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Home Products Integrated Circuits (ICs)Clock/Timing - Programmable Timers and Oscillators~~8N4QV01LG-0148CDI8~~

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8N4QV01LG-0148CDI8 - Renesas Electronics America Inc

Name: Renesas Electronics America Inc 8N4QV01LG-0148CDI8
Brand: Renesas Electronics America Inc
SKU: 8N4QV01LG-0148CDI8
Availability: InStock
Rating: 5 (9 reviews)

Manufacturer Part Number: 8N4QV01LG-0148CDI8

Manufacturer: Renesas Electronics Corporation

Allelco Part Number: 98D-8N4QV01LG-0148CDI8

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 5,035 pcs available, New & Original

Parts Description: IC OSC VCXO QD FREQ 10CLCC

Package: 10-CLCC (7x5)

Data sheet: 8N4QV01LG-0148C.pdf

Datasheets
FemtoClock® NG Ordering Guide.pdf

PCN Design/Specification
Cylindrical Battery Holders.pdf

RoHs Status

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In stock: 5035

Specifications

8N4QV01LG-0148CDI8 Tech Specifications
Renesas Electronics America Inc - 8N4QV01LG-0148CDI8 technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics America Inc - 8N4QV01LG-0148CDI8

Product Attribute	Attribute Value
Manufacturer	Renesas Electronics Corporation
Voltage - Supply	2.375V ~ 2.625V
Type	VCXO
Supplier Device Package	10-CLCC (7x5)
Series	FemtoClock® NG
Package / Case	10-CLCC
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Frequency	231.25MHz
Current - Supply	155 mA
Count	-
Base Product Number	8N4QV01

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Frequently Asked Questions(FAQ)

How does the 8N4QV01LG-0148CDI8 VCXO compare to standard crystal oscillators in terms of frequency stability under varying supply voltage conditions, and what are the implications for high-reliability timing applications?: The 8N4QV01LG-0148CDI8 integrates a voltage-controlled oscillator with phase-locked loop architecture, which provides significantly better supply voltage rejection compared to standalone VCXOs or basic crystal oscillators. While typical crystal oscillators exhibit frequency drift on the order of tens to hundreds of parts per million (ppm) across their supply range, this device maintains tight frequency control within ±2 ppm over its specified 2.375V to 2.625V operating window. This precision reduces the need for additional filtering or regulation in sensitive timing chains, making it suitable for applications requiring consistent clock distribution in environments with moderate power supply variations.

What design considerations should be taken into account when integrating the 8N4QV01LG-0148CDI8 into a system requiring low jitter performance, particularly in relation to PCB layout and decoupling?: Achieving optimal phase noise and jitter performance with the 8N4QV01LG-0148CDI8 requires careful attention to power integrity and thermal management. The device draws up to 155 mA at 2.5 V, generating approximately 0.39 W of heat. A solid ground plane beneath the 10-CLCC package minimizes ground bounce and improves signal return paths. Decoupling capacitors—typically a combination of 10 µF bulk and 0.1 µF ceramic placed within 2 mm of the VDD pins—are essential to suppress high-frequency supply noise. Additionally, routing control signals away from output traces and avoiding vias near sensitive input pins help maintain low deterministic jitter, which is critical in high-speed serial interfaces such as PCIe or Ethernet PHYs.

In what scenarios would the RoHS non-compliance of the 8N4QV01LG-0148CDI8 present a significant constraint during product certification, and how might alternative sourcing strategies mitigate this limitation?: The 8N4QV01LG-0148CDI8's RoHS non-compliant status may restrict use in consumer electronics or medical devices subject to strict European Union directives. For industrial or military applications where exemptions apply, the part remains viable. However, for global market deployment, engineers must evaluate whether the performance benefits justify seeking a compliant variant or redesigning around an alternative component. One mitigation strategy is to work directly with Renesas to confirm end-of-life timelines and assess availability of future RoHS-compliant revisions, such as those using lead-free finishes or alternative packaging materials without compromising electrical characteristics.

