WM7132PIMSE/RV Equivalent & Substitute Parts

Part Overview

The WM7132PIMSE/RV is a MEMS analog omnidirectional microphone manufactured by Cirrus Logic Inc., designed for applications requiring 62 Hz to 12.5 kHz frequency response with -38dB sensitivity at 94dB SPL. The device operates across a 1.5 V to 3.7 V supply range and features bottom-mounted solder pad termination in a compact 3.76mm × 2.95mm rectangular package.

This part has reached obsolete product status. Identifying equivalent substitute components is necessary to maintain design continuity and ensure component availability for ongoing production and maintenance requirements.

Substiute Parts

WM7132PIMSE/RV

Cirrus Logic Inc.In Stock: 32923WM7132PIMSE/RV Datasheet

Current PartRFQ

INMP510ACEZ-R7

TDK InvenSenseIn Stock: 94597INMP510ACEZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WM7132PIMSE/RV is determined by the following critical parameters:

• MEMS silicon construction with analog output
• Omnidirectional pickup pattern
• Sensitivity within -38dB range at 94dB SPL
• Voltage supply compatibility (1.5 V minimum, 3.7 V maximum operating range)
• Bottom port location with solder pad termination
• Compact rectangular form factor suitable for surface mount applications

The INMP510ACEZ-R7 from TDK InvenSense meets these core substitution criteria. While frequency response extends to 20 kHz (versus 12.5 kHz for the WM7132PIMSE/RV) and sensitivity tolerance is ±2dB (versus ±1dB), the fundamental electrical and mechanical compatibility parameters align within acceptable engineering tolerances for equivalent component selection.

Parameter Comparison

Engineering Selection Recommendations

The INMP510ACEZ-R7 serves as a functional equivalent for the obsolete WM7132PIMSE/RV based on matching core electrical and mechanical specifications. Both devices share identical sensitivity (-38dB @ 94dB SPL), signal-to-noise ratio (65dB), and omnidirectional MEMS architecture with analog output and solder pad termination.

The INMP510ACEZ-R7 carries RoHS3 compliance and REACH Unaffected status, providing regulatory alignment for current manufacturing standards. The WM7132PIMSE/RV is REACH Unaffected but lacks explicit RoHS documentation.

Key differences requiring circuit-level evaluation include impedance (350 Ohms versus 55 Ohms), which may necessitate signal conditioning adjustments, and extended frequency response (20 kHz versus 12.5 kHz), which expands the usable bandwidth. The INMP510ACEZ-R7 features improved moisture sensitivity classification (MSL 1 versus MSL 2A), reducing handling and storage constraints.

Frequently Asked Questions (FAQ)

Q: Can the INMP510ACEZ-R7 directly replace the WM7132PIMSE/RV without circuit modifications?

A: Both devices share identical sensitivity, S/N ratio, omnidirectional pattern, and solder pad termination. However, the impedance difference (350 Ohms versus 55 Ohms) requires evaluation of your signal conditioning circuit. Verify that your amplifier input impedance and coupling network accommodate the higher source impedance of the INMP510ACEZ-R7.

Q: What is the significance of the extended frequency range in the INMP510ACEZ-R7?

A: The INMP510ACEZ-R7 extends frequency response to 20 kHz compared to 12.5 kHz for the WM7132PIMSE/RV. This broader bandwidth is backward compatible with applications requiring only 12.5 kHz response. If your system includes anti-aliasing filters or signal processing tuned to 12.5 kHz, the extended response will not degrade performance.

Q: How do the sensitivity tolerances differ between these parts?

A: The WM7132PIMSE/RV specifies ±1dB tolerance, while the INMP510ACEZ-R7 specifies ±2dB tolerance at 94dB SPL. Both center at -38dB sensitivity. Applications requiring tighter sensitivity control should account for this tolerance variation in gain calibration procedures.

Q: Are there packaging or handling differences?

A: The INMP510ACEZ-R7 features MSL 1 (unlimited moisture exposure) versus MSL 2A (4 weeks) for the WM7132PIMSE/RV. This improves handling flexibility and reduces storage constraints. The INMP510ACEZ-R7 is also slightly smaller (3.35mm × 2.50mm × 1.10mm versus 3.76mm × 2.95mm × 1.20mm), which may benefit space-constrained layouts.

Q: What supply current difference should I account for?

A: The INMP510ACEZ-R7 draws 250 µA versus 240 µA for the WM7132PIMSE/RV. This 10 µA increase is negligible for most applications and does not require power supply redesign.