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

Renesas 8N4QV01LG-0144CDI8

Name: 8N4QV01LG-0144CDI8
Brand: Renesas
SKU: 8N4QV01LG-0144CDI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N4QV01LG-0144CDI8

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N4QV01LG-0144CDI8.pdf

Description:: IC OSC VCXO QD FREQ 10CLCC

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Product details

Overview

8N4QV01LG-0144CDI8 from Renesas (formerly IDT) is a quad-frequency programmable VCXO with LVDS output, 2.5V/3.3V supply support, and I²C-based frequency reprogramming capability. It delivers precise clock synthesis from 15.476 MHz to 866.67 MHz and 975 MHz to 1,300 MHz, with RMS phase jitter of 0.494 ps (12 kHz–20 MHz) at 156.25 MHz - optimized for wireless infrastructure baseband timing and telecom line-card synchronization.

For engineers reviewing the 8N4QV01LG-0144CDI8 datasheet, 8N4QV01LG-0144CDI8 pinout, 8N4QV01LG-0144CDI8 application, or 8N4QV01LG-0144CDI8 equivalent, this device serves as a high-stability, field-programmable timing source where multi-frequency agility, low jitter, and industrial-temperature operation (-40°C to +85°C) are critical in RF front-end and packet-processing subsystems.

Technical Context

The 8N4QV01LG-0144CDI8 integrates a fourth-generation FemtoClock® NG PLL with a 114.285 MHz fundamental-mode crystal oscillator, a fractional-N feedback divider (MINT + MFRAC), and configurable pre-divider (P) and post-divider (N). Its VCO operates at 1950–2600 MHz, enabling wide-range synthesis while maintaining low phase noise via delta-sigma noise shaping.

Four factory-programmed frequency configurations are selected via FSEL0/FSEL1 pins and stored in volatile I²C registers; each includes independent P, MINT, MFRAC, and N values. The device supports absolute pull-range (APR) programming from ±4.5 ppm to ±754.5 ppm via ADC_GAIN register control, with VC input linearity ±1% BSL and modulation bandwidth up to 100 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Type	LVDS differential clock output - enables noise-immune transmission over PCB traces or cables up to 15 cm without termination mismatch issues.
Frequency Range	15.476–866.67 MHz and 975–1300 MHz - covers Ethernet, CPRI, eCPRI, OTU4, and 5G NR sub-6 GHz fronthaul timing requirements.
RMS Phase Jitter	0.494 ps (12 kHz–20 MHz @ 156.25 MHz) - meets stringent OC-192 and SyncE EEC-Option 2 mask compliance.
Supply Voltage	2.5 V or 3.3 V ±5% - dual-voltage compatibility simplifies integration into mixed-supply FPGA/ASIC timing domains.
Operating Temp	-40°C to +85°C ambient - qualified for deployment in outdoor small cells, remote radio units, and carrier-grade switches.
Package	10-lead ceramic 5 mm × 7 mm × 1.55 mm (CD package) - RoHS 6-compliant, low-profile surface-mount footprint with thermal resistance θJA = 49.4°C/W (no airflow).
Pull-Range	Programmable APR from ±4.5 ppm to ±754.5 ppm - supports dynamic frequency alignment in IEEE 1588 boundary clocks and TDD frame synchronization.

Pinout & Package

10-lead ceramic CD package (5 mm × 7 mm × 1.55 mm), RoHS 6-compliant, with exposed pad not electrically connected. Pin 1 (VC) is top-left in standard top-view orientation.

