SPM0408LE5H-TB-6 Equivalent & Substitute Parts

Part Overview

The SPM0408LE5H-TB-6 is a MEMS silicon microphone from Knowles' SiSonic™ SPM series, designed for analog omnidirectional audio capture across the 100 Hz to 10 kHz frequency range. This component operates at 1.5 V to 5.5 V and delivers -18dB sensitivity at 94dB SPL with a 63dB signal-to-noise ratio. The device features bottom-mounted solder pad termination in a compact 4.72mm × 3.76mm × 1.35mm rectangular package.

The SPM0408LE5H-TB-6 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and ongoing system support.

Substiute Parts

SPM0408LE5H-TB-6

KnowlesIn Stock: 12409SPM0408LE5H-TB-6 Datasheet

Current PartRFQ

SPM0687LR5H-1

KnowlesIn Stock: 1180SPM0687LR5H-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPM0408LE5H-TB-6 must satisfy the following criteria based on allowed electrical and mechanical parameters:

• Manufacturer: Knowles (same manufacturer ensures design compatibility and quality standards)
• Type: MEMS (Silicon) microphone technology
• Output Type: Analog signal output
• Direction: Omnidirectional pickup pattern
• Frequency Range: Minimum coverage of 100 Hz to 10 kHz
• Sensitivity: Within ±3dB tolerance of -18dB @ 94dB SPL
• S/N Ratio: Minimum 63dB
• Impedance: 200 Ohms
• Voltage Range: Compatible with 1.5 V to 5.5 V supply
• Current Supply: Maximum 350 µA
• Termination: Solder Pads
• RoHS Compliance: RoHS Compliant or ROHS3 Compliant

The SPM0687LR5H-1 is identified as the manufacturer-recommended substitute and meets the core substitution criteria for this product category.

Parameter Comparison

Engineering Selection Recommendations

The SPM0687LR5H-1 is the manufacturer-recommended substitute for the obsolete SPM0408LE5H-TB-6. Selection of this substitute is supported by the following factors:

• Both components are manufactured by Knowles, ensuring consistent design philosophy and quality standards
• The SPM0687LR5H-1 maintains active product status, providing long-term availability and supply chain stability
• Both parts carry identical ECCN (EAR99) and HTSUS (8518.10.8030) classifications, ensuring regulatory consistency
• The SPM0687LR5H-1 meets ROHS3 compliance, which supersedes the RoHS compliance of the original part
• Manufacturer recommendation indicates validated electrical and mechanical compatibility for direct substitution

Frequently Asked Questions (FAQ)

Q: Can the SPM0687LR5H-1 directly replace the SPM0408LE5H-TB-6 in existing designs?

A: Yes. The SPM0687LR5H-1 is the manufacturer-recommended substitute and is designed for direct replacement in applications requiring MEMS silicon microphones with analog output and omnidirectional characteristics.

Q: What is the significance of the product status change from Obsolete to Active?

A: The transition from Obsolete to Active status ensures continued component availability, technical support, and supply chain reliability. Active products receive ongoing manufacturing and quality assurance, whereas obsolete products face potential discontinuation.

Q: Are there compliance differences between RoHS and ROHS3?

A: ROHS3 represents an updated compliance standard that supersedes RoHS. Both designations indicate lead-free and restricted substance compliance, with ROHS3 reflecting current regulatory requirements.

Q: What parameters determine substitution eligibility for this microphone category?

A: Substitution eligibility is determined by matching manufacturer, microphone type (MEMS silicon), output type (analog), directional pattern (omnidirectional), frequency range coverage, sensitivity tolerance, impedance, voltage range, current consumption, and termination method.

Q: Are there any package or footprint considerations for this substitution?

A: Package dimensions and termination type (solder pads) must be verified against your specific PCB layout. Consult the detailed datasheets for both parts to confirm mechanical compatibility with your application's physical constraints.