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Renesas 8N4QV01LG-0144CDI
- Part No.:
- 8N4QV01LG-0144CDI
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 10-CLCC
- Datasheet:
-
8N4QV01LG-0144CDI.pdf
- Description:
- IC OSC VCXO QD FREQ 10CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,903
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Product details
Overview
8N4QV01LG-0144CDI from Renesas (formerly IDT) is a quad-frequency programmable VCXO using fourth-generation FemtoClock® NG technology, delivering LVDS differential output at 15.476–866.67 MHz or 975–1300 MHz with ±4.5 ppm to ±754.5 ppm absolute pull range, RMS phase jitter of 0.494 ps (12 kHz–20 MHz), and operation from -40°C to +85°C. It serves as a high-stability, software-reconfigurable clock source in wireless infrastructure baseband units.
For engineers reviewing the 8N4QV01LG-0144CDI datasheet, 8N4QV01LG-0144CDI pinout, 8N4QV01LG-0144CDI application, or 8N4QV01LG-0144CDI equivalent, this device supports I²C-based frequency reprogramming, four factory-default power-up frequencies selected via FSEL0/FSEL1, and precise APR tuning - critical for 5G fronthaul synchronization, packet timing recovery, and multi-standard radio coexistence.
Technical Context
The 8N4QV01LG-0144CDI integrates a 114.285 MHz third-overtone crystal oscillator, a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, and a 1950–2600 MHz VCO. Its architecture enables sub-Hz frequency resolution (435.9 Hz ÷ N) and supports four independent register sets (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) mapped to FSEL[1:0] states.
It features an internal ADC-controlled VCXO gain adjustment (ADC_GAIN[5:0], 7.57–477.27 ppm/V), LVCMOS/LVTTL-compatible control inputs with internal 50 kΩ pullups/pulldowns, and a single 2.5 V or 3.3 V LVDS output pair (Q/nQ) with 247–454 mV differential swing and 45–55% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 15.476–866.67 MHz or 975–1300 MHz - covers Ethernet, CPRI, eCPRI, and DOCSIS PHY clocking requirements |
| Absolute Pull Range (APR) | ±4.5 ppm to ±754.5 ppm - configurable via I²C for loop bandwidth and stability trade-offs in PLL applications |
| RMS Phase Jitter (156.25 MHz) | 0.494 ps (12 kHz–20 MHz integration) - meets stringent OC-192/SONET and 10G/25G Ethernet jitter budgets |
| Supply Voltage | 2.5 V or 3.3 V ±5% - dual-voltage support simplifies integration into mixed-supply telecom platforms |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade wireless infrastructure deployment |
| Package | 10-lead ceramic 5 mm × 7 mm × 1.55 mm (CD) - RoHS 6-compliant, low-profile surface-mount footprint |
| I²C Interface | Standard-mode (100 kHz) serial programming - enables dynamic frequency switching without hardware changes |
Pinout & Package
8N4QV01LG-0144CDI is housed in a lead-free (RoHS 6) 10-lead ceramic CD package measuring 5 mm × 7 mm × 1.55 mm, optimized for thermal performance (θJA = 49.4°C/W at 0 m/s airflow) and high-frequency signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VC | VCXO Control Voltage Input | Analog tuning input; voltage-to-frequency gain set by ADC_GAIN[5:0] register (7.57–477.27 ppm/V) |
| 2 OE | Output Enable | LVCMOS/LVTTL active-high control; places Q/nQ outputs in high-impedance state when low |
| 3 GND | Power Ground | Reference return for VDD, VC, and digital control signals; requires low-inductance PCB connection |
| 4 FSEL0 | Frequency Select Bit 0 | LVCMOS/LVTTL input with internal pulldown; selects one of four default PLL configurations at power-up |
| 5 FSEL1 | Frequency Select Bit 1 | LVCMOS/LVTTL input with internal pulldown; used with FSEL0 to index P/M/N register sets 0–3 |
| 6 Q | Differential Clock Output (+) | LVDS output; 247–454 mV differential swing, 45–55% duty cycle, 100–425 ps rise/fall time |
| 7 nQ | Differential Clock Output (−) | LVDS complementary output; must be terminated differentially (90–132 Ω) at receiver |
| 8 VDD | Power Supply | 2.5 V or 3.3 V supply; decoupling required per AC characteristics (160 mA max current at 3.3 V) |
| 9 SDATA | I²C Data Input | LVCMOS/LVTTL bidirectional data line with internal 50 kΩ pullup; supports volatile register writes |
