SPM1437HM4H-B Equivalent & Substitute Parts

Part Overview

The SPM1437HM4H-B is a MEMS digital PDM omnidirectional microphone manufactured by Knowles, part of the SiSonic™ series. This component operates across a frequency range of 100 Hz to 10 kHz with a sensitivity of -22dB ±3dB @ 94dB SPL and supports voltage operation from 1.6 V to 3.6 V. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

SPM1437HM4H-B

KnowlesIn Stock: 829SPM1437HM4H-B Datasheet

Current PartRFQ

SPK0641HT4H-1

KnowlesIn Stock: 692SPK0641HT4H-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPM1437HM4H-B is determined by alignment across the following critical parameters:

• Microphone Type: MEMS silicon construction
• Output Interface: Digital PDM format
• Directional Pattern: Omnidirectional response
• Frequency Response: 100 Hz to 10 kHz operating band
• Sensitivity Level: -22dB nominal sensitivity
• Supply Voltage Compatibility: 1.6 V to 3.6 V operation
• Physical Form Factor: Solder pad termination with compact rectangular geometry
• Regulatory Compliance: RoHS and REACH compliance status

The SPK0641HT4H-1 qualifies as a manufacturer-recommended substitute based on shared MEMS microphone architecture, digital PDM output capability, and equivalent regulatory compliance framework.

Parameter Comparison

Engineering Selection Recommendations

The SPK0641HT4H-1 is designated as the manufacturer-recommended substitute for the obsolete SPM1437HM4H-B. Both components share identical regulatory classification (ECCN EAR99, HTSUS 8518.10.8030) and equivalent moisture sensitivity ratings (MSL 1). The substitute maintains RoHS compliance with ROHS3 certification, representing current regulatory standards. The active product status of the SPK0641HT4H-1 ensures ongoing availability and manufacturing support, addressing the supply discontinuation of the SPM1437HM4H-B.

Frequently Asked Questions (FAQ)

Q: Can the SPK0641HT4H-1 directly replace the SPM1437HM4H-B in existing designs?

A: The SPK0641HT4H-1 is the manufacturer-recommended substitute and shares core MEMS microphone architecture with digital PDM output. Both components maintain identical regulatory classifications and moisture sensitivity levels. Design validation should confirm compatibility with specific application requirements.

Q: What is the difference in product status between these components?

A: The SPM1437HM4H-B is obsolete and no longer manufactured. The SPK0641HT4H-1 is active and currently in production, ensuring long-term supply availability and manufacturing support.

Q: Are there packaging differences between the main part and substitute?

A: The SPM1437HM4H-B is specified with solder pad termination. The SPK0641HT4H-1 is available in bulk packaging with equivalent solder pad termination, maintaining form factor compatibility.

Q: Do both components meet current RoHS requirements?

A: The SPM1437HM4H-B meets RoHS Compliant standards. The SPK0641HT4H-1 meets ROHS3 Compliant standards, representing current regulatory requirements. Both are compliant with applicable RoHS directives.

Q: Are there any supply chain or regulatory considerations for substitution?

A: Both components share identical ECCN (EAR99) and HTSUS (8518.10.8030) classifications, ensuring equivalent export and tariff treatment. The active status of the SPK0641HT4H-1 provides supply continuity for the discontinued SPM1437HM4H-B.