251M-22LF

Overview

The 251M-22LF is a high-performance clock generator, PLL, and frequency synthesizer solution manufactured by Renesas Electronics Corporation. It is designed to deliver precise frequency control for demanding electronic applications. The component belongs to the 251M series of clock generators. It functions as a programmable device capable of generating stable clock signals with low jitter characteristics suitable for high-speed digital systems.

Feature Summary

• Provides precise frequency control through integrated PLL technology
• Functions as a programmable clock generator and frequency synthesizer
• Designed for high-performance signal generation in complex digital architectures

Applications

• High-speed data communication interfaces requiring stable clock sources
• Network equipment and telecommunications infrastructure
• Test and measurement instruments needing precise frequency synthesis

Procurement Notes

Verify the exact suffix configuration against the original datasheet to ensure correct pinout and electrical specifications. Confirm RoHS compliance status and environmental certifications prior to integration. Check for any recent process change notices or material updates that may affect long-term availability. Ensure the selected package variant matches the PCB footprint requirements. Validate supply chain authenticity through authorized channels only.

Selection Notes

Evaluate the specific frequency range and output format requirements of the target application before selection. Compare jitter performance metrics against system timing budgets to ensure signal integrity. Consider power consumption levels relative to thermal constraints within the enclosure. Verify compatibility with existing reference clock inputs and control interfaces. Assess the need for additional external components such as filters or resonators based on the design topology.

Part Context

This component is part of Renesas' portfolio of precision timing solutions. It serves as a critical element in systems requiring reliable clock distribution. The 251M series is known for its flexibility in configuring multiple outputs from a single input source. It supports various packaging options to accommodate different board space constraints.

Replacement Considerations

The 251M-22LFT is listed as an obsolete alternative model. Designers should consult manufacturer recommendations for direct replacements. Verify functional equivalence regarding pinout and electrical parameters before substitution.