WM7236IMSE/RV Equivalent & Substitute Parts

Part Overview

The WM7236IMSE/RV is a MEMS digital PDM omnidirectional microphone manufactured by Cirrus Logic Inc. It operates across a frequency range of 55 Hz to 12 kHz with a sensitivity of -26dB ±1dB @ 94dB SPL. The device features a compact 4.00mm × 3.00mm form factor with solder pad termination and is rated for 1.62 V to 2 V operation.

This part is currently obsolete. Identifying equivalent substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or redesign requirements for applications utilizing this microphone specification.

Substiute Parts

WM7236IMSE/RV

Cirrus Logic Inc.In Stock: 33741WM7236IMSE/RV Datasheet

Current PartRFQ

INMP621ACEZ-R7

TDK InvenSenseIn Stock: 66516INMP621ACEZ-R7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The INMP621ACEZ-R7 manufactured by TDK InvenSense qualifies as a substitute for the WM7236IMSE/RV based on the following alignment of critical parameters:

Matching Parameters:

• Type: MEMS (Silicon)
• Output Type: Digital, PDM
• Direction: Omnidirectional
• Port Location: Bottom
• Termination: Solder Pads
• Physical Dimensions: 4.00mm × 3.00mm (identical footprint)
• Height (Max): 1.10mm (identical height)

Substitution Basis: Both devices are omnidirectional MEMS silicon microphones with PDM digital output, bottom-mounted solder pad termination, and identical physical dimensions. This ensures mechanical and electrical interface compatibility at the PCB level. The INMP621ACEZ-R7 is an active product with current manufacturing support, addressing the obsolescence status of the WM7236IMSE/RV.

Parameter Comparison

Engineering Selection Recommendations

The INMP621ACEZ-R7 is the designated substitute for the obsolete WM7236IMSE/RV. Selection is based on:

• Product Status: The INMP621ACEZ-R7 maintains active manufacturing status with current supply chain availability, eliminating obsolescence risk.
• Compliance: The INMP621ACEZ-R7 is ROHS3 compliant, meeting current regulatory requirements. Both parts carry REACH Unaffected status and EAR99 ECCN classification.
• Physical Compatibility: Identical footprint (4.00mm × 3.00mm) and height (1.10mm) ensure direct PCB-level replacement without layout modification.
• Functional Compatibility: Both devices operate as omnidirectional MEMS silicon microphones with PDM digital output and bottom-mounted solder pad termination.
• Moisture Handling: The INMP621ACEZ-R7 features MSL 1 (Unlimited) versus MSL 2A (4 Weeks) for the original part, providing improved handling flexibility during assembly and storage.

Frequently Asked Questions (FAQ)

Q: Can the INMP621ACEZ-R7 directly replace the WM7236IMSE/RV without PCB modifications?

A: Yes. Both devices share identical physical dimensions (4.00mm × 3.00mm footprint, 1.10mm height), bottom port location, and solder pad termination. Direct PCB-level substitution is possible without layout changes.

Q: What are the key differences between these two microphones?

A: The INMP621ACEZ-R7 offers an extended frequency range (45 Hz ~ 20 kHz versus 55 Hz ~ 12 kHz), wider voltage tolerance (1.62 V ~ 3.63 V versus 1.62 V ~ 2 V), higher S/N ratio (65dB versus 63dB), and improved moisture sensitivity rating (MSL 1 versus MSL 2A). Sensitivity differs at -46dB ±2dB versus -26dB ±1dB @ 94dB SPL.

Q: Is the INMP621ACEZ-R7 compatible with existing firmware or signal processing designed for the WM7236IMSE/RV?

A: Both devices output PDM digital signals with omnidirectional response. Firmware compatibility depends on PDM clock and data line interface specifications. Consult device datasheets for detailed timing and protocol requirements.

Q: What is the packaging format for the INMP621ACEZ-R7?

A: The INMP621ACEZ-R7 is supplied in Cut Tape (CT) and Digi-Reel® packaging formats.

Q: Are there any supply chain advantages to using the INMP621ACEZ-R7?

A: Yes. The INMP621ACEZ-R7 is an active product with 66,409 pieces currently in stock, compared to the obsolete WM7236IMSE/RV. This ensures reliable long-term availability and reduces procurement risk.