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

Renesas 8N3QV01AG-0081CDI8

Name: 8N3QV01AG-0081CDI8
Brand: Renesas
SKU: 8N3QV01AG-0081CDI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N3QV01AG-0081CDI8

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N3QV01AG-0081CDI8.pdf

Description:: IC OSC VCXO QD FREQ 10CLCC

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Product details

Overview

8N3QV01AG-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 975–1300 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 - deployed in wireless infrastructure baseband timing and telecom line-card clock synthesis.

For engineers reviewing the 8N3QV01AG-0081CDI8 datasheet, 8N3QV01AG-0081CDI8 pinout, 8N3QV01AG-0081CDI8 application, or 8N3QV01AG-0081CDI8 equivalent, this page provides verified package mapping (CD10 ceramic 5 mm × 7 mm), I²C-programmable PLL register architecture (P/MINT/MFRAC/N), FSEL0/FSEL1 default frequency selection logic, and confirmed LVPECL termination requirements per JEDEC-compliant 50 Ω differential routing.

Technical Context

The 8N3QV01AG-0081CDI8 integrates a 114.285 MHz 3rd-overtone crystal oscillator with a fractional-N PLL featuring 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, enabling sub-Hz frequency resolution (435.9 Hz ÷ N). Its VCO operates at 1950–2600 MHz, followed by post-divider N (3–126 for standard range; N = 2 for 975–1300 MHz band).

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are selected at power-up via FSEL0/FSEL1 and reprogrammable over I²C. The device supports dual supply modes (2.5 V or 3.3 V), industrial temperature operation (−40 °C to +85 °C), and LVCMOS/LVTTL-compatible control inputs with internal pullup/pulldown resistors (50 kΩ typical).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Type	Single LVPECL differential pair (Q/nQ); requires 50 Ω termination to VCC − 2 V for signal integrity.
Frequency Range	15.476–866.67 MHz (N = 3–126) or 975–1300 MHz (N = 2); enables multi-standard compliance (e.g., 100/122.88/125/156.25 MHz defaults).
Phase Jitter (RMS)	0.487 ps (12 kHz–20 MHz integration, 156.25 MHz); meets stringent OC-192/SONET and 10G Ethernet jitter budgets.
Absolute Pull Range	Programmable ±4.5 to ±754.5 ppm via ADC_GAIN[5:0] register; supports wide-loop PLL designs and holdover stability tuning.
Supply Voltage	2.5 V ±5% or 3.3 V ±5%; dual-mode compatibility simplifies integration into mixed-voltage systems without level shifters.
Operating Temp	−40 °C to +85 °C ambient; validated for deployment in outdoor wireless base stations and carrier-grade networking equipment.
Package	RoHS-compliant 10-lead ceramic CLCC (CD10), 5 mm × 7 mm × 1.55 mm; optimized for thermal dissipation (θJA = 49.4 °C/W, no airflow).

Pinout & Package

10-lead ceramic CLCC (CD10) package, 5 mm × 7 mm × 1.55 mm body, 2.54 mm pitch, lead-free (RoHS 6), with exposed metallized bottom pad (0.70 mm × 1.65 mm) for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
1 (VC)	VCXO control voltage input	Analog tuning interface; gain programmable (7.57–477.27 ppm/V); requires clean analog supply and decoupling.
2 (OE)	Output enable (LVCMOS/LVTTL)	Asynchronous high-impedance control of Q/nQ; internal pullup ensures enabled state on power-up unless externally driven low.
3 (VEE)	Negative power supply	Ground reference for LVPECL outputs; must be solidly connected to system ground plane with low-inductance path.
4 (FSEL0)	Default frequency select (LSB)	LVCMOS/LVTTL input with internal pulldown; selects one of four factory-programmed PLL configurations at power-up.
5 (FSEL1)	Default frequency select (MSB)	LVCMOS/LVTTL input with internal pulldown; combined with FSEL0, defines initial P/M/N register set (0–3).
6 (Q)	LVPECL positive output	Differential clock output; 0.55–1.0 V peak-to-peak swing; requires matched 50 Ω trace impedance and proper termination.
7 (nQ)	LVPECL negative output	Complementary differential clock output; must be routed as length-matched pair with Q to preserve skew & jitter performance.
8 (VCC)	Positive power supply	2.5 V or 3.3 V core supply; requires local 0.1 µF + 10 µF decoupling per pin to suppress high-frequency noise coupling into PLL.
9 (SDATA)	I²C bidirectional data (open-drain)	Serial programming interface; internal pullup (50 kΩ) allows single-wire bus connection; supports volatile register writes only.
10 (SCLK)	I²C clock input	LVCMOS/LVTTL clock input with internal pullup; max 400 kHz I²C speed; used to configure frequency, APR, and polarity registers.