| 10 SCLK | I²C Clock Input | LVCMOS/LVTTL clock input with internal 50 kΩ pullup; synchronizes I²C register access |
Key Features
| Feature | Design Value |
|---|---|
| Quad-frequency default selection | FSEL0/FSEL1 pins select one of four pre-programmed P/M/N configurations at power-up - enables boot-time clock flexibility without I²C initialization |
| Fractional-N PLL with delta-sigma modulation | Supports 435.9 Hz ÷ N frequency step size and low-phase-noise synthesis - essential for narrow-channel RF sampling clocks |
| Volatile I²C programming interface | Allows runtime reconfiguration of output frequency, APR, and PLL registers - supports multi-standard base station re-tuning |
| LVDS differential output | Guaranteed 247–454 mV differential swing and <0.5 ps RMS jitter at 156.25 MHz - ensures robust EMI immunity and signal integrity over PCB traces |
| Extended temperature operation | -40°C to +85°C ambient range with full specification compliance - validated for outdoor small cell and macro base station environments |
Applications
| 5G NR Baseband Timing | CPRI/eCPRI Fronthaul Clocking |
|---|---|
Use Scenario: Synchronizing distributed unit (DU) and radio unit (RU) in open RAN architectures with strict ±50 ppb phase alignment. IC Role / Device Role / Timing Role: Primary reference VCXO providing reprogrammable, low-jitter clock to FPGA-based fronthaul transceivers and SerDes PHYs. Use Value: I²C reprogrammability allows dynamic frequency adaptation across TDD/FDD bands; ±754.5 ppm APR supports wide-loop PLL designs for holdover resilience. |
Use Scenario: Delivering deterministic, low-latency clock distribution across fiber-connected remote radio heads operating at 2.4576 GHz or 3.072 GHz sampling rates. IC Role / Device Role / Timing Role: High-stability VCXO serving as master clock for CPRI/eCPRI protocol timing recovery and jitter attenuation circuits. Use Value: 0.494 ps RMS jitter (12 kHz–20 MHz) meets ITU-T G.8262 EEC-2 requirements; LVDS output ensures clean edge delivery over backplane traces. |
| Multi-Standard Wireless Infrastructure | Packet Timing Recovery in Metro Aggregation |
Use Scenario: Supporting concurrent LTE, NR, and Wi-Fi 6E operation in integrated small cells where frequency agility is required per band plan. IC Role / Device Role / Timing Role: Quad-default VCXO enabling instant clock switching between 122.88 MHz (LTE), 156.25 MHz (NR), and 245.76 MHz (Wi-Fi) via FSEL pins. Use Value: Four factory-programmed frequencies eliminate external configuration logic; I²C allows field updates for new band deployments without hardware change. |
Use Scenario: Recovering precise packet timing from 10G/25G Ethernet transport streams in metro aggregation routers requiring IEEE 1588 boundary clock accuracy. IC Role / Device Role / Timing Role: Low-phase-noise VCXO feeding a jitter cleaner IC or directly driving precision time-stamping circuitry. Use Value: Sub-0.5 ps RMS jitter enables <100 ns timestamp uncertainty; APR programmability allows fine-tuning for network delay compensation algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCXO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-PROG | Programmable XO (not VCXO); no analog VC input; fixed ±50 ppm pull range; uses DSPLL architecture | Lacks APR tuning capability - unsuitable for PLL-based holdover or frequency pulling applications | Select only if system uses digital-only frequency control and does not require analog voltage tuning |
| 8A34002 | Quad-output, I²C-programmable jitter attenuator with integrated PLL; supports 100–1300 MHz; requires external crystal | Higher integration (jitter cleaning + synthesis) but larger footprint and higher power (220 mA) | Choose when jitter attenuation is required alongside frequency generation; avoid if single-output VCXO simplicity is preferred |
Compared with Si510-PROG and 8A34002, the 8N4QV01LG-0144CDI uniquely combines analog VCXO tunability, quad-default frequency selection, and ultra-low jitter in a compact 5×7 mm package - making it optimal for space-constrained, voltage-controlled timing loops in wireless infrastructure.
