844201BKI-45LFT

Specialized ICS Overview

The ICS844201BKI-45LFT is a PCI Express clock generator manufactured by Renesas Electronics Corporation, packaged in a 16-VFQFPN (3x3mm) surface-mount case. It synthesizes 100MHz or 125MHz reference clocks from a 25MHz crystal input using one differential LVDS output pair. The device operates on a full 3.3V supply with a typical power consumption of 95mA. It features an internal VCO range of 490MHz to 680MHz and delivers RMS phase jitter of 0.792ps at 100MHz and 0.773ps at 125MHz within the 12kHz–20MHz integration band. The component supports industrial temperature ranges from -40°C to 85°C.

Specialized ICS Feature Summary

• Synthesizes 100MHz or 125MHz reference frequencies from a 25MHz parallel resonant crystal
• Provides one differential LVDS output pair with low RMS phase jitter (0.792ps typ. at 100MHz)
• Compliant with PCI Express Gen 1 (2.5Gb/s) and Gen 2 (5Gb/s) jitter specifications
• Operates at full 3.3V supply voltage with -40°C to 85°C ambient temperature range

Specialized ICS Applications

• PCI Express Gen 1 and Gen 2 system reference clock generation
• High-speed digital systems requiring low-jitter clock distribution
• Compact electronic designs utilizing limited board space

Specialized ICS Procurement Notes

Verify the ordering suffix 'LFT' corresponds to Tape & Reel packaging as specified in the datasheet. Confirm the manufacturer designation aligns with Renesas Electronics Corporation following corporate acquisitions. Ensure the component meets RoHS 6 lead-free requirements for environmental compliance.

Specialized ICS Selection Notes

Select this component when a single differential LVDS output is sufficient for the design. The fixed multiplication values allow configuration for either 100MHz or 125MHz outputs via the FSEL pin. Consider the 16-VFQFN package dimensions for PCB layout constraints and verify thermal dissipation capabilities under maximum load conditions.

Specialized ICS Part Context

This part belongs to the FemtoClock Crystal-to-LVDS Clock Generator series. It is designed to replace older clock solutions by integrating the oscillator interface and frequency synthesis into a compact footprint. The device simplifies board design by eliminating external buffer components while maintaining strict timing accuracy for high-speed serial interfaces.

Specialized ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.