181M-52LF

Overview

The 181M-52LF is a programmable clock synthesizer manufactured by Renesas Electronics Corporation. It belongs to the VersaClock family and is designed to generate precise clock signals from a single input crystal or oscillator. The device utilizes Phase-Locked Loop (PLL) technology to produce output frequencies up to 200 MHz. It features field programmability through an internal One-Time Programmable (OTP) ROM, allowing configuration via software tools without factory programming. The component supports spread spectrum modulation to reduce electromagnetic interference in system designs.

Feature Summary

• Field programmable architecture with OTP ROM for custom frequency generation
• Output clock frequencies ranging from 314 kHz to 200 MHz
• Configurable spread spectrum modulation for EMI reduction
• Single-output design replacing multiple discrete oscillators

Applications

• System clock generation for embedded processors
• EMI reduction in high-speed digital circuits
• Replacing fixed-frequency crystals and oscillators in space-constrained designs

Procurement Notes

Verify the specific suffix '52' against official Renesas documentation to confirm pinout compatibility and voltage levels. Check current product status as older VersaClock models may be discontinued or superseded by newer generations. Confirm moisture sensitivity level and reflow soldering profiles prior to assembly.

Selection Notes

Select this component when a single programmable source can replace multiple fixed oscillators. Ensure the required output frequency falls within the 314 kHz to 200 MHz range. Verify that the input crystal frequency matches the device's supported range of 5 to 27 MHz. Consider the 8-pin SOIC package constraints for PCB layout.

Part Context

This part is part of the IDT/Renesas VersaClock series, originally developed by Integrated Device Technology before its acquisition by Renesas. It serves as a low-cost solution for generating stable clock signals in consumer and industrial electronics where flexibility in frequency selection is required without custom factory programming.

Replacement Considerations

Direct replacements include other VersaClock programmable synthesizers such as the 5P35021. Verify register compatibility and output drive strength when substituting with newer variants in the same family.