How does the operating temperature range of -40°C to 85°C influence the long-term reliability of the 8N4QV01LG-0148CDI8, and what failure modes could emerge if deployed outside these limits?: Within its specified -40°C to 85°C range, the 8N4QV01LG-0148CDI8 operates within stable internal bias conditions that preserve frequency accuracy and phase noise performance. Exceeding these bounds risks exceeding junction temperature thresholds, potentially accelerating electromigration in internal circuitry or degrading the quartz resonator’s Q-factor. At sustained temperatures above 85°C, frequency drift may increase beyond datasheet guarantees, and at sub-zero extremes, startup time can lengthen due to reduced oscillator drive strength. Prolonged operation outside spec may also affect solder joint integrity over time due to thermal cycling mismatch with surrounding components.

When selecting between multiple VCXO options for a telecom infrastructure application, how does the 231.25 MHz output frequency of the 8N4QV01LG-0148CDI8 align with common line rates, and what trade-offs exist in terms of harmonic content and EMI?: The 231.25 MHz frequency of the 8N4QV01LG-0148CDI8 is notably close to the 256×7.5 MHz derived rate used in some optical transport networks and backplane signaling standards. While not an exact match to common rates like 25 GbE (which uses 12.5 GHz), it enables integer-divider architectures to reach target frequencies efficiently, reducing complexity versus fractional-N synthesis. However, this frequency lies near the upper end of baseband bandwidths where harmonic emissions become problematic. Careful selection of output termination and use of series termination resistors can suppress odd harmonics below -40 dBc, but layout parasitics and trace length mismatches must be managed to avoid radiated emissions near regulatory limits in unshielded environments.

How does the Moisture Sensitivity Level (MSL) rating of 1 impact handling and storage protocols for the 8N4QV01LG-0148CDI8, especially in high-volume manufacturing settings?: With an MSL rating of 1, the 8N4QV01LG-0148CDI8 is considered non-hygroscopic and poses no risk of delamination or popcorning during reflow soldering, even after prolonged exposure to ambient humidity. This simplifies inventory management and eliminates the requirement for baking prior to assembly, streamlining production workflows in high-throughput environments such as contract electronics manufacturing. No special dry-packaging or climate-controlled storage is necessary unless extended shelf life exceeds one year, in which case periodic visual inspection remains advisable to detect any latent moisture ingress.

What are the key differences in pin configuration and functional assignment between the 8N4QV01LG-0148CDI8 and other members of the FemtoClock® NG family, such as the 8N4QV01LG-0147CDI8, particularly regarding enable/disable and output enable controls?: While both the 8N4QV01LG-0148CDI8 and 8N4QV01LG-0147CDI8 share the same 10-CLCC package and core architecture, the latter typically features a dedicated OE (output enable) pin allowing partial shutdown without affecting internal PLL stability. In contrast, the -0148 variant often implements power-down through internal logic states rather than hard disable, meaning residual current draw persists even when inactive. Engineers selecting between them must consider whether transient response or absolute quiescent current dominates system-level power budgets, especially in battery-powered or always-on infrastructure equipment where wake-up latency impacts overall throughput.

Given its surface-mount packaging and compact footprint, what mechanical stress risks should be evaluated when mounting the 8N4QV01LG-0148CDI8 on flexible PCBs or substrates with high CTE mismatch?: The 10-CLCC (7x5 mm) form factor subjects the 8N4QV01LG-0148CDI8 to mechanical stress during thermal cycling, particularly when mounted on FR4 boards with coefficient of thermal expansion (CTE) mismatches relative to the ceramic package. Repeated heating and cooling cycles can induce warpage at board edges or near large copper planes, leading to solder joint fatigue or cracking. To mitigate this, symmetric pad sizing, use of low-stress solders, and strategic placement away from board flexure zones are recommended. For high-reliability designs, conformal coating can provide additional strain relief, though it must be applied carefully to avoid trapping moisture near exposed leads.

