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PART NUMBER: DESCRIPTION: 1 of 4 ELECTRET CONDENSER MICROPHONE CME-1538-100LB SPECIFICATIONS parameter conditions/description min nom max units directivity omnidirectional sensitivity f= 1 KHz, 1Pa 0 dB= 1 V/Pa -41 -38 -35 dB operating voltage 2 10 V dc output impedance f= 1 KHz, 1Pa 2.2 K Ω sensitivity reduction f= 1 KHz, 1Pa Vs=2 V dc to 1.5 V dc -3 dBA frequency 20 20,000 Hz current consumption Vs=2 V dc RL=2.2 K Ω 0.5 mA signal to noise ration f= 1 KHz, 1 Pa A weighted 58 dBA operating temperature -30 80 °C storage temperature -30 80 °C dimenstions ø4 x H1.5 mm weight 0.1 g material brass (Au plating) terminal wire type RoHS yes dustproof/waterproof level IP67, IEC standard 529 edition 2.0 (1989) ±0.2mm UNLESS OTHERWISE TOLERANCE: SPECIFIED black (-) red (+) 0.2 1.5 0.059 4.0 0.157 0.15 4.0 (2 PLCS) 100.0 3.937 1.0 0.039 0.5 (2 PLCS) 2.9 0.114 MAX APPEARANCE DRAWING

PART NUMBER: DESCRIPTION: 2 of 4 ELECTRET CONDENSER MICROPHONE CME-1538-100LB ˀˋ˃ ˀˊ˃ ˀˉ˃ ˀˈ˃ ˀˇ˃ ˀˆ˃ ˀ˅˃ ˀ˄˃ FREQUENCY RESPONSE CURVE MEASUREMENT CIRCUIT

PART NUMBER: DESCRIPTION: 3 of 4 ELECTRET CONDENSER MICROPHONE CME-1538-100LB MECHANICAL CHARACTERISTICS item test condition evaluation standard soldering heat resistance Stripped wires are immersed in rosin for 5 seconds and then im- mersed in solder bath of 270 ±5°C for 3 ±0.5 seconds. 90% min. stripped wires should be wet with solder (except edge of terminal). PCB wire pull strength The force of 4.9 N is applied for 30 sec. to double lead wire. No damage or cutting off. vibration test The microphone should be measured after a vibration amplitude of 1.5 mm with 10 ~ 55 Hz band of vibration frequency to each of the 3 perpendicular directions for 2 hours. The sensitivity should be within ±3dB compared with the initial measurement.drop test The microphone without packaging is subjected to 3 drops on each axis from the height of 100 cm onto a 20 mm thick wooden board. ENVIRONMENT TEST item test condition evaluation standard high temperature test After being placed in a chamber at +80°C for 1 hour. The microphone will be measured after being placed at +25°C for 6 hours. The value of the oscillation frequency should be ±10