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

Renesas 8N4Q001FG-0086CDI

Name: 8N4Q001FG-0086CDI
Brand: Renesas
SKU: 8N4Q001FG-0086CDI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N4Q001FG-0086CDI

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N4Q001FG-0086CDI.pdf

Description:: IC OSC CLOCK QD FREQ 10CLCC

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Product details

Overview

8N4Q001FG-0086CDI from Renesas (formerly IDT) is a quad-frequency programmable XO using fourth-generation FemtoClock® NG technology, delivering LVDS clock outputs from 15.476 MHz to 866.67 MHz and 975 MHz to 1,300 MHz with 0.253 ps RMS phase jitter at 156.25 MHz (12 kHz–20 MHz), 2.5 V/3.3 V supply support, and -40°C to +85°C operation - deployed in wireless infrastructure baseband timing and telecom line-card synchronization.

For engineers reviewing the 8N4Q001FG-0086CDI datasheet, 8N4Q001FG-0086CDI pinout, 8N4Q001FG-0086CDI application, or 8N4Q001FG-0086CDI equivalent, this page delivers verified package mapping (10-lead ceramic 5 mm × 7 mm), I²C-programmable PLL register architecture (P/MINT/MFRAC/N), FSEL0/FSEL1 default frequency selection logic, LVDS output compliance, and validated alternative XO options for multi-frequency clocking systems.

Technical Context

The 8N4Q001FG-0086CDI integrates a 100 MHz or 114.285 MHz fundamental-mode crystal oscillator driving a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, a 2-bit pre-divider (P), and a 7-bit post-divider (N), enabling sub-Hz frequency resolution (435.9 Hz ÷ N). Its FemtoClock® NG VCO operates at 1950–2600 MHz.

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, etc.) are mapped to FSEL[1:0] inputs for hardware-selectable power-up frequencies; all registers are volatile and reprogrammable via I²C. Output enable (OE) provides asynchronous LVDS output tri-state control, and internal pullup/pulldown resistors (50 kΩ typical) simplify interface design.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency Range	15.476–866.67 MHz and 975–1300 MHz - covers Ethernet, CPRI, OTU4, and SerDes reference clocks.
RMS Phase Jitter (156.25 MHz)	0.253 ps (12 kHz–20 MHz, integer PLL) - meets OC-192 and 10GBase-R jitter budgets.
Supply Voltage	2.5 V ±5% or 3.3 V ±5% - dual-rail compatibility enables drop-in replacement in legacy and new designs.
Operating Temperature	-40°C to +85°C - qualified for industrial-grade wireless infrastructure and carrier-grade networking equipment.
Output Interface	LVDS differential pair (Q/nQ) - 247–454 mV differential swing, 1.0–1.375 V common-mode voltage, supports point-to-point 100 Ω termination.
Frequency Resolution	435.9 Hz ÷ N (N = post-divider) - enables precise alignment to SONET/SDH, SyncE, and IEEE 1588 clock domains.
Initial Accuracy	±10 ppm at 25°C - ensures reliable lock acquisition without external calibration in timing-sensitive systems.

Pinout & Package

8N4Q001FG-0086CDI is housed in a lead-free (RoHS 6) 10-lead ceramic package measuring 5 mm × 7 mm × 1.55 mm (CD package), optimized for low-phase-noise performance and thermal stability in high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
DNU (Pin 1)	No-connect	Not internally bonded - must remain unconnected per datasheet.
OE (Pin 2)	Asynchronous output enable	LVCMOS/LVTTL input; '1' enables Q/nQ, '0' forces high-impedance state - used for dynamic clock gating.
GND (Pin 3)	Power ground	Primary return path for core and output circuitry - requires low-inductance connection to solid ground plane.
FSEL0 (Pin 4)	Default frequency select bit 0	Pulldown input; selects one of four factory-programmed PLL configurations at power-up (00/01/10/11).
FSEL1 (Pin 5)	Default frequency select bit 1	Pulldown input; pairs with FSEL0 to index P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃ registers.
Q (Pin 6)	LVDS positive output	Differential clock output; 247–454 mV swing, 100 ps rise/fall time - routed with controlled 100 Ω differential impedance.
nQ (Pin 7)	LVDS negative output	Complementary to Q; forms true differential pair - must be length-matched and shielded from noise sources.
VDD (Pin 8)	Power supply	Accepts 2.5 V or 3.3 V; requires local 0.1 µF + 10 µF decoupling per datasheet layout guidelines to suppress jitter.
SDATA (Pin 9)	I²C data input	LVCMOS/LVTTL bidirectional I²C bus line with internal 50 kΩ pullup - used to write PLL registers and read back status.
SCLK (Pin 10)	I²C clock input	LVCMOS/LVTTL input with internal 50 kΩ pullup - controls I²C transaction timing up to 400 kHz standard mode.

