INMP441ACEZ-R7 Equivalent & Substitute Parts

Part Overview

The INMP441ACEZ-R7 is a MEMS digital microphone manufactured by TDK InvenSense, designed for omnidirectional audio capture in the 60 Hz to 15 kHz frequency range. It features I²S digital output, operates across 1.62 V to 3.63 V, and delivers -26dB ±3dB sensitivity at 94dB SPL with a 61dB signal-to-noise ratio. The component uses solder pad termination in a compact 4.72mm × 3.76mm rectangular package with 1.05mm maximum height.

The INMP441ACEZ-R7 is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, and long-term system reliability when original inventory becomes unavailable.

Substiute Parts

INMP441ACEZ-R7

TDK InvenSenseIn Stock: 2062INMP441ACEZ-R7 Datasheet

Current PartRFQ

ICS-43434

TDK InvenSenseIn Stock: 26279ICS-43434 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the INMP441ACEZ-R7 is determined by the following critical parameters:

Core Functional Requirements:

• Output interface: Digital I²S (mandatory match)
• Microphone type: MEMS (Silicon) (mandatory match)
• Directionality: Omnidirectional (mandatory match)
• Termination: Solder Pads (mandatory match)
• Port location: Bottom (mandatory match)

Electrical Compatibility Criteria:

• Voltage range must overlap or be contained within the application's supply voltage window
• Frequency response must cover or exceed the application's required bandwidth
• Sensitivity must be within acceptable tolerance for the audio system design
• Supply current must be compatible with power budget constraints

Physical Compatibility Criteria:

• Package dimensions must fit within PCB layout constraints
• Height must not exceed design clearance limits
• Shape must be rectangular to maintain footprint compatibility

The ICS-43434 meets all mandatory functional and physical requirements while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ICS-43434 is the qualified substitute for the obsolete INMP441ACEZ-R7. Selection is based on the following engineering criteria:

Product Status & Availability: The INMP441ACEZ-R7 is obsolete, making the ICS-43434 the necessary alternative for ongoing production and new designs. The ICS-43434 is in active production status with confirmed inventory availability (26,170 units in stock).

Functional Equivalence: Both components share identical core specifications: MEMS silicon technology, I²S digital output, omnidirectional pickup pattern, bottom-mounted solder pad termination, and MSL 1 moisture sensitivity rating. These parameters ensure direct functional compatibility in existing circuit designs.

Electrical Performance: The ICS-43434 meets or exceeds all electrical requirements of the INMP441ACEZ-R7. The substitute provides improved signal-to-noise ratio (64dB vs 61dB), tighter sensitivity tolerance (±1dB vs ±3dB), and extended frequency response (20 kHz vs 15 kHz upper limit). Supply current is significantly reduced (550 µA vs 1.6 mA), providing power efficiency benefits. The voltage range overlap (1.65 V to 3.63 V) is compatible with standard 3.3V and 1.8V supply rails used in audio applications.

Physical Compatibility: The ICS-43434 package is smaller (4.60mm × 2.65mm vs 4.72mm × 3.76mm) and lower profile (0.98mm vs 1.05mm), allowing direct substitution in existing PCB layouts with potential for improved board density.

Compliance & Certifications: The ICS-43434 carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Both components share EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the ICS-43434 be used as a direct replacement for the INMP441ACEZ-R7 in existing designs?

A: Yes. Both components use identical I²S digital interface, omnidirectional MEMS technology, bottom-mounted solder pad termination, and operate within overlapping voltage ranges (1.65 V to 3.63 V). No circuit modifications are required for functional substitution. The ICS-43434 package is physically smaller, allowing direct PCB footprint compatibility.

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

A: The ICS-43434 provides improved performance: 3dB higher signal-to-noise ratio (64dB vs 61dB), tighter sensitivity tolerance (±1dB vs ±3dB), extended frequency response to 20 kHz (vs 15 kHz), and significantly lower supply current (550 µA vs 1.6 mA). The ICS-43434 is also in active production, whereas the INMP441ACEZ-R7 is obsolete.

Q: Are there any voltage compatibility concerns?

A: The ICS-43434 minimum voltage is 1.65 V compared to the INMP441ACEZ-R7 minimum of 1.62 V. This 0.03 V difference is negligible in standard 3.3V and 1.8V supply applications. Both components operate to 3.63 V maximum. Verify your application's actual supply voltage range falls within 1.65 V to 3.63 V.

Q: Does the smaller package size of the ICS-43434 affect performance?

A: No. The reduced package dimensions (4.60mm × 3.76mm vs 4.72mm × 3.76mm) reflect improved manufacturing efficiency and do not impact acoustic or electrical performance. The microphone maintains identical omnidirectional characteristics and I²S interface specifications.

Q: What is the impact of the ICS-43434's lower supply current on system design?

A: The ICS-43434 consumes 550 µA versus 1.6 mA for the INMP441ACEZ-R7, representing a 65% reduction in microphone power consumption. This allows for lower overall system power budgets, reduced thermal dissipation, and extended battery life in portable applications.

Q: Are there any packaging or handling differences?

A: Both components have identical Moisture Sensitivity Level (MSL 1 - Unlimited), requiring no special storage or handling precautions. The ICS-43434 is available in Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for both prototype and production quantities.

Q: Can the frequency response difference (15 kHz vs 20 kHz) affect my application?

A: The ICS-43434 extends frequency response to 20 kHz, covering the full human hearing range and providing headroom for audio processing. If your application requires only 15 kHz bandwidth, the ICS-43434 remains fully compatible. If your application requires frequencies above 15 kHz, the ICS-43434 is the appropriate choice.