SPM0423HE4H Equivalent & Substitute Parts

Part Overview

The SPM0423HE4H 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 -26dB ±4dB @ 94dB SPL and supports voltage operation from 1.6 V to 3.6 V. The device features digital PDM output and is terminated with solder pads in a compact rectangular form factor measuring 4.72mm x 3.76mm x 1.35mm maximum height.

The SPM0423HE4H is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

SPM0423HE4H

KnowlesIn Stock: 866SPM0423HE4H Datasheet

Current PartRFQ

SPK0641HT4H-1

KnowlesIn Stock: 692SPK0641HT4H-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPM0423HE4H is based on the following critical parameters that define functional and mechanical compatibility:

• Microphone Type: MEMS (Silicon) construction
• Output Interface: Digital PDM output
• Directional Pattern: Omnidirectional response
• Frequency Response: 100 Hz ~ 10 kHz operating range
• Sensitivity Level: -26dB ±4dB @ 94dB SPL
• Supply Voltage: 1.6 V ~ 3.6 V compatibility
• Termination Method: Solder pad connection
• Physical Footprint: Rectangular form factor with maximum height of 1.35mm
• Regulatory Compliance: REACH Unaffected, ECCN EAR99, HTSUS 8518.10.8030

The substitute part SPK0641HT4H-1 is identified as a manufacturer-recommended equivalent based on these core electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The SPK0641HT4H-1 is designated as the manufacturer-recommended substitute for the obsolete SPM0423HE4H. Both components are manufactured by Knowles and share identical regulatory classifications (ECCN EAR99, HTSUS 8518.10.8030) and moisture sensitivity ratings (MSL 1 - Unlimited).

The SPK0641HT4H-1 carries Active product status, ensuring ongoing availability and support. Additionally, the SPK0641HT4H-1 is ROHS3 compliant, providing enhanced environmental and regulatory alignment for new designs and production applications.

Selection of the SPK0641HT4H-1 is appropriate for applications requiring direct replacement of the obsolete SPM0423HE4H, with the added benefit of active product lifecycle status and modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Why is the SPM0423HE4H listed as obsolete? A: The SPM0423HE4H has reached end-of-life status. The SPK0641HT4H-1 is the manufacturer-recommended active substitute to ensure continued component availability and design continuity.

Q: What are the key compatibility criteria for substitution? A: Substitution is based on MEMS silicon microphone construction, digital PDM output interface, omnidirectional directional pattern, 100 Hz to 10 kHz frequency response, -26dB ±4dB sensitivity at 94dB SPL, 1.6 V to 3.6 V supply voltage compatibility, solder pad termination, and compact rectangular form factor with 1.35mm maximum height.

Q: Are there packaging differences between the main part and substitute? A: The SPM0423HE4H is specified with solder pad termination. The SPK0641HT4H-1 packaging details are available in bulk format. Detailed mechanical and electrical specifications for the SPK0641HT4H-1 should be confirmed against application requirements.

Q: What regulatory certifications apply to both parts? A: Both the SPM0423HE4H and SPK0641HT4H-1 are classified under ECCN EAR99 and HTSUS 8518.10.8030. Both carry MSL 1 (Unlimited) moisture sensitivity rating. The SPK0641HT4H-1 additionally carries ROHS3 compliance certification.

Q: Is the SPK0641HT4H-1 suitable for new designs? A: Yes. The SPK0641HT4H-1 is active product status with ROHS3 compliance, making it appropriate for new design implementations and production applications requiring MEMS digital PDM microphone functionality.