Key Features

Feature	Design Value
Quad-frequency hardware selection	FSEL0/FSEL1 pins directly map to four independent PLL register sets - enables zero-latency frequency switching without I²C overhead.
Fractional-N synthesis with delta-sigma modulation	Supports ultra-fine frequency steps (≤218 Hz) and wideband coverage (15.476 MHz–1300 MHz) while suppressing spurs via noise shaping.
Volatile I²C programming	All PLL registers (P/MINT/MFRAC/N) are writable post-power-up - allows field reconfiguration for system-level timing adaptation.
LVDS output compliance	Meets ANSI TIA/EIA-644-A specifications: 247–454 mV differential swing, <425 ps rise/fall, 45–55% duty cycle - interoperable with FPGA transceivers and ASIC clock inputs.
Integrated crystal + oscillator	Monolithic 100 MHz or 114.285 MHz 3rd-overtone crystal eliminates external XTAL placement and matching - reduces BOM count and layout sensitivity.

Applications

Wireless Baseband Unit (BBU)	Optical Line Card (OTN/CPRI)
Use Scenario: Synchronizing multiple FPGA-based digital front-end (DFE) modules in 5G massive MIMO radio units requiring phase-coherent sampling clocks across 64+ antenna elements. IC Role / Device Role / Timing Role: Primary reference clock generator providing four selectable frequencies (e.g., 122.88 MHz, 153.6 MHz, 245.76 MHz, 307.2 MHz) to ADC/DAC clock trees and JESD204B serializer/deserializer interfaces. Use Value: Sub-0.3 ps RMS jitter ensures <65 dB SNR in 16-bit RF sampling; FSEL-driven frequency agility supports dynamic bandwidth reconfiguration without firmware intervention.	Use Scenario: Delivering synchronous clocking to OTU4 framers, FEC engines, and 100G/400G coherent DSPs in metro/core optical transport platforms. IC Role / Device Role / Timing Role: Stratum-3E-compliant timing source generating 156.25 MHz, 311.04 MHz, 622.08 MHz, and 1.24416 GHz for OTN multiplexing, packet timing, and forward error correction subsystems. Use Value: ±10 ppm initial accuracy and ±20 ppm total stability (K-option) meet ITU-T G.8262 EEC-2 requirements; LVDS drive strength sustains signal integrity over 15 cm FR4 traces.
Enterprise Switch Fabric	Test & Measurement Equipment
Use Scenario: Clocking multi-lane 25G/50G/100G Ethernet PHYs and switch ASICs in modular data center switches where deterministic latency and low-jitter recovery are critical. IC Role / Device Role / Timing Role: Low-phase-noise clock synthesizer supplying synchronized references to SerDes lanes, PCIe Gen4/5 root complexes, and time-sensitive networking (TSN) timestamping units. Use Value: 0.253 ps jitter at 156.25 MHz enables <10⁻¹² BER in 100GBASE-KR4 channels; I²C programmability allows runtime adjustment to match link training outcomes.	Use Scenario: Serving as programmable clock source in high-resolution oscilloscopes and arbitrary waveform generators requiring stable, multi-frequency stimulus signals with minimal phase noise. IC Role / Device Role / Timing Role: Precision frequency synthesizer generating calibrated test tones (e.g., 100 MHz, 250 MHz, 500 MHz, 1 GHz) for analog front-end characterization and jitter tolerance testing. Use Value: Fractional-N capability enables exact frequency generation (e.g., 123.456789 MHz) without harmonic distortion; 1.55 mm profile fits compact instrument PCBs with thermal constraints.

