SPECIFICATIONS THIS DOCUMENT CONTAINS DATA PROPRIETARY TO REVISION HISTORY PROJECTS UNLIMITED, INC. ANY USE OR LTR DESCRIPTION DATE APPROVED PARAMETERS VALUES UNITS WRERPIRTOTEDNU CPTEIROMNI,S SINIO ANN OY FF OPRROMJ, EWCTITSH UONULTI MPIRTIEODR, - RELEASED FROM ENGINEERING 11/2/2005 RATED VOLTAGE 1.5 Vdc INC. IS PROHIBITED. A REVISED PIN DIAMETER TOLERANCE 6/30/2008 B.R. ©2003, Projects Unlimited Inc. OPERATING VOLTAGE RANGE 1 ~ 3 Vdc B ADDED DRIVE CIRCUIT 2/17/2009 B.R. RATED CURRENT (MAX) 70 mA C REVISED TO INVENTOR 3-D DRAWING TEMPLATE 4/16/2009 B.R. COIL RESISTANCE 6.5 ± 1 OHM MINIMUM SPL @ 10 CM 88 dBA RESONANT FREQUENCY 2,731 ± 500 Hz RECOMMENDED DRIVE CIRCUIT OPERATING TEMPERATURE -20 ~ +70 °C +1.5V STORAGE TEMPERATURE -30 ~ +85 °C DC HOUSING MATERIAL NORYL - 50% Duty Electromechanical TERMINAL MATERIAL Sn PLATED COPPER - Cycle Audio Transducer WEIGHT 2 grams Positive Square (AT) 220 Ohm 2N2222A R 5.4 5 13.8`0.3 6.5`0.2 4.2 0.5 6.4 4.5 n0.6`0.05 (2) n12`0.2 7.5 NOTES: 1. ALL DIMENSIONS ARE IN MILLIMETERS. UNLESS OTHERWISE Designed by Date Checked by Date Approved by Date Drawn Date SPECIFIED: SIZE J.A.F. 11/2/2005 E.P. 11/2/2005 B.R. 11/2/2005 4/16/2009 DIMENSIONS ARE IN 2. SPECIFICATIONS SUBJECT TO CHANGE OR WITHDRAWL MILLIMETERS, AT-1427-ST-R WITHOUT NOTICE. TOLERA NCES A3 ARE ±0.5 AND ANGLES ARE ±3°. Edition Sheet 3. THIS PART IS RoHS 2002/95/EC COMPLIANT. AT-1427-ST-R.idw Transducer (Electro-Mech) - 1 / 1

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