EA-21843-000

Microphones Overview

The Knowles EA-21843-000 is an omnidirectional MEMS microphone with dimensions of 5.56 x 3.98 x 2.21 mm and a sensitivity of -59 dBA. It features a 3-second acoustic port design, operates within a frequency range of 100 Hz to 4.25 kHz, and has an impedance of 3.5 kΩ at 1 kHz. The device requires a bias current of 50 µA and is RoHS compliant.

Microphones Feature Summary

• Omnidirectional acoustic response for uniform sound capture
• Integrated 3-second acoustic port for environmental protection
• Low power consumption suitable for battery-operated devices

Microphones Applications

• Voice recognition systems
• Mobile communication devices
• Hands-free telephony modules

Microphones Procurement Notes

Verify the specific suffix code against official Knowles documentation to confirm pinout and port configuration. Ensure compatibility with existing PCB layouts regarding the 5.56 x 3.98 mm footprint. Confirm RoHS compliance status through the manufacturer's latest certification records before finalizing procurement.

Microphones Selection Notes

Select this component when a compact omnidirectional microphone with low power requirements is needed. The 3.5 kΩ impedance matches standard preamplifier inputs. Consider the 3-second port duration for applications requiring moderate dust or moisture resistance without significant acoustic damping.

Microphones Part Context

This part belongs to the Knowles EA series of MEMS microphones. It shares the same physical envelope as the EA-21842-012 but differs in porting specifications. The series is designed for integration into portable audio electronics where space constraints are critical.

Microphones Replacement Considerations

EA-21842-012 offers similar dimensions but utilizes a 12-second port. EA-21843-C36 is a variant with different packaging or testing criteria. Verify electrical parameters and mechanical fit before substitution.