CS7250B-CAZR Equivalent & Substitute Parts

Part Overview

The CS7250B-CAZR is a MEMS digital PDM omnidirectional microphone manufactured by Cirrus Logic Inc. with a sensitivity of -36dB ±1dB @ 94dB SPL and a frequency range of 35 Hz to 13 kHz. The device operates at 1.8 V nominal with a supply current of 650 µA and is housed in a 4.60mm x 2.65mm surface mount package with a maximum height of 0.98mm.

The CS7250B-CAZR has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this microphone.

Substiute Parts

CS7250B-CAZR

Cirrus Logic Inc.In Stock: 15460CS7250B-CAZR Datasheet

Current PartRFQ

ICS-41350

TDK InvenSenseIn Stock: 183531ICS-41350 Datasheet

MFR RecommendedRFQ

IM69D130V01XTSA1

Infineon TechnologiesIn Stock: 62919IM69D130V01XTSA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS7250B-CAZR are selected based on the following core electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Output type: Digital, PDM
• Direction: Omnidirectional
• MEMS silicon construction
• Sensitivity range: -36dB to -32dB (within ±4dB tolerance)
• S/N ratio: 64dB or higher
• Voltage range: Must accommodate 1.62 V minimum operating point
• Supply current: Acceptable range up to 1.3 mA for low-power applications

Mechanical Compatibility Criteria:

• Package type: Surface mount with solder pads or equivalent termination
• Footprint dimensions: 4.60mm x 2.65mm nominal (±0.5mm tolerance acceptable)
• Height: 0.98mm to 1.30mm maximum
• Port location: Bottom

Regulatory & Supply Criteria:

• Active product status preferred for long-term availability
• RoHS3 compliance
• REACH compliance status

The two substitute parts listed below meet these criteria and are suitable for direct replacement in applications designed for the CS7250B-CAZR.

Parameter Comparison

Engineering Selection Recommendations

ICS-41350 (TDK InvenSense): This substitute offers the closest mechanical compatibility with identical footprint dimensions (4.60mm x 2.65mm x 0.98mm). The device is active product status with RoHS3 compliance and unlimited moisture sensitivity rating. Sensitivity is -32dB ±1dB, which is 4dB higher than the original part. The voltage range extends to 3.63 V, providing broader supply compatibility. Supply current is 750 µA, representing a 15% increase over the original specification. Frequency response extends to 40 kHz, exceeding the original 13 kHz upper limit. This part is suitable for applications where the higher sensitivity and extended frequency response do not conflict with system design parameters.

IM69D130V01XTSA1 (Infineon Technologies): This substitute maintains identical sensitivity specification (-36dB ±1dB @ 94dB SPL) and achieves superior S/N ratio (69dB versus 66dB). The device is active product status with RoHS3 compliance and unlimited moisture sensitivity rating. The voltage range extends to 3.6 V, supporting broader supply flexibility. Supply current is 1.3 mA, representing a 2x increase over the original specification. Package dimensions are larger (4.00mm x 3.00mm x 1.30mm), requiring PCB layout verification. Frequency response spans 20 Hz to 20 kHz, covering the full audio spectrum. This part is suitable for applications where sensitivity matching and superior noise performance are prioritized and where the larger footprint can be accommodated.

Both substitute parts are active products with superior compliance ratings and unlimited moisture sensitivity, ensuring long-term supply chain stability and manufacturing reliability compared to the obsolete CS7250B-CAZR.

Frequently Asked Questions (FAQ)

Q: Can the ICS-41350 be used as a direct drop-in replacement for the CS7250B-CAZR?

A: The ICS-41350 offers identical footprint dimensions (4.60mm x 2.65mm) and maximum height (0.98mm), enabling direct PCB placement compatibility. However, the sensitivity difference of 4dB (-32dB versus -36dB) requires system-level verification. Applications with automatic gain control or software-based sensitivity adjustment can accommodate this difference. Applications with fixed gain stages require acoustic testing to confirm acceptable performance.

Q: Can the IM69D130V01XTSA1 be used as a direct drop-in replacement for the CS7250B-CAZR?

A: The IM69D130V01XTSA1 maintains identical sensitivity (-36dB ±1dB @ 94dB SPL) and superior noise performance (69dB S/N ratio). However, the package dimensions are larger (4.00mm x 3.00mm versus 4.60mm x 2.65mm), requiring PCB layout modification. The increased supply current (1.3 mA versus 650 µA) requires power budget verification. This part is suitable for applications where PCB space permits the larger footprint and where the enhanced noise performance provides system benefit.

Q: What are the key electrical differences between the substitute parts?

A: The ICS-41350 offers higher sensitivity (-32dB) and extended frequency response (50 Hz to 40 kHz) with lower supply current (750 µA). The IM69D130V01XTSA1 matches the original sensitivity (-36dB) and achieves superior noise performance (69dB S/N ratio) with extended frequency response (20 Hz to 20 kHz) but requires higher supply current (1.3 mA). Both parts support extended voltage ranges (1.65 V to 3.63 V and 1.62 V to 3.6 V respectively) compared to the original 1.62 V to 1.98 V specification.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both the ICS-41350 and IM69D130V01XTSA1 are RoHS3 compliant. The original CS7250B-CAZR compliance status is not specified in the available documentation.

Q: What is the moisture sensitivity level difference between the original and substitute parts?

A: The CS7250B-CAZR carries MSL rating 2A (4 weeks), indicating moderate moisture sensitivity with a 4-week floor life after moisture exposure. Both substitute parts carry MSL rating 1 (unlimited), indicating superior moisture resistance with unlimited floor life. This represents an improvement in manufacturing handling and storage flexibility.

Q: Which substitute part should be selected for a new design?

A: For new designs, both parts are active products with superior compliance and moisture ratings. The ICS-41350 is recommended where the original footprint must be preserved and where the 4dB sensitivity difference is acceptable. The IM69D130V01XTSA1 is recommended where sensitivity matching and superior noise performance are critical and where the larger footprint can be accommodated in the PCB layout.