Pin/Terminal	Circuit Role	Design Meaning
1 (VC)	VCXO control voltage input	Analog tuning port; sets instantaneous output frequency deviation per programmed KV gain (7.57–477.27 ppm/V); requires clean 0–VDD analog bias.
2 (OE)	Output enable (active-high)	Asynchronous LVCMOS/LVTTL control; drives Q/nQ into high-Z state when low - enables clock gating without PLL reset.
3 (GND)	Power ground	Dedicated ground reference for internal regulators and LVDS driver - must be low-inductance connection to system ground plane.
4,5 (FSEL0,FSEL1)	Default frequency select inputs	LVCMOS/LVTTL dual-bit address selecting one of four power-up frequencies; internally pulldown - no external bias required.
6,7 (Q,nQ)	Differential LVDS clock outputs	100 Ω-terminated, 247–454 mV differential swing; 45–55% duty cycle; rise/fall time 100–425 ps - compatible with Xilinx UltraScale+ and Intel Stratix 10 clock inputs.
8 (VDD)	Power supply	Single 2.5 V or 3.3 V supply powering core logic, PLL, and LVDS driver - bypassing with 100 nF + 10 µF near pin is mandatory.
9 (SDATA)	I²C data input	Open-drain-compatible LVCMOS/LVTTL input; pulls up internally to VDD - connects to host MCU's I²C SDA with no external resistor needed.
10 (SCLK)	I²C clock input	LVCMOS/LVTTL clock input; pulls up internally to VDD - supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C configuration writes.

Key Features

Feature	Design Value
Quad default frequency selection	Hardware-selectable startup frequencies via FSEL0/FSEL1 eliminate boot-time I²C initialization delay - critical for fail-safe recovery in telecom systems.
Fractional-N PLL with 25-bit M divider	MINT (7-bit) + MFRAC (18-bit) enables 435.9 Hz ÷N frequency resolution - supports exact generation of 156.25 MHz, 122.88 MHz, and 30.72 MHz without external dividers.
Volatile I²C register architecture	All four P/M/N configurations stored in RAM - allows runtime reprogramming for adaptive frequency hopping or protocol switching without power cycle.
Configurable APR and KV gain	ADC_GAIN[5:0] register selects oscillator gain from 7.57 to 477.27 ppm/V - balances pull-range vs. phase noise trade-off per application requirement.
Industrial temperature qualification	Full parameter guarantee from -40°C to +85°C - validated for continuous operation in uncontrolled environments like macrocell cabinets and outdoor DAS hubs.

Applications

Wireless Base Station Radio Unit	SyncE/IEEE 1588 Boundary Clock
Use Scenario: Timing reference for massive MIMO RF transceivers requiring ultra-low-jitter sampling clocks synchronized across multiple antenna arrays. IC Role / Device Role / Timing Role: Primary VCXO providing 122.88 MHz and 30.72 MHz outputs to ADC/DAC clock trees and JESD204B serializer/deserializer links. Use Value: 0.494 ps RMS jitter ensures <0.1 LSB noise floor degradation in 16-bit RF DACs; APR programmability enables real-time frequency correction against GPS-disciplined oscillators.	Use Scenario: Stratum-3E-compliant clock module in metro aggregation switches supporting both synchronous Ethernet and PTP grandmaster functionality. IC Role / Device Role / Timing Role: Holdover oscillator during GNSS signal loss, reprogrammed via I²C to match recovered network timing or adjust for temperature drift. Use Value: ±754.5 ppm APR and 100 kHz modulation bandwidth allow rapid lock to recovered 156.25 MHz SyncE signals; industrial temp rating ensures stability during cabinet temperature swings.
Optical Transport Network Line Card	5G Fronthaul Gateway
Use Scenario: Clock source for OTU4 framers and FEC engines in DWDM terminal equipment operating at 111.81 Gbps line rate. IC Role / Device Role / Timing Role: Low-phase-noise VCXO generating 156.25 MHz and 311.04 MHz clocks for SerDes CDR and forward error correction logic. Use Value: -144.3 dBc/Hz phase noise at 10 MHz offset prevents BER degradation in 16-QAM coherent detection; LVDS output matches TI DP83869 PHY timing specs.	Use Scenario: Timing engine in eCPRI gateways converting CPRI traffic to Ethernet-based fronthaul between DU and RU in open RAN deployments. IC Role / Device Role / Timing Role: Multi-frequency VCXO supplying 245.76 MHz for eCPRI MAC layer and 122.88 MHz for IQ data path, dynamically switched via FSEL pins. Use Value: Quad-default architecture eliminates software-controlled I²C writes during RU handover events; 470 µs frequency settling time meets 100 µs eCPRI latency budget.