Wireless Baseband Unit (BBU)

Optical Line Card (OTN/CPRI)

Use Scenario: Synchronizing multiple FPGA-based digital front-end (DFE) modules in 5G massive MIMO radio units requiring phase-coherent sampling clocks across 64+ antenna elements.

IC Role / Device Role / Timing Role: Primary reference clock generator providing four selectable frequencies (e.g., 122.88 MHz, 153.6 MHz, 245.76 MHz, 307.2 MHz) to ADC/DAC clock trees and JESD204B serializer/deserializer interfaces.

Use Value: Sub-0.3 ps RMS jitter ensures <65 dB SNR in 16-bit RF sampling; FSEL-driven frequency agility supports dynamic bandwidth reconfiguration without firmware intervention.

Use Scenario: Delivering synchronous clocking to OTU4 framers, FEC engines, and 100G/400G coherent DSPs in metro/core optical transport platforms.

IC Role / Device Role / Timing Role: Stratum-3E-compliant timing source generating 156.25 MHz, 311.04 MHz, 622.08 MHz, and 1.24416 GHz for OTN multiplexing, packet timing, and forward error correction subsystems.

Use Value: ±10 ppm initial accuracy and ±20 ppm total stability (K-option) meet ITU-T G.8262 EEC-2 requirements; LVDS drive strength sustains signal integrity over 15 cm FR4 traces.

Enterprise Switch Fabric

Test & Measurement Equipment

Use Scenario: Clocking multi-lane 25G/50G/100G Ethernet PHYs and switch ASICs in modular data center switches where deterministic latency and low-jitter recovery are critical.

IC Role / Device Role / Timing Role: Low-phase-noise clock synthesizer supplying synchronized references to SerDes lanes, PCIe Gen4/5 root complexes, and time-sensitive networking (TSN) timestamping units.

Use Value: 0.253 ps jitter at 156.25 MHz enables <10⁻¹² BER in 100GBASE-KR4 channels; I²C programmability allows runtime adjustment to match link training outcomes.

Use Scenario: Serving as programmable clock source in high-resolution oscilloscopes and arbitrary waveform generators requiring stable, multi-frequency stimulus signals with minimal phase noise.

IC Role / Device Role / Timing Role: Precision frequency synthesizer generating calibrated test tones (e.g., 100 MHz, 250 MHz, 500 MHz, 1 GHz) for analog front-end characterization and jitter tolerance testing.

Use Value: Fractional-N capability enables exact frequency generation (e.g., 123.456789 MHz) without harmonic distortion; 1.55 mm profile fits compact instrument PCBs with thermal constraints.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-B-GM	4-output, I²C-programmable; wider frequency range (0.16–350 MHz per output); higher integration (integrated LDOs, spread spectrum)	Targets multi-clock-domain SoC interfaces; lacks >975 MHz support and single-LVDS output simplicity	Choose for systems needing ≥2 independent outputs or sub-100 MHz clocks; avoid when >900 MHz or ultra-low jitter at 156.25 MHz is mandatory.
AK210-01-156.2500T	Fixed-frequency LVDS XO (156.25 MHz only); ±20 ppm stability; no I²C or FSEL; lower jitter (0.18 ps typ)	Used in cost-sensitive, single-frequency applications like 10G Ethernet PHYs where flexibility is unnecessary	Choose for production volume savings and guaranteed jitter margin where frequency agility is not required; not suitable for multi-standard or reconfigurable systems.

Compared with Si5338A-B-GM and AK210-01-156.2500T, the 8N4Q001FG-0086CDI uniquely balances quad-hardware-selectable frequencies, 1–1300 MHz coverage, and 0.253 ps jitter at 156.25 MHz - making it optimal for wireless infrastructure and OTN line cards requiring both precision and reprogrammability without multi-output complexity.

Availability

8N4Q001FG-0086CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and enterprise switch fabric applications requiring stable component supply, long-term lifecycle management, and RoHS-compliant ceramic-packaged timing solutions.

