180M-51LF

Overview

The Renesas 180M-51LF is a spread spectrum clock generator IC housed in an 8-SOIC package. It operates with a single power supply ranging from 3.135V to 5.5V and supports frequencies up to 28MHz. The device features one circuit with a 1:1 input-to-output ratio, accepting clock or crystal inputs and providing CMOS outputs. It lacks differential signaling capabilities and does not include internal dividers or multipliers. Designed for surface mount installation, it functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Spread spectrum clock generation for EMI reduction
• Single 1:1 clock path with CMOS output
• Supports crystal or clock inputs
• Operates on 3.135V to 5.5V supply

Applications

• General purpose clock distribution systems
• Digital circuits requiring low EMI clock sources
• Embedded systems using 28MHz base clocks

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Product change notices indicate end-of-life status effective March 24, 2022. Verification of current availability requires checking distributor stock levels directly, as standard manufacturing has ceased.

Selection Notes

Designers should verify that the required output frequency does not exceed 28MHz. The device requires a 3.135V to 5.5V supply voltage and operates only in the 0°C to 70°C temperature range. Since the part is discontinued, alternative components with similar spread spectrum capabilities must be evaluated for pin compatibility and electrical specifications.

Part Context

The 180M-51LF belongs to the ICS180 series of clock generators produced by Integrated Circuit Specialists, now part of Renesas Electronics. This specific model represents a fixed-frequency variant within the family, distinguished by its 28MHz maximum output and 8-pin SOIC packaging.

Replacement Considerations

No public substitute part numbers are confirmed in the provided documentation. Due to the obsolete status, engineers must identify cross-reference parts based on functional equivalence rather than direct manufacturer substitution.