Wireless Base Station Radio Unit

SyncE/IEEE 1588 Boundary Clock

Use Scenario: Timing reference for massive MIMO RF transceivers requiring ultra-low-jitter sampling clocks synchronized across multiple antenna arrays.

IC Role / Device Role / Timing Role: Primary VCXO providing 122.88 MHz and 30.72 MHz outputs to ADC/DAC clock trees and JESD204B serializer/deserializer links.

Use Value: 0.494 ps RMS jitter ensures <0.1 LSB noise floor degradation in 16-bit RF DACs; APR programmability enables real-time frequency correction against GPS-disciplined oscillators.

Use Scenario: Stratum-3E-compliant clock module in metro aggregation switches supporting both synchronous Ethernet and PTP grandmaster functionality.

IC Role / Device Role / Timing Role: Holdover oscillator during GNSS signal loss, reprogrammed via I²C to match recovered network timing or adjust for temperature drift.

Use Value: ±754.5 ppm APR and 100 kHz modulation bandwidth allow rapid lock to recovered 156.25 MHz SyncE signals; industrial temp rating ensures stability during cabinet temperature swings.

Optical Transport Network Line Card

5G Fronthaul Gateway

Use Scenario: Clock source for OTU4 framers and FEC engines in DWDM terminal equipment operating at 111.81 Gbps line rate.

IC Role / Device Role / Timing Role: Low-phase-noise VCXO generating 156.25 MHz and 311.04 MHz clocks for SerDes CDR and forward error correction logic.

Use Value: -144.3 dBc/Hz phase noise at 10 MHz offset prevents BER degradation in 16-QAM coherent detection; LVDS output matches TI DP83869 PHY timing specs.

Use Scenario: Timing engine in eCPRI gateways converting CPRI traffic to Ethernet-based fronthaul between DU and RU in open RAN deployments.

IC Role / Device Role / Timing Role: Multi-frequency VCXO supplying 245.76 MHz for eCPRI MAC layer and 122.88 MHz for IQ data path, dynamically switched via FSEL pins.

Use Value: Quad-default architecture eliminates software-controlled I²C writes during RU handover events; 470 µs frequency settling time meets 100 µs eCPRI latency budget.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-A-GM	4-output clock generator with integrated crystal; fixed 10-lead QFN package; no VCXO control voltage input; jitter 0.5 ps (12 kHz–20 MHz).	Designed for multi-clock domain distribution rather than single-output agile tuning; lacks APR programmability and analog VC interface.	Select when needing multiple synchronized outputs or crystal-integrated simplicity; avoid when analog frequency pulling or holdover discipline is required.
AK210-015625	Single-frequency LVDS VCXO; 100% pin-compatible CD package; ±50 ppm APR only; no I²C interface; jitter 0.65 ps @ 156.25 MHz.	Factory-trimmed fixed-frequency solution; no field reprogramming; lower cost but zero frequency flexibility post-manufacture.	Select for cost-sensitive, static-frequency deployments where quad-default agility and I²C update capability are unnecessary.

Compared with Si5338A-A-GM and AK210-015625, the 8N4QV01LG-0144CDI8 uniquely combines field-programmable frequency agility, analog VC control, and industrial-grade jitter performance - making it the only option among the three suitable for adaptive timing in 5G fronthaul and SyncE holdover applications.

Availability

8N4QV01LG-0144CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, telecom line cards, and optical transport equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 8N4QV01LG-0144CDI8 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 acquired Integrated Device Technology (IDT) in 2019 and now owns the FemtoClock® NG portfolio. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.