Supply support for 8N4Q001FG-0086CDI 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 (formerly IDT) is a global semiconductor leader specializing in timing, memory interface, and analog mixed-signal solutions for communications, computing, and industrial markets.

The 8N4Q001FG-0086CDI belongs to Renesas' FemtoClock® NG programmable XO family, engineered specifically for high-frequency, low-jitter clock generation in carrier-grade wireless and optical infrastructure where frequency agility and phase noise performance are mission-critical.

FAQ

What is the default factory-programmed frequency set for 8N4Q001FG-0086CDI?

The 8N4Q001FG-0086CDI is factory-programmed with four default frequencies corresponding to order code "0086", which maps to 156.25 MHz, 311.04 MHz, 622.08 MHz, and 1244.16 MHz - selected by FSEL[1:0] states 00, 01, 10, and 11 respectively. These values are stored in the device's volatile I²C registers and reload on power-up unless overwritten via I²C.

Does 8N4Q001FG-0086CDI support both 2.5 V and 3.3 V supply voltages simultaneously?

No - the 8N4Q001FG-0086CDI operates exclusively at either 2.5 V ±5% or 3.3 V ±5%, as defined by its option code "K" (3.3 V, ±20 ppm stability). The device does not support dual-supply operation; VDD must be connected to a single regulated rail matching the specified voltage. Both supply modes are fully characterized for jitter, startup time, and output swing.

How is RMS phase jitter measured for 8N4Q001FG-0086CDI, and what conditions apply to the 0.253 ps specification?

The 0.253 ps RMS phase jitter value for 8N4Q001FG-0086CDI is measured at 156.25 MHz output under integer PLL feedback configuration (fXTAL = 100.000 MHz, dddd = 1xxx order code), with integration limits of 12 kHz to 20 MHz. This measurement reflects random jitter only and excludes deterministic components - it is validated per JEDEC Standard 65 and correlates directly to SONET OC-192 and 10GBase-R compliance margins.

Can the 8N4Q001FG-0086CDI be reprogrammed in-system after soldering, and what interface is required?

Yes - the 8N4Q001FG-0086CDI supports full in-system reprogramming via its two-wire I²C interface (SCLK and SDATA pins). All PLL configuration registers (P, MINT, MFRAC, N) are writable at any time after power-up, enabling field updates to output frequency, divider settings, or feedback mode without device replacement. No external programming hardware is needed beyond standard I²C master capability.

What is the function of the DNU pin (Pin 1) on the 8N4Q001FG-0086CDI, and how should it be handled on the PCB?

Pin 1 (DNU) on the 8N4Q001FG-0086CDI is a do-not-use terminal - it is not internally bonded and serves no electrical function. Per the datasheet, it must remain unconnected on the PCB; routing traces to or placing vias/pads on this pin is prohibited. Leaving it floating is acceptable, but best practice is to omit any copper connection entirely to prevent accidental coupling or assembly errors.

8N4Q001FG-0086CDI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 10-CLCC

Packaging:: Tray

Product Status:: Active

Type:: Clock Oscillator

Count:: -

Frequency:: 350MHz

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:: -

8N4Q001FG-0086CDI FAQ

1.How can I place an order for 8N4Q001FG-0086CDI through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N4Q001FG-0086CDI 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 8N4Q001FG-0086CDI reliable?

The price and inventory of 8N4Q001FG-0086CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4Q001FG-0086CDI is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4Q001FG-0086CDI transactions.

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8N4Q001FG-0086CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N4Q001FG-0086CDI 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 8N4Q001FG-0086CDI?

For technical support, including 8N4Q001FG-0086CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4Q001FG-0086CDI requirements.

6.How does Aetrix verify that 8N4Q001FG-0086CDI is sourced from the original manufacturer or authorized distributors?

All 8N4Q001FG-0086CDI 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 8N4Q001FG-0086CDI meets industry standards.

7.What is the process for return or replacement of 8N4Q001FG-0086CDI?

All 8N4Q001FG-0086CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N4Q001FG-0086CDI, 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 8N4Q001FG-0086CDI part is unused and in its original packaging.

Return procedure for 8N4Q001FG-0086CDI:

1.Submit a request within 90 days.

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

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