Key Features

Feature	Design Value
Quad default frequency selection	FSEL0/FSEL1 pins directly map to four independent PLL register sets (P₀–P₃, MINT₀–MINT₃, etc.), enabling instant frequency switching without I²C transaction overhead.
Fractional-N synthesis resolution	435.9 Hz ÷ N step size (N = post-divider) enables precise alignment to legacy and emerging standards (e.g., 156.25 MHz ± 0.001 ppm).
Volatile I²C programming	All PLL and APR registers are writable post-power-up; changes persist until next reset - ideal for field calibration and adaptive timing recovery.
Low-noise FemtoClock® NG VCO	1950–2600 MHz VCO core with delta-sigma noise shaping minimizes multiplication-induced phase noise, achieving −144.4 dBc/Hz @ 10 MHz offset.
Industrial-grade reliability	Qualified for −40 °C to +85 °C; 43,718 transistor count; 10-year aging drift ≤ ±3 ppm; junction temp limited to 112.4 °C under worst-case load.

Applications

Wireless Base Station Radio Unit	Optical Transport Network Line Card
Use Scenario: Synchronizing RF transceivers and digital front-end ASICs in 4G/5G massive MIMO radio units requiring ultra-low jitter and fast frequency agility. IC Role / Device Role / Timing Role: Primary VCXO source for FPGA-based numerically controlled oscillators (NCOs) and DAC/ADC sampling clocks. Use Value: 0.487 ps RMS jitter ensures EVM compliance below 2.5% at 256-QAM; quad-default mode enables seamless handover between TDD/FDD bands.	Use Scenario: Providing synchronous clocking for OTU4/OTU3 framer ICs and FEC engines in DWDM line cards operating across multiple protocols. IC Role / Device Role / Timing Role: Programmable reference clock generator supporting 10.709 Gbps, 43.018 Gbps, and 111.81 Gbps line rates. Use Value: I²C programmability allows dynamic reconfiguration during service provisioning; ±754.5 ppm APR supports long-holdover during network synchronization loss.
Enterprise Switch Fabric Timing	Test & Measurement Instrument Clock Source
Use Scenario: Delivering low-jitter clock to multi-port switch ASICs and SerDes PHYs in 10/25/100 GbE top-of-rack switches with strict BER requirements. IC Role / Device Role / Timing Role: System-level timing hub distributing synchronized clocks to packet processors, memory controllers, and PCIe Gen4/5 interfaces. Use Value: Dual supply support (2.5 V/3.3 V) matches ASIC I/O voltage domains; LVPECL output drives 50 Ω backplanes without signal degradation.	Use Scenario: Serving as tunable reference oscillator in high-resolution spectrum analyzers and arbitrary waveform generators requiring sub-Hz frequency resolution. IC Role / Device Role / Timing Role: Precision programmable clock source with calibrated APR and traceable frequency accuracy (±10 ppm initial). Use Value: 435.9 Hz ÷ N resolution enables exact stimulus generation for narrowband filter characterization; RMS jitter < 0.614 ps (1 kHz–40 MHz) preserves measurement SNR.

Wireless Base Station Radio Unit

Optical Transport Network Line Card

Use Scenario: Synchronizing RF transceivers and digital front-end ASICs in 4G/5G massive MIMO radio units requiring ultra-low jitter and fast frequency agility.

IC Role / Device Role / Timing Role: Primary VCXO source for FPGA-based numerically controlled oscillators (NCOs) and DAC/ADC sampling clocks.

Use Value: 0.487 ps RMS jitter ensures EVM compliance below 2.5% at 256-QAM; quad-default mode enables seamless handover between TDD/FDD bands.

Use Scenario: Providing synchronous clocking for OTU4/OTU3 framer ICs and FEC engines in DWDM line cards operating across multiple protocols.

IC Role / Device Role / Timing Role: Programmable reference clock generator supporting 10.709 Gbps, 43.018 Gbps, and 111.81 Gbps line rates.

Use Value: I²C programmability allows dynamic reconfiguration during service provisioning; ±754.5 ppm APR supports long-holdover during network synchronization loss.

Enterprise Switch Fabric Timing

Test & Measurement Instrument Clock Source

Use Scenario: Delivering low-jitter clock to multi-port switch ASICs and SerDes PHYs in 10/25/100 GbE top-of-rack switches with strict BER requirements.

IC Role / Device Role / Timing Role: System-level timing hub distributing synchronized clocks to packet processors, memory controllers, and PCIe Gen4/5 interfaces.

Use Value: Dual supply support (2.5 V/3.3 V) matches ASIC I/O voltage domains; LVPECL output drives 50 Ω backplanes without signal degradation.

Use Scenario: Serving as tunable reference oscillator in high-resolution spectrum analyzers and arbitrary waveform generators requiring sub-Hz frequency resolution.

IC Role / Device Role / Timing Role: Precision programmable clock source with calibrated APR and traceable frequency accuracy (±10 ppm initial).

