This document contains data proprietary to PUI Audio Inc. Any use or reproduction, in any form, without prior written permission of PUI Audio Inc. is prohibited. 2017, PUI Audio Inc. Data Sheet SMT-0440-T-R Though extremely small, the SMT-0440 series transducers are constructed almost exactly the same as electro-mechanical transducers three times their size. What this means for users is that PUI Audio is leveraging their decades of tried- and-true transducer design into each and every one of these, for the designers piece of mind. The 4mm square by 2mm high top-firing electro-mechanical SMT-0440-T-R transducer features a minimum SPL of 70 dBA at 10cm with only 3V (0-peak) input at 4 kHz. Features: Ultra-small design for wearable devices High output in a small, lightweight package Pick-and-place and reflow compatible Specifications Parameters Values Units Rated Voltage 3 Volts 0-peak Operating Voltage Range 2 ~ 4 Volts 0-peak Impedance 17 3 Ohms Minimum SPL (Rated voltage 10cm) 70 dBA Resonant Frequency 4,000 500 Hz Max Current Draw (Rated voltage, 50% duty cycle, at resonant frequency) 90 mA Housing Material LCP - Terminal Material Tin-plated Brass - Weight 0.1 Grams Operating Temperature -20 ~ +70 C Storage Temperature -30 ~ +80 C PUI Audio, Inc. A Projects Unlimited Company, 3541 Stop Eight Road, Dayton, OH 45414 Tel: (937) 415-5901 Fax: (937) 415-5925 This document contains data proprietary to PUI Audio Inc. Any use or reproduction, in any form, without prior written permission of PUI Audio Inc. is prohibited. 2017, PUI Audio Inc. Measurement Method (3V0-p sine-sweep) Frequency Response (measured with 3V0-p 10cm) Recommended Drive Circuit PUI Audio, Inc. A Projects Unlimited Company, 3541 Stop Eight Road, Dayton, OH 45414 Tel: (937) 415-5901 Fax: (937) 415-5925