SPK0813LM4H Equivalent & Substitute Parts

Part Overview

The SPK0813LM4H is a MEMS multimode microphone manufactured by Knowles, currently classified as obsolete. This product status necessitates identification of functionally equivalent alternatives for ongoing applications requiring MEMS microphone technology. The original part maintains RoHS compliance and MSL Level 1 rating, establishing baseline requirements for substitute selection.

Substiute Parts

SPK0813LM4H

KnowlesIn Stock: 769SPK0813LM4H Datasheet

Current PartRFQ

SPH0641LM4H-1

KnowlesIn Stock: 29314SPH0641LM4H-1 Datasheet

SimilarRFQ

SPH0641LM4H-1

KnowlesIn Stock: 29314SPH0641LM4H-1 Datasheet

SimilarRFQ

SPH0644LM4H-1

KnowlesIn Stock: 40686SPH0644LM4H-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPK0813LM4H are selected based on the following criteria derived from the provided parameters:

Primary Substitution Criteria:

• Manufacturer: Knowles (same manufacturer maintains design compatibility)
• Technology: MEMS (Silicon) microphone architecture
• Moisture Sensitivity Level: MSL 1 (Unlimited) for equivalent handling and storage
• RoHS Compliance: ROHS3 or equivalent for regulatory alignment
• Termination: Solder Pads (consistent assembly method)
• Physical Form Factor: Rectangular shape, comparable dimensions

Identified Substitute Parts:

• SPH0641LM4H-1 (Active status, digital PDM output)
• SPH0644LM4H-1 (Not For New Designs status, digital PDM output)

Parameter Comparison

Engineering Selection Recommendations

SPH0641LM4H-1 is the primary substitute candidate. This part maintains Active product status, ensuring ongoing manufacturer support and availability. It carries ROHS3 compliance and MSL Level 1 rating, matching the regulatory and handling requirements of the original SPK0813LM4H. The identical physical dimensions (4.60mm x 2.65mm x 1.08mm max height) and solder pad termination enable direct PCB integration without layout modifications.

SPH0644LM4H-1 serves as a secondary alternative. Although classified as Not For New Designs, it shares identical physical form factor, voltage range, and MSL rating with the primary substitute. This part is suitable for legacy system maintenance or applications where extended frequency response (20 Hz lower limit) is not required. The higher current consumption (1.4 mA versus 700 µA) must be evaluated against power budget constraints.

Both substitutes employ digital PDM output architecture, requiring firmware or signal processing adaptation if the original SPK0813LM4H utilized analog output. Voltage supply compatibility (1.6 V ~ 3.6 V) aligns with standard microcontroller and audio codec interfaces.

Frequently Asked Questions (FAQ)

Q: Can SPH0641LM4H-1 directly replace SPK0813LM4H without PCB modifications?

A: Physical dimensions and termination method are identical, enabling direct PCB replacement. However, output signal type (digital PDM versus unspecified original) requires verification of signal processing compatibility in the application circuit.

Q: What is the difference between SPH0641LM4H-1 and SPH0644LM4H-1?

A: Both parts share identical physical dimensions and voltage specifications. SPH0641LM4H-1 offers higher frequency response (45 Hz ~ 14.5 kHz) and lower power consumption (700 µA). SPH0644LM4H-1 provides extended low-frequency response (20 Hz) but requires higher supply current (1.4 mA). Product status differs: SPH0641LM4H-1 is Active; SPH0644LM4H-1 is Not For New Designs.

Q: Are both substitutes RoHS compliant?

A: Yes. Both SPH0641LM4H-1 and SPH0644LM4H-1 carry ROHS3 compliance certification, meeting current regulatory requirements for electronic components.

Q: What is MSL Level 1, and why does it matter?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component requires no special moisture control during storage or handling. All three parts—original and substitutes—share this rating, ensuring equivalent shelf-life and assembly process compatibility.

Q: Which substitute should be selected for new designs?

A: SPH0641LM4H-1 is the recommended choice for new designs, as it maintains Active product status and ensures long-term availability and manufacturer support.