Renesas 8N3QV01EG-0014CDI8

Overview

8N3QV01EG-0014CDI8 from Renesas Electronics is a quad-frequency programmable VCXO using fourth-generation FemtoClock® NG technology, delivering LVPECL differential output with RMS phase jitter of 0.487ps (12kHz–20MHz) at 156.25MHz, absolute pull-range programmable from ±4.5 to ±754.5ppm, and operating across –40°C to +85°C for wireless infrastructure timing.

For engineers reviewing the 8N3QV01EG-0014CDI8 datasheet, 8N3QV01EG-0014CDI8 pinout, 8N3QV01EG-0014CDI8 application, or 8N3QV01EG-0014CDI8 equivalent, this device supports I2C-programmable frequency synthesis between 15.476MHz–866.67MHz and 975MHz–1.3GHz, four factory-default power-up frequencies selected via FSEL0/FSEL1, and 2.5V/3.3V supply flexibility with RoHS-compliant CD package.

Technical Context

The 8N3QV01EG-0014CDI8 integrates a 114.285MHz 3rd-overtone crystal oscillator driving a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, enabling high-resolution frequency synthesis with 435.9Hz ÷N step size. Its VCO operates at 1.95–2.6GHz, followed by a programmable post-divider (N = 2–126) and 2-bit pre-divider (P).

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are mapped to FSEL[1:0] inputs for immediate frequency selection; all registers are volatile and reload factory defaults on power cycle. The device supports APR programming via ADC_GAIN[5:0], yielding oscillator gain from 7.57ppm/V (3.3V) to 630ppm/V (2.5V), with VC input linearity ±0.1% BSL.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A-001 and Si5338A-A-GM, the 8N3QV01EG-0014CDI8 uniquely combines analog VCXO tunability, quad-default frequency selection, and sub-0.5ps jitter in a single LVPECL output-making it optimal for applications demanding both precision holdover and field-programmable agility without adding external components.

Availability

8N3QV01EG-0014CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport, and 5G small cell deployments requiring stable component supply, guaranteed long-term availability, and traceable RoHS-compliant sourcing.

Supply support for 8N3QV01EG-0014CDI8 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 8N3QV01EG-0014CDI8 belongs to Renesas' FemtoClock® NG programmable VCXO family, engineered specifically for low-jitter, frequency-agile timing in wireless infrastructure, telecom, and networking equipment operating across extended temperature ranges.

FAQ

What is the default output frequency behavior of the 8N3QV01EG-0014CDI8 at power-up?

At power-up, the 8N3QV01EG-0014CDI8 selects one of four factory-programmed frequencies based on the logic states of FSEL0 and FSEL1 pins, as defined in Table 3A of the datasheet. These default frequencies are stored in volatile I2C registers and reload automatically after each power cycle-no external programming is needed for basic operation. The specific default frequencies for 8N3QV01EG-0014CDI8 are determined by its order code and programmed during manufacturing.

Does the 8N3QV01EG-0014CDI8 support both 2.5V and 3.3V supply voltages simultaneously?

No-the 8N3QV01EG-0014CDI8 operates on a single supply voltage: either 2.5V ±5% or 3.3V ±5%, as specified by its option code ('B' or 'A', respectively). The 8N3QV01EG-0014CDI8 is not dual-supply capable; VCC must be connected to one nominal rail only. Both supply modes support identical LVPECL output levels, jitter performance, and I2C functionality, but oscillator gain (KV) and current draw differ per voltage mode.

How is the absolute pull-range (APR) programmed on the 8N3QV01EG-0014CDI8?

The APR of the 8N3QV01EG-0014CDI8 is programmed via the ADC_GAIN[5:0] register over I2C, which configures the oscillator gain (KV) from 7.57ppm/V (3.3V) to 477.27ppm/V (3.3V) or 10–630ppm/V (2.5V). Combined with the VC input range (0–VCC), this yields an APR of ±4.5ppm to ±754.5ppm. The 8N3QV01EG-0014CDI8 does not use fixed resistor networks-APR is fully digital and reconfigurable in-system.

Can the 8N3QV01EG-0014CDI8 generate frequencies outside the 15.476–866.67MHz and 975–1300MHz bands?

No-the 8N3QV01EG-0014CDI8's PLL architecture and divider constraints limit valid output frequencies strictly to two disjoint bands: 15.476–866.67MHz (with N = 3–126) and 975–1300MHz (with N = 2). Frequencies below 15.476MHz or between 866.67–975MHz are not synthesizable. This limitation arises from the 114.285MHz crystal reference and integer/fractional divider resolution boundaries defined in Equation (1) of the datasheet.

What termination is required for the LVPECL outputs of the 8N3QV01EG-0014CDI8?

The 8N3QV01EG-0014CDI8 LVPECL outputs (Q/nQ) require DC-coupled 50Ω termination to VCC–2V, as specified in Tables 5C and Figure 1A/B. For 3.3V operation, this means terminating to 1.3V using resistive networks (e.g., 84Ω to 3.3V + 125Ω to ground). For 2.5V operation, VCC–2V ≈ 0.5V, so termination approximates 50Ω to ground (Figure 2C). Improper termination causes signal distortion, increased jitter, and duty cycle degradation beyond 45–55%.