

Overview
The MSM421ACT006 is a MEMS Microphone made by MEMS in a LGA-4(1.9x2.8) package with 4 pins. -42dB 0.95mm 1.85mm 1.8V 170Ω 175uA 2.75mm 59dB Analog output Omnidirectional Omnidirectional pickup LGA-4(1.9x2.8) MEMS Microphones ROHS.
PCBKit's library has its footprint (EasyEDA_Cloud:MIC-SMD_4P-L2.8-W1.9-P1.01-TL, from EasyEDA), ready for a KiCad board. 3,560 are in stock at JLCPCB (part C51928207). 1 open-source board in 1 repository on GitHub use it.
Symbol
The library has no symbol for this part yet.
Footprint
Parameters
11- Current Consumption
- 175uA
- Direction
- Omnidirectional
- Features
- Omnidirectional pickup
- Height
- 0.95mm
- Impedance
- 170Ω
- Length
- 2.75mm
- Output Type
- Analog output
- S/N Ratio
- 59dB
- Sensitivity
- -42dB
- Voltage - Supply
- 1.8V
- Width
- 1.85mm
Order codes
1- MSM421ACT006LCSC C51928207
Open-source boards using it
All 1- 4 layers86 × 56 mm

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<iframe src="https://pcbkit.io/embed/parts/mems/MSM421ACT006" title="MSM421ACT006 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/mems/MSM421ACT006.jpg" alt="MSM421ACT006" width="1200" height="900">[](https://pcbkit.io/parts/mems/MSM421ACT006)Questions
Is there a KiCad symbol and footprint for the MSM421ACT006?
Yes. the footprint EasyEDA_Cloud:MIC-SMD_4P-L2.8-W1.9-P1.01-TL, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MSM421ACT006?
LGA-4(1.9x2.8), with 4 pins. Its footprint is drawn on this page.
Where can I order the MSM421ACT006?
JLCPCB lists it as part C51928207, with 3,560 in stock; the sellers' links on this page open their listings.
What can replace the MSM421ACT006?
Parts like it in the library: the MSM381ACB026 by MEMS, the MSM381ADB001 by MEMS, the MSM381ACP003 by MEMS and the MSM381ACB022 by MEMS. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MSM421ACT006?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
5MSM381ACB026
LGA-3(1.9x2.8)-38dB 0.9mm 1.85mm 170Ω 175uA 2.75mm 3.6V 64dB Analog output Omnidirectional Omnidirectional pickup LGA-3(1.9x2.8) MEMS Microphones ROHSMEMSMEMS MicrophonesMSM381ADB001
LGA-5(2.7x3.5)-38dB -40℃~+105℃ 0.98mm 170Ω 175uA 2.65mm 3.5mm 65dB Analog output Omnidirectional Omnidirectional pickup LGA-5(2.7x3.5) MEMS Microphones ROHSMEMSMEMS MicrophonesMSM381ACP003
LGA-4(1.9x2.8)-38dB 1.85mm 1.8V 170Ω 175uA 1mm 2.75mm 64dB Analog output Omnidirectional Omnidirectional pickup LGA-4(1.9x2.8) MEMS Microphones ROHSMEMSMEMS MicrophonesMSM381ACB022
LGA-3(1.9x2.8)-38dB 0.9mm 1.85mm 1.8V 170Ω 175uA 2.75mm 64dB Analog output Omnidirectional Omnidirectional pickup LGA-3(1.9x2.8) MEMS Microphones ROHSMEMSMEMS MicrophonesMSM381AKT003
LGA-4(3x3.8)-38dB 1.25mm 1.8V 170Ω 175uA 2.95mm 3.76mm 66dB Analog output Omnidirectional Omnidirectional pickup LGA-4(3x3.8) MEMS Microphones ROHSMEMSMEMS Microphones