC = 3.3V). The relationship is linear: APR = KV × VCC/2. No external components are required.

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

8N3QV01EG-0081CDI's Q/nQ LVPECL outputs require 50Ω differential termination to VCC – 2V. For 3.3V operation, Figure 1A/B in the datasheet shows 84Ω pull-downs to 3.3V and 125Ω to ground; for 2.5V, Figure 2C recommends 50Ω terminations directly to ground. Improper termination causes signal integrity degradation, increased jitter (>1ps), and potential output stage damage due to DC current imbalance.

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

Yes - 8N3QV01EG-0081CDI can operate as a fixed-frequency XO by programming only one of its four PLL configurations and holding FSEL0/FSEL1 static; its fractional-N synthesizer achieves frequency accuracy better than ±10ppm (initial) and ±3ppm (10-year aging), matching or exceeding typical XO specs. However, unlike XOs, it retains full VCXO functionality: APR tuning, I²C reprogramming, and fast frequency switching remain available if needed later.

8N3QV01EG-0081CDI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 10-CLCC

Packaging:: Tray

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-0081CDI FAQ

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

Please submit a Request for Quotation (RFQ) for 8N3QV01EG-0081CDI 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-0081CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3QV01EG-0081CDI is usually 5 days.

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

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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-0081CDI?

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

6.How does Aetrix verify that 8N3QV01EG-0081CDI is sourced from the original manufacturer or authorized distributors?

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

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

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

Return procedure for 8N3QV01EG-0081CDI:

1.Submit a request within 90 days.

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

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