Additional Resources: Product Page 3D Model PCB Footprint date 11/22/2019 page 1 of 4 MODEL: CMT-8540S-SMT-TR DESCRIPTION: MAGNETIC BUZZER TRANSDUCER FEATURES externally driven SMT rated frequency of 4000 Hz SPECIFICATIONS parameter conditions/description min typ max units Vo-p rated voltage 5.0 Vo-p operating voltage 1.0 6.0 Vo-p 0V current consumption at rated voltage, 4,000 Hz square wave, duty 150 mA rated frequency 4,000 Hz at 10 cm (A-weight), rated voltage, 4,000 Hz sound pressure level 100 dBA square wave, duty coil resistance 10 13 16 dimensions 8.5 x 8.5 x 4.0 mm weight 0.8 g material LCP terminal SMT type (Sn plating) operating temperature -20 70 C storage temperature -40 85 C RoHS yes Notes: 1. All specifications measured at 5~35C, humidity at 45~85%, under 86~106 kPa pressure, unless otherwise noted. SOLDERABILITY parameter conditions/description min typ max units reel storage at relative humidity <40% 25 C 2 reflow soldering see recommended reflow soldering profile 260 C 3 drying conditions bake at 40C for 24 hours Note: 2. It is recommended to reflow solder within 48 hours from opening vacuum packaging at a temperature <30C & relative humidity <60%. 3. When out of packaging for more than 48 hours. SMT Reflow Solder Profile (Pb Free) Peak Temp 260C 255C 20~40 sec 217C 200C 150C 60~180 sec 60~150 sec Time (sec) cuidevices.com Temperature (C) Additional Resources: Product Page 3D Model PCB Footprint CUI Devices MODEL: CMT-8540S-SMT-TR DESCRIPTION: MAGNETIC BUZZER TRANSDUCER date 11/22/2019 page 2 of 4 MECHANICAL DRAWING units: mm tolerance: 0.5 mm 32/ 5,7< 32/ 5,7< U<HD N:HH 6281 3257 32/ 5,7< 32/ 5,7< Recommended PCB Layout Top View FREQUENCY RESPONSE CURVE MEASUREMENT METHOD +VDC +2.5V 180 TR: 0 2SC1741AS cuidevices.com