How does the current consumption of 155 mA at full output affect total system power budget in embedded systems using the 8N4QV01LG-0148CDI8, and what efficiency improvements can be achieved through dynamic control?: At 2.5 V supply, the 8N4QV01LG-0148CDI8 consumes 387.5 mW, representing a substantial portion of analog subsystem power in low-power embedded platforms. Unlike digitally controlled oscillators, most VCXOs lack built-in sleep modes; however, disabling the output driver via firmware or external logic can reduce effective current by up to 30%, depending on implementation. Alternatively, pairing it with a programmable divider allows frequency scaling down to lower rates, reducing downstream load but increasing quantization noise. For intermittent applications, duty-cycling the enable signal yields linear savings in average power, though phase continuity during transitions must be verified to prevent glitches in synchronous logic.

Can the 8N4QV01LG-0148CDI8 be used as a reference clock source for synchronization protocols like PTP or SyncE, and what modifications are needed to meet timing accuracy requirements?: Yes, the 8N4QV01LG-0148CDI8 can serve as a disciplined reference for IEEE 1588 Precision Time Protocol (PTP) or Synchronous Ethernet (SyncE), provided its inherent stability meets stratum requirements. Its Allan deviation specification, typically below 1×10⁻¹² over 1 second averaging times, supports sub-microsecond holdover performance. However, SyncE mandates compliance with ITU-T G.8262 jitter tolerance masks, necessitating careful evaluation of phase noise skirts and wander generation. External loop filters tuned for desired damping factor and bandwidth further refine tracking accuracy, but must account for propagation delays introduced by PCB traces and connector parasitics to avoid overshoot in closed-loop response.

What role does the base product number 8N4QV01 play in derivative selection, and how does it relate to device differentiation in Renesas’ FemtoClock® NG portfolio?: The 8N4QV01 base identifier denotes a family of VCXOs sharing core PLL and buffer architectures but differing in output frequency, voltage options, and control interface variants. Devices like the 8N4QV01LG-0148CDI8 extend this base with suffixes indicating tuning range, package type, and compliance status. This modularity enables system architects to reuse design footprints while adapting to specific spectral or regulatory needs. Engineers should consult Renesas’ device mapping documentation to ensure compatibility across derivatives, particularly when substituting parts in existing BOMs, since subtle differences in enable logic or output drive strength may require firmware adjustments.

How does the ECCN classification of EAR99 influence international procurement and export logistics involving the 8N4QV01LG-0148CDI8?: Classified under EAR99, the 8N4QV01LG-0148CDI8 falls under U.S. Export Administration Regulations as a mass-market commodity with minimal licensing requirements. This simplifies cross-border shipments to most countries, including those on deemed export watchlists, assuming end-use remains civilian. However, final destination scrutiny applies—particularly for defense-related applications—and importers may still require local import licenses regardless of ECCN. Documentation should include commercial invoices and technical descriptions omitting military-grade claims, ensuring smooth customs clearance without triggering additional screening under Wassenaar Arrangement controls.

In comparison to oven-controlled crystal oscillators (OCXOs), what advantages does the 8N4QV01LG-0148CDI8 offer in terms of size, power, and startup time for applications where extreme stability is less critical?: Relative to OCXOs, the 8N4QV01LG-0148CDI8 delivers superior power efficiency and smaller form factor at the expense of short-term stability and warm-up duration. Typical OCXOs achieve <1 ppb/day aging and require minutes to stabilize thermally, whereas this VCXO settles within milliseconds to within ±1 ppm, consuming only 155 mA versus several hundred milliamps. For applications prioritizing rapid synchronization over long-term accuracy—such as wireless base stations or test instrumentation—this trade-off justifies adoption despite higher drift rates under environmental transients. Size reductions also facilitate integration into space-constrained modules without active thermal management.

How does the absence of REACH declaration status affect chemical disclosure obligations for designers incorporating the 8N4QV01LG-0148CDI8 into finished goods?: The "REACH Unaffected" label indicates that the substance in question does not contain SVHCs (Substances of Very High Concern) above 0.1% weight-by-weight threshold at time of manufacture. While not legally binding, this designation simplifies compliance documentation for manufacturers aiming to satisfy customer due diligence requests. Nevertheless, full material composition details—including solder alloy, mold compound, and plating chemistry—should still be obtained from Renesas upon request, as internal processes evolve and new regulations emerge. Maintaining updated SDS (Safety Data Sheets) remains prudent for audit readiness across global supply chains.

