8V19N408ZNLGI

Overview

The 8V19N407 is a fully integrated FemtoClock NG Jitter Attenuator and Clock Synthesizer designed for wireless base station radio equipment. It features a two-stage PLL architecture: the first stage uses an external VCXO for jitter attenuation, while the second stage employs an internal VCO for frequency synthesis. The device provides five configurable differential clock outputs (LVPECL/LVDS) and four SYSREF outputs. It supports JESD204B implementations with phase alignment capabilities. Key electrical parameters include a typical RMS phase noise of less than 100fs at 614.4MHz (12kHz-20MHz offset). It operates on a 3.3V supply within a -40°C to +85°C temperature range in a 72-lead VFQFN package.

Feature Summary

• Two-stage PLL architecture with external VCXO input for jitter attenuation and internal VCO for frequency synthesis
• Five differential clock outputs and four SYSREF outputs with configurable LVPECL or LVDS formats
• Supports JESD204B subclass 0 and 1 with deterministic phase alignment between clocks and SYSREF signals
• SPI serial interface configuration with holdover capability for temporary loss of input signal

Applications

• Wireless base station radio equipment boards
• JESD204B clock implementations for data converters
• Telecommunication and networking end equipment

Procurement Notes

Verify the specific suffix variant required, as the datasheet distinguishes between 8V19N407-19 (fVCO 1900-2000MHz) and 8V19N407-24 (fVCO 2400-2500MHz). Confirm that the external VCXO component is sourced separately, as it is not included in the package. Ensure the design accommodates the 72-lead VFQFN thermal requirements.

Selection Notes

Select the appropriate VCO range variant based on the target output frequencies. The device requires an external VCXO for optimal phase noise performance; bypass mode is available but disables jitter attenuation. Check SPI interface voltage compatibility (3.3V/1.8V selectable) and ensure sufficient decoupling capacitors are placed near power pins for stability.

Part Context

This component belongs to the FemtoClock NG family from IDT, now part of Renesas Electronics. It is specifically engineered for high-reliability applications requiring precise timing management. The 8V19N407 serves as a core timing unit for wireless infrastructure, offering flexibility through programmable dividers and phase delay stages.

Replacement Considerations

Direct replacements must match the 72-lead VFQFN package and support the required VCO frequency range. Devices from the same FemtoClock NG family may offer similar functionality but often differ in output count or PLL architecture. Verify pinout compatibility if substituting with other models.