Use Value: 435.9 Hz ÷ N resolution enables exact stimulus generation for narrowband filter characterization; RMS jitter < 0.614 ps (1 kHz–40 MHz) preserves measurement SNR.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-D-GM	4-output, I²C-programmable clock generator (not VCXO); no analog VC input; fixed ±50 ppm pull range.	Lacks VCXO analog tuning; suited for multi-clock fanout, not PLL reference loops requiring voltage-controlled stability.	Select when needing multiple synchronized outputs or deterministic jitter floor; avoid when VCXO loop control or holdover tuning is required.
8A34002NLGI	Ultra-low jitter (0.23 ps) femtosecond clock generator; no VCXO function; requires external crystal; higher cost and larger 32-QFN package.	Designed for jitter-critical SerDes CDR applications; lacks APR programming and FSEL-based frequency agility.	Choose for <0.3 ps jitter-critical links (e.g., 400G ZR coherent optics); not suitable for cost-sensitive VCXO replacement or analog loop integration.

Compared with Si5338A-D-GM and 8A34002NLGI, the 8N3QV01AG-0081CDI8 uniquely combines analog VC tuning, quad-default frequency agility, and sub-0.5 ps jitter in a compact 10-lead ceramic package - making it optimal for carrier-class infrastructure where holdover resilience and field-programmable frequency alignment are mandatory.

Availability

8N3QV01AG-0081CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networks, enterprise switching, and test & measurement equipment requiring stable component supply, guaranteed RoHS 6 compliance, and full traceability from Renesas wafer lot to shipment.

Supply support for 8N3QV01AG-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, with deep expertise in high-performance clock generation for communications and industrial markets.

The 8N3QV01AG-0081CDI8 belongs to Renesas' FemtoClock® NG family - engineered specifically for carrier-grade timing applications demanding ultra-low jitter, programmable VCXO functionality, and robust operation across extended temperature ranges.

FAQ

What is the default output frequency configuration for 8N3QV01AG-0081CDI8?

The 8N3QV01AG-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 states. These values are stored in P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, and N₀–N₃ registers and can be overwritten via I²C.

Does 8N3QV01AG-0081CDI8 support both 2.5 V and 3.3 V supply operation?

Yes, 8N3QV01AG-0081CDI8 supports dual supply modes: VCC = 2.5 V ±5% or 3.3 V ±5%, as specified in Tables 5A and 5B of the datasheet. The device automatically adapts LVPECL output levels (VOH/VOL) and internal biasing to the applied VCC. No external configuration is needed - simply apply the desired rail to pin 8 (VCC) and connect VEE (pin 3) to ground.

How is the absolute pull range (APR) programmed on 8N3QV01AG-0081CDI8?

The APR of 8N3QV01AG-0081CDI8 is programmed via the 6-bit ADC_GAIN[5:0] register over I²C. Valid settings range from 0x01 (±12.5 ppm at 3.3 V) to 0x3F (±754.5 ppm at 3.3 V), with oscillator gain scaling linearly as 25 × ADC_GAIN ÷ VCC (ppm/V). This register directly controls the sensitivity of the VC pin to tuning voltage, enabling precise loop bandwidth design.

What is the recommended termination for the LVPECL outputs of 8N3QV01AG-0081CDI8?

For 3.3 V operation, terminate the Q/nQ differential pair with two 84 Ω resistors to 3.3 V and one 125 Ω resistor to ground (Figure 1A), or use AC-coupled 50 Ω termination to VCC − 2 V. For 2.5 V operation, use 50 Ω resistors to ground (Figure 2C). All traces must be length-matched, impedance-controlled at 50 Ω, and routed away from noisy digital signals to preserve 0.487 ps jitter performance.

Can the 8N3QV01AG-0081CDI8 be used without connecting the I²C interface?

Yes - the 8N3QV01AG-0081CDI8 operates fully functional using only its four factory-programmed default frequencies selected by FSEL0/FSEL1. SDATA and SCLK pins have internal pullups and may be left floating if I²C programming is not required. OE (pin 2) defaults high, enabling outputs at power-up; VC (pin 1) may be tied to VCC/2 for center-frequency operation if APR tuning is unused.

8N3QV01AG-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:: -

8N3QV01AG-0081CDI8 FAQ

1.How can I place an order for 8N3QV01AG-0081CDI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N3QV01AG-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 8N3QV01AG-0081CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3QV01AG-0081CDI8 is usually 5 days.

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8N3QV01AG-0081CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N3QV01AG-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 8N3QV01AG-0081CDI8?

For technical support, including 8N3QV01AG-0081CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3QV01AG-0081CDI8 requirements.

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All 8N3QV01AG-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 8N3QV01AG-0081CDI8 meets industry standards.

7.What is the process for return or replacement of 8N3QV01AG-0081CDI8?

All 8N3QV01AG-0081CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N3QV01AG-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 8N3QV01AG-0081CDI8 part is unused and in its original packaging.

Return procedure for 8N3QV01AG-0081CDI8:

1.Submit a request within 90 days.

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

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