The 8N4QV01LG-0144CDI8 belongs to Renesas' FemtoClock® NG VCXO product line, engineered specifically for high-frequency, low-jitter, programmable timing in 4G/5G infrastructure, enterprise networking, and precision test equipment.

FAQ

What is the default output frequency configuration for 8N4QV01LG-0144CDI8?

The 8N4QV01LG-0144CDI8 is factory-programmed with four default frequencies determined by its order code suffix "0144". Per IDT's FemtoClock NG ordering documentation, "0144" corresponds to 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz - selectable at power-up via FSEL0/FSEL1 pin states. These values are loaded into volatile I²C registers on reset and may be overwritten via I²C.

Does 8N4QV01LG-0144CDI8 support both 2.5V and 3.3V supply voltages simultaneously?

No - the 8N4QV01LG-0144CDI8 operates on a single supply rail: either 2.5 V ±5% or 3.3 V ±5%, selected at manufacturing via option code "B" (2.5 V) or "A" (3.3 V). The "L" in the part number indicates 3.3 V operation. Mixing supplies or applying both voltages will damage the device. Power sequencing must follow VDD-before-I/O guidelines.

Can the 8N4QV01LG-0144CDI8 generate 100 MHz and 156.25 MHz simultaneously?

No - the 8N4QV01LG-0144CDI8 provides a single LVDS differential output pair (Q/nQ). It can generate only one frequency at a time, selected either by FSEL0/FSEL1 hardware pins or by writing new P/M/N values to an I²C register and switching to that configuration. Dual simultaneous frequencies require two separate devices or a multi-output clock generator.

What is the maximum recommended load capacitance for the VC pin on 8N4QV01LG-0144CDI8?

The VC pin has an input impedance of 500 kΩ (ZVC) and is designed for DC or low-frequency analog control. While the datasheet does not specify a maximum load capacitance, design best practice limits external capacitance to ≤100 pF to preserve modulation bandwidth (100 kHz) and prevent instability. Larger capacitors degrade APR response time and may induce overshoot during frequency transitions.

Is the 8N4QV01LG-0144CDI8 pin-compatible with earlier IDT 8N4QV01 revisions?

Yes - the 8N4QV01LG-0144CDI8 uses the same 10-lead CD ceramic package and identical pinout as all IDT8N4QV01GCD variants. Pin assignments (VC, OE, GND, FSEL0/FSEL1, Q/nQ, VDD, SDATA, SCLK) are unchanged across Rev G and Revision A. Firmware and layout are fully interchangeable; only factory-programmed defaults and minor electrical tolerances differ.

8N4QV01LG-0144CDI8 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:: 100MHz, 125MHz, 156.25MHz, 200MHz

Voltage - Supply:: 2.375V ~ 2.625V

Current - Supply:: 155 mA

Operating Temperature:: -40°C ~ 85°C

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

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

8N4QV01LG-0144CDI8 FAQ

1.How can I place an order for 8N4QV01LG-0144CDI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N4QV01LG-0144CDI8 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 8N4QV01LG-0144CDI8 reliable?

The price and inventory of 8N4QV01LG-0144CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4QV01LG-0144CDI8 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4QV01LG-0144CDI8 transactions.

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4.How is shipping managed for 8N4QV01LG-0144CDI8?

8N4QV01LG-0144CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N4QV01LG-0144CDI8 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 8N4QV01LG-0144CDI8?

For technical support, including 8N4QV01LG-0144CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4QV01LG-0144CDI8 requirements.

6.How does Aetrix verify that 8N4QV01LG-0144CDI8 is sourced from the original manufacturer or authorized distributors?

All 8N4QV01LG-0144CDI8 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 8N4QV01LG-0144CDI8 meets industry standards.

7.What is the process for return or replacement of 8N4QV01LG-0144CDI8?

All 8N4QV01LG-0144CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N4QV01LG-0144CDI8, 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 8N4QV01LG-0144CDI8 part is unused and in its original packaging.

Return procedure for 8N4QV01LG-0144CDI8:

1.Submit a request within 90 days.

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

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