251PMILF

Overview

The Renesas 251PMILF is a single-output, field-programmable clock synthesizer belonging to the VersaClock family. It operates as a spread spectrum clock generator with a maximum output frequency of 200 MHz and accepts input frequencies from 3 to 150 MHz. The device utilizes Phase-Locked Loop (PLL) technology and features an internal One-Time Programmable (OTP) ROM for configuration via four addressable registers. Powered by a 3.3 V supply (3.15V–3.45V range), it provides CMOS outputs in an 8-SOIC package. Designed for EMI reduction, it supports input crystals or clocks within specified ranges.

Feature Summary

• Field-programmable architecture using OTP ROM and four configurable registers
• Spread spectrum modulation capability for system EMI reduction
• Single CMOS output with frequencies up to 200 MHz
• Integrated power-down feature that tri-states outputs and disables PLLs

Applications

• Replacing multiple discrete crystals and oscillators to save board space
• Generating precise clock signals for digital systems requiring low EMI
• Applications utilizing standard fundamental mode inexpensive crystals

Procurement Notes

The 251PMILF is classified as obsolete with a final order date of March 30, 2025. Verification of RoHS3 compliance and MSL Level 1 status is required for integration. Sourcing should confirm availability through authorized channels given the end-of-life status.

Selection Notes

Select this component when a single-output programmable synthesizer with spread spectrum capabilities is needed. Ensure the design accommodates the 3.3 V supply voltage and 8-SOIC footprint. Verify that the required output frequency falls within the 314 kHz to 200 MHz range and that the input source matches the crystal or clock frequency specifications.

Part Context

This part is part of the VersaClock series, designed to replace multiple oscillators. It uses IDT's VersaClock software for PLL and output configuration. The device employs an advanced low-power CMOS process and is available in lead-free packaging compliant with environmental standards.

Replacement Considerations

The 5P35021 is identified as a replacement product within the VersaClock 3S Programmable Clock Generator line.