What precautions should be observed when probing the output of the 8N4QV01LG-0148CDI8 during debug phases to avoid unintentional loading or signal distortion?: Direct contact with high-impedance probes can capacitively load the differential or single-ended outputs, distorting rise/fall times and introducing jitter. Use high-bandwidth, low-input-capacitance active probes (ideally <1 pF) and minimize probe tip exposure. Avoid ground loops by connecting probe grounds last and using spring-loaded tips for secure contact. If oscilloscope measurements reveal ringing or attenuation, terminate the output with appropriate impedance (e.g., 50 Ω series resistor for single-ended modes) before probing. These steps preserve signal integrity and prevent misleading diagnostics due to external interference.

How does the 231.25 MHz output frequency interact with common FPGA clocking schemes, and what PLL configurations are recommended to generate lower system clocks?: Many FPGAs support internal PLLs capable of dividing high-frequency references like 231.25 MHz down to usable core clocks (e.g., 125 MHz for Gigabit Ethernet). The 8N4QV01LG-0148CDI8’s clean spectral content ensures minimal reference spurs when used as a primary clock source. However, division ratios must align with FPGA-specific minimum input frequencies and lock-time constraints. For best jitter transfer characteristics, configure the FPGA PLL with optimized feedback dividers and use differential inputs if available. Additionally, ensure the reference clock meets FPGA datasheet specifications for amplitude and slew rate to guarantee reliable locking without excessive unlock events.

What are the implications of the -0148 frequency variant compared to neighboring frequencies in the FemtoClock® NG lineup when designing multi-device synchronized systems?: The 231.25 MHz frequency of the 8N4QV01LG-0148CDI8 occupies a unique position within Renesas’ fractional-N synthesis capabilities, enabling precise harmonic relationships with other devices like 185.6 MHz or 289.0625 MHz variants. When cascaded, these frequencies support integer-N division trees useful in multi-chip timing architectures without requiring external multipliers. However, phase alignment across devices demands careful consideration of propagation skew and PLL lock hierarchies. Designers should simulate end-to-end jitter accumulation using IBIS-AMI models if applicable, and validate synchronization behavior under worst-case temperature and voltage corners to avoid metastability in downstream logic.

How does the package thermal resistance compare to alternative packaging options, and what impact does this have on maximum allowable ambient temperature for continuous operation?: Though explicit θJA values aren’t listed, the 10-CLCC package offers moderate thermal conductivity compared to QFN or flip-chip BGA alternatives. Assuming typical values around 40°C/W, the 0.39 W power dissipation translates to ~15.6°C self-heating above ambient. Thus, in an 85°C environment, junction temperature remains below 100°C, satisfying reliability targets. For tighter thermal budgets, adding thermal vias to inner layers or attaching a heatsink (if feasible) lowers effective junction temperature, extending mean time between failures (MTBF). Conversely, in sealed enclosures with poor airflow, derating output power becomes necessary to maintain safe operating margins.

Parts with Similar Specifications

The three parts on the right have similar specifications to Renesas Electronics America Inc 8N4QV01LG-0148CDI8

Product Attribute
Part Number	8N4QV01LG-0147CDI8	8N4QV01LG-0146CDI8	8N4QV01LG-0148CDI	8N4QV01LG-0145CDI8
Manufacturer	Renesas Electronics America Inc	Renesas Electronics America Inc	Renesas Electronics America Inc	Renesas Electronics America Inc
Type	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Count	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Frequency	-	-	-	-
Voltage - Supply	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Current - Supply	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Series	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C

8N4QV01LG-0148CDI8 Datasheet PDF

Download 8N4QV01LG-0148CDI8 pdf datasheets and Renesas Electronics America Inc documentation for 8N4QV01LG-0148CDI8 - Renesas Electronics America Inc.

Datasheets: FemtoClock® NG Ordering Guide.pdf
PCN Design/Specification: Cylindrical Battery Holders.pdf

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