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Knowles Electronics, LLC
MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE

Product catalog summary

Overview: The SPC18P8LM4H-1 is a high-performance, low-power, bottom port silicon digital microphone with a single bit PDM output, utilizing Knowles’ SiSonic™ MEMS technology. It is designed for portable electronic devices requiring excellent audio performance and RF immunity.

Product Features:

Low distortion and high acoustic overload point (AOP).
Low current consumption in low-power mode.
Flat frequency response and high drive capability.
RF shielded with bottom port design.
Sensitivity matching and supports dual multiplexed channels.
Multiple performance modes: Sleep, Low-Power, Normal.
Ultra-stable performance and omnidirectional.
Standard SMD reflow and LGA package.

Typical Applications: Suitable for cellphones, laptops, tablets, digital cameras, and portable music recorders.

Acoustic & Electrical Specifications: Detailed specifications are provided for various parameters under different conditions, ensuring optimal performance across applications.

Performance Modes:

Low-Power Mode: 500 kHz ≤ Fclock ≤ 900 kHz, 1.65V ≤ Vdd ≤ 3.6V.
Normal Mode: 1.1 MHz ≤ Fclock ≤ 4.8 MHz, 1.65V ≤ Vdd ≤ 3.6V.
Sleep Mode: Fclock < 250 kHz, 1.65V ≤ Vdd ≤ 3.6V.
Powered Down Mode: Vdd = 0V.

Mechanical Specifications: Includes pin descriptions and example land and solder stencil patterns.

Packaging & Marking: Details on model number suffix, reel diameter, and component surface resistance.

Recommended Reflow Profile: Guidelines for Pb-Free soldering processes.

Reliability Specifications: Information on test descriptions to ensure product reliability.

Catalog excerpts

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-1

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE The SPC18P8LM4H-1 is a miniature, high-performance, low power, bottom port silicon digital microphone with a single bit PDM output. Using Knowles’ proven high performance SiSonic™ MEMS technology, the SPC18P8LM4H-1 consists of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. These devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other portable electronic devices where excellent wideband audio performance and RF immunity are required. In addition, the SPC18P8LM4H-1 offers multiple performance modes. Charge Pump MEMS Transducer ABSOLUTE MAXIMUM RATINGS PRODUCT FEATURES • Low Distortion /High AOP • Low Current Consumption in LowPower Mode • Flat Frequency Response • High Drive Capability • RF Shielded • Bottom Port • Sensitivity Matching • Supports Dual Multiplexed Channels • Multiple Performance Modes (Sleep, Low-Power, Normal) • Ultra-Stable Performance • Omnidirectional • Standard SMD Reflow • LGA Package TYPICAL APPLICATIONS Parameter Absolute Maximum Rating Portable Electronics Cellphones Laptop Computers Tablets Digital Still Cameras Portable Music Recorders knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the log

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-2

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-4

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-5

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE CLOCK DATA DATA (SELECT = Ground) CODEC OR APPLICATION PROCESSOR CODEC OR APPLICATION PROCESSOR Vdd Vdd CLOCK DATA CLOCK DATA Internal Logic Level Normal Mode 1.1 MHz ≤ Fclock ≤ 4.8 MHz 1.65V ≤ Vdd ≤ 3.6V Powered Down Mode Vdd = 0V Sleep Mode Fclock < 250 kHz 1.65V ≤ Vdd ≤ 3.6V Low-Power Mode 500 kHz ≤ Fclock ≤ 900 kHz 1.65V ≤ Vdd ≤ 3.6V knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Kn

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-6

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE PERFORMANCE CURVES knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-7

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-8

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE MECHANICAL SPECIFICATIONS Example Land Pattern Example Solder Stencil Pattern knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-9

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE PACKAGING & MARKING DETAIL Model Number Reel Diameter Surface Resistance (ohms) knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-10

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE RECOMMENDED REFLOW PROFILE tP Profile Feature knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LL

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-11

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE MATERIALS STATEMENT RELIABILITY SPECIFICATIONS Test knowles.com | DATASHEET SPC18P8LM4H-1 Rev A © 2021, Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

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MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE-12

MULTIMODE DIGITAL BOTTOM PORT SISONIC™ MICROPHONE SPECIFICATION REVISIONS Revision Specification Changes Knowles Corporation 1151 Maplewood Drive Itasca, Illinois 60143 Model/Reference Number: Datasheet SPC18P8LM4H-1 Rev A © Copyright 2021 Knowles

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