Renesas Electronics 181M-01LF Spread Spectrum Clock Generator - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 181M-01LF is a Spread Spectrum Clock Generator IC designed for 75MHz clock generation in 8-SOIC surface mount packaging. This component generates CMOS output signals from clock or crystal inputs with integrated Phase-Locked Loop (PLL) functionality. The 181M-01LF is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.

Substiute Parts

181M-01LF

Renesas Electronics CorporationIn Stock: 1020181M-01LF Datasheet

Current PartRFQ

181M-53LF

Renesas Electronics CorporationIn Stock: 884181M-53LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 181M-01LF is determined by strict equivalence across the following critical parameters:

• Frequency specification (75MHz maximum output)
• Output signal type (CMOS)
• Input signal compatibility (Clock or Crystal)
• PLL functionality (integrated Phase-Locked Loop)
• Input-to-Output ratio (1:1)
• Supply voltage range (3.135V ~ 5.5V)
• Package type (8-SOIC with 0.154" width, 3.90mm)
• Number of independent circuits (1)
• Operating temperature range (0°C ~ 70°C)

The Renesas Electronics 181M-53LF meets all these parameters and is classified as an active product, making it a direct functional equivalent for the obsolete 181M-01LF.

Parameter Comparison

Engineering Selection Recommendations

The 181M-53LF is the direct substitute for the obsolete 181M-01LF. Both parts share identical electrical specifications, package dimensions, and functional characteristics. The 181M-53LF carries Active product status, ensuring ongoing availability and manufacturing support. The 181M-53LF is RoHS3 Compliant, providing enhanced environmental compliance compared to the original part. Both components maintain REACH Unaffected status and EAR99 export classification. Selection of the 181M-53LF eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 181M-53LF be used as a direct replacement for the 181M-01LF in existing designs?

A: Yes. The 181M-53LF is electrically and mechanically identical to the 181M-01LF. Pin configuration, package dimensions (8-SOIC, 0.154" width, 3.90mm), supply voltage range (3.135V ~ 5.5V), frequency specification (75MHz), and output type (CMOS) are identical. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The 181M-01LF is classified as obsolete. The 181M-53LF is an active product from the same manufacturer with identical specifications, ensuring continued availability and manufacturing support.

Q: Are there any compliance differences between the two parts?

A: The 181M-53LF is RoHS3 Compliant, providing enhanced environmental compliance. Both parts maintain REACH Unaffected status and EAR99 export classification. Both have Moisture Sensitivity Level 1 (Unlimited).

Q: Do the parts have the same package footprint?

A: Yes. Both use 8-SOIC surface mount packaging with 0.154" width and 3.90mm body width. PCB footprints are identical.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution is based on matching frequency (75MHz), output type (CMOS), input compatibility (Clock or Crystal), PLL functionality, supply voltage range (3.135V ~ 5.5V), operating temperature (0°C ~ 70°C), package type (8-SOIC), and circuit count (1).