844251BGI-15LF

Clock Generators, PLLs, Frequency Synthesizers Overview

The Renesas Electronics Corporation 844251BGI-15LF is a FemtoClock Crystal-to-LVDS Clock Generator. It features one differential LVDS output and accepts an 18pF parallel resonant crystal input within the 23.2MHz to 30MHz range. The device generates output frequencies of 116MHz to 150MHz and 580MHz to 750MHz, with a VCO range of 580MHz to 750MHz. Typical RMS phase jitter at 125MHz using a 25MHz crystal is 0.46ps. It operates on a 2.5V supply (range 2.38V to 2.62V) or 3.3V, in a TSSOP-8 package with 0.65mm pitch.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a crystal oscillator interface for direct connection to 18pF parallel resonant crystals
• Provides a single differential LVDS output for low-jitter clock distribution
• Supports flexible frequency translation from crystal input to high-speed LVDS outputs

Clock Generators, PLLs, Frequency Synthesizers Applications

• Ethernet network infrastructure equipment
• High-speed data communication systems
• Server and storage controller clock generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors due to market availability variations. Confirm RoHS compliance status as the part may be obsolete. Check for lead-free packaging specifications if required by assembly processes. Validate electrical parameters against current design requirements before procurement. Ensure proper handling procedures are followed during storage and installation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when precise crystal-to-LVDS conversion is required for Ethernet applications. Consider the specific output frequency ranges and VCO capabilities for system timing needs. Evaluate the low phase jitter characteristics for signal integrity requirements. Assess power supply compatibility with available 2.5V or 3.3V rails. Review package dimensions for PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The 844251BGI-15LF belongs to the HiPerClocks family of clock generators developed by IDT, now part of Renesas Electronics. This series utilizes advanced technology to deliver high-performance timing solutions. The component serves as a specialized solution for generating precise clock signals in demanding digital environments, particularly where low jitter is critical for data transmission accuracy.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute: 8T49N241-998NLGI. Verify pinout and electrical compatibility before substitution.