Renesas 252PMILF Clock/Frequency Synthesizer Equivalent & Substitute Parts

Part Overview

The Renesas 252PMILF is a Clock/Frequency Synthesizer with Fanout Distribution and Spread Spectrum Clock Generator functionality, designed for 200MHz maximum frequency operation in an 8-SOIC surface mount package. This part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The VersaClock® series architecture provides PLL-based clock generation with integrated bypass capability, supporting both clock and crystal inputs with CMOS output configuration.

Substiute Parts

252PMILF

Renesas Electronics CorporationIn Stock: 1125252PMILF Datasheet

Current PartRFQ

5L35021B-000NDGI

Renesas Electronics CorporationIn Stock: 7635L35021B-000NDGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 252PMILF requires evaluation against the following critical parameters that define functional equivalence within clock/timing IC categories:

Primary Substitution Criteria:

• Manufacturer: Renesas Electronics Corporation (same manufacturer ensures design continuity and support)
• Functional Type: Clock Generator or Clock/Frequency Synthesizer capability
• PLL Architecture: Presence of integrated PLL for frequency synthesis
• Input Support: Clock and/or Crystal input compatibility
• Output Configuration: CMOS or compatible logic level output
• Operating Temperature Range: Minimum -40°C ~ 85°C coverage
• Supply Voltage Compatibility: Overlapping or compatible voltage ranges
• RoHS/REACH Compliance: Maintained regulatory status

The 5L35021B-000NDGI qualifies as a manufacturer-recommended substitute based on shared Renesas platform, active product status, maintained compliance certifications, and compatible operational parameters within the clock generator category.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement Scenarios: The 5L35021B-000NDGI is the manufacturer-recommended substitute for the obsolete 252PMILF. Selection of this alternative is supported by:

• Active product status ensuring long-term availability and manufacturing support
• Identical Renesas platform heritage and design continuity
• Maintained compliance certifications (REACH Unaffected, EAR99 classification)
• Compatible operating temperature range (-40°C ~ 85°C)
• Enhanced frequency capability (250MHz vs. 200MHz)
• Unlimited moisture sensitivity rating (MSL 1)

Critical Design Considerations:

• Supply voltage redesign required: 252PMILF operates at 3.135V ~ 3.465V; 5L35021B-000NDGI requires 1.71V ~ 1.89V
• Package change from 8-SOIC to 20-VFQFN necessitates PCB layout modification
• Output configuration expansion: substitute provides LP-HCSL differential output in addition to LVCMOS
• Pin-to-pin compatibility cannot be assumed; full schematic and layout review is mandatory

Compliance Continuity: Both parts maintain REACH Unaffected status and EAR99 export classification. RoHS compliance status for the substitute should be confirmed with the supplier prior to design finalization.

Frequently Asked Questions (FAQ)

Q: Can the 5L35021B-000NDGI be used as a direct pin-for-pin replacement for the 252PMILF?

A: No. The 5L35021B-000NDGI uses a 20-VFQFN package compared to the 252PMILF's 8-SOIC package. Pin count, pinout, and physical dimensions differ significantly. A complete schematic and PCB layout redesign is required.

Q: What is the primary limitation when substituting the 252PMILF with the 5L35021B-000NDGI?

A: Supply voltage incompatibility is the primary design constraint. The 252PMILF operates at 3.135V ~ 3.465V, while the 5L35021B-000NDGI requires 1.71V ~ 1.89V. Power supply circuitry must be redesigned to accommodate the lower voltage requirement of the substitute.

Q: Are both parts compliant with current regulatory requirements?

A: Both parts maintain REACH Unaffected status and EAR99 export classification. The 252PMILF is ROHS3 Compliant. RoHS compliance for the 5L35021B-000NDGI should be verified with the supplier.

Q: Does the 5L35021B-000NDGI support the same input and output configurations as the 252PMILF?

A: Both parts support Clock and Crystal inputs. Output differs: the 252PMILF provides CMOS output, while the 5L35021B-000NDGI provides LP-HCSL and LVCMOS outputs. LVCMOS is CMOS-compatible; LP-HCSL is a differential output option not present in the original part.

Q: Why is the 252PMILF classified as Obsolete?

A: The 252PMILF is no longer in active production. The 5L35021B-000NDGI represents Renesas's current-generation equivalent within the clock generator product line, offering enhanced frequency capability and active manufacturing support.

Q: What is the frequency capability difference between these parts?

A: The 252PMILF supports maximum 200MHz operation. The 5L35021B-000NDGI supports maximum 250MHz operation, providing 25% higher frequency headroom for future design flexibility.

Q: Are there any package-related considerations for the substitute?

A: Yes. The 5L35021B-000NDGI uses a 20-VFQFN Exposed Pad package (3x3mm), which is significantly larger than the 8-SOIC package of the 252PMILF. PCB footprint, trace routing, and thermal management design must be re-evaluated for the new package geometry.