Availability
8N4QV01LG-0144CDI is available at Aetrix Electronics and suitable for 5G baseband timing, CPRI/eCPRI fronthaul clocking, multi-standard wireless infrastructure, packet timing recovery, and industrial telecom equipment requiring stable component supply across extended temperature ranges.
Supply support for 8N4QV01LG-0144CDI 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, formed through the acquisition of IDT in 2019, is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and communications markets.
The 8N4QV01LG-0144CDI belongs to Renesas' FemtoClock® NG programmable timing portfolio, engineered specifically for high-frequency, low-jitter, software-reconfigurable clock generation in wireless infrastructure and high-speed networking applications.
FAQ
What is the factory-programmed default frequency set for 8N4QV01LG-0144CDI?
The 8N4QV01LG-0144CDI is factory-programmed with four default frequencies corresponding to order code "0144", which maps to 156.25 MHz, 125 MHz, 122.88 MHz, and 100 MHz - selected via FSEL0/FSEL1 combinations. These values are stored in volatile I²C registers and reload at each power cycle unless overwritten.
Does 8N4QV01LG-0144CDI support both 2.5 V and 3.3 V supply voltages simultaneously?
No, the 8N4QV01LG-0144CDI operates on a single supply: either 2.5 V ±5% or 3.3 V ±5%, as defined by its option code (K/L for 3.3 V/2.5 V ±20 ppm stability). The supply voltage must be stable and properly decoupled; mixing voltages is not supported and may damage the device.
Can the 8N4QV01LG-0144CDI be used as a standalone crystal oscillator without I²C configuration?
Yes, the 8N4QV01LG-0144CDI functions immediately after power-up using its four factory-programmed default frequencies. I²C is optional and only required for custom frequency programming, APR adjustment, or register modification - the device requires no I²C initialization to generate valid LVDS output.
What is the maximum guaranteed RMS phase jitter for 8N4QV01LG-0144CDI at 156.25 MHz?
The 8N4QV01LG-0144CDI guarantees RMS phase jitter of 0.757 ps (maximum) at 156.25 MHz over the 12 kHz–20 MHz integration bandwidth. The typical value is 0.494 ps, meeting stringent requirements for 10G/25G Ethernet and CPRI timing interfaces.
How is the absolute pull range (APR) configured on the 8N4QV01LG-0144CDI?
The APR of the 8N4QV01LG-0144CDI is configured via the I²C-accessible APR register (bits [15:0]), which sets the VCXO's total tuning range from ±4.5 ppm to ±754.5 ppm. This register works in conjunction with the ADC_GAIN[5:0] setting to define the oscillator gain (KV) and resulting voltage-to-frequency slope.
8N4QV01LG-0144CDI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- FemtoClock® NG
- Package/Case:
- 10-CLCC
- Packaging:
- Tray
- 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-0144CDI FAQ
1.How can I place an order for 8N4QV01LG-0144CDI through Aetrix?
Please submit a Request for Quotation (RFQ) for 8N4QV01LG-0144CDI 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-0144CDI reliable?
The price and inventory of 8N4QV01LG-0144CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4QV01LG-0144CDI is usually 5 days.
3.What payment methods are accepted for 8N4QV01LG-0144CDI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4QV01LG-0144CDI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8N4QV01LG-0144CDI?
8N4QV01LG-0144CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8N4QV01LG-0144CDI 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-0144CDI?
For technical support, including 8N4QV01LG-0144CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4QV01LG-0144CDI requirements.
6.How does Aetrix verify that 8N4QV01LG-0144CDI is sourced from the original manufacturer or authorized distributors?
All 8N4QV01LG-0144CDI 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-0144CDI meets industry standards.
7.What is the process for return or replacement of 8N4QV01LG-0144CDI?
All 8N4QV01LG-0144CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N4QV01LG-0144CDI, 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-0144CDI part is unused and in its original packaging.
Return procedure for 8N4QV01LG-0144CDI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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