At 1 kHz, the 1.75 x 6.15 x 3.75-mm omni-directional devices have a nominal sensitivity of -42 dB, an output impedance of less than 100 ohms, and a total harmonic distortion of less than one percent at 100 dB SPL. The zero-height design allows engineers to achieve virtual 'zero additional height' on the topside of their PCB. The microphone can be assembled using standard automatic pick-n-place equipment, conform to lead-free requirements, and is compatible with typical industry Pb-free solder profiles (260°C reflow for 30 seconds maximum). This eliminates off-line hand assembly, bulky and expensive connectors, and associated testing and rework issues/costs typical with traditional ECMs. SiSonic° is available with a standard supply voltage range of 1.5 to 5V. It has integrated EMI/RFI protection, an important feature for hand-held communication devices. Another key attribute is the microphone's operating temperature. Compared to the typical rating of below 85°C for the ECMs, the SiSonic° is rated up to 100°C.