SPECIFICATION FOR APPROVAL CUSTOMER: PRODUCTS: MAGNETIC TRANSDUCER MODEL: ST-0503 DIMENSIONAL: 5.0× 5.0× 3.0 CUSTOMER CHECKED BY 211 N. First Street Minneapolis, MN. 55401 612-849-6205 www.soberton.com The Specification is confidential. APPROVED BY SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 1.0 DESCRIPTION AND APPLICATION This is a miniature electro-magnetic transducer. The transducer is recommended to be used for clock, telephone, modem, etc; this transducer is ROHS compliant. 2.0 SPECIFICATIONS NO. ITEMS SPECIFICATIONS 2-1 Rated Voltage 3.0 2-2 Operating Voltage 2.0 ~ 4.0 VDC 2-3 * Rated Current 100 mA (Max.) 2-4 Coil DC Resistance 12±2 2-5 * Sound Output at 10 cm 78 dBA(Min.) 2-6 Rated Frequency 4000 Hz 2-7 Housing Material LCP 2-8 Weight 0.1 g 2-9 Operating range temperature 2-10 Storage temperature range VDC -30℃ to +70℃ -40℃ to +85℃ *Measure value at rated voltage (3.0VDC) and rated frequency (4000 Hz, 1/2 duty square wave.). SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 3.0 FREQUENCY RESPONSE A : Frequency Response, Magn dB re 20.00µPa 100 90 80 dB 70 60 50 100 1000 Frequency(Hz) 4.0 STRANDARD DRIVE CIRCUIT 10000 SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 5.0 6.0 INSPECTION TEST FIXTURE FRAMEWORK AND MATERIAL ４ ３ ２ ５ ６ ７ ８ １ NO. 1 2 3 4 5 6 7 8 NAME BASE MAGNET DIAPHRAGM UPPER COVER COIL WEIGHT IRON CORE TERMINAL PAD MATERIAL LCP SmCo ALLOY OF IRON & NICKEL STAINLESS ENAMELLED Fe Fe Cu STEEL WIRE SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 7.0 RELIABILITY TEST No 7-1 7-2 7-3 Item Low temperature storage High temperature storage Condition Storage in -40℃ test box for 96 hours, then expose to room temperature for 2 to 4 hours. Storage in +85℃ test box for 96 hours, then expose to room temperature for 2 to 4 hours. Temperature Cycle 7-4 Static Humidity 7-5 Random Vibration 20 second Max. Transition time between Temp. extremes Precondition at +25℃ for 1 hour. Then expose to +70℃ with 90 to 95% relative humidity for 240 hours. Finally allow to dry at room ambient for 2 to 4hours before taking final measurements. Vibrate randomly from 20 to 2000Hz using the following PSD profile. It is a +3 2 dB/octave from 20Hz to 80Hz,then 0.053 g /Hz from 80Hz to 350Hz,and finally at -3dB/octave from 350Hz to 2000Hz.The PSD tolerance is ± 3dB from 20 to 1000Hz and ±6dB above 1000Hz.The Analyzer Bandwidth to be set at 25Hz BW from 20 to 200Hz, 50Hz BW to 1000Hz, and finally 100Hz BW to 2000Hz.The test time is 15 minutes per plane. 7-6 Drop Test 7-7 Operating Life Lead Pull Test 7-8 The Buzzer that is attached to a 100 gram fixture is dropped to concrete floor from 1.5 meters height. Drop three times in each of the six planes. Subject samples to +85℃for 1000 hours under rated power. Subject test leads to an increasing pull force between the lead and the transducer until destruction occurs. Record the point of destruction .The minimum pull strength is 1000 grams. SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 7-9 Reflow Soldering Recommendable reflow condition : Temp.ㄗ⊥ㄘ 245⊥ 220⊥ 200⊥ 150⊥ 50⊥ Timeㄗsecㄘ 7-10 Judgment At reliability 1 Change in sound output should be within =75 dB and tone quality is allowed. 2 No significant change both in appearance and structure . SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 8.0 MECHANICAL DRAWING Lead(+) Dummy Lead Lead(-) Dummy Lead Sound Port All dimensions are in mm Tolerance: ±0.2 mm 9.0 SOLDERING PATTERN All dimensions are in mm, Tolerance: ±0.2 mm SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. 10.0 PACKING REQUIREMENTS SPECIFICATIONS FOR TRANSDUCER The Specification is confidential. VOLUME 36X36X26CM List of packing 1 reel 1 CARTON 1000 PCS PRODUCTS 10000 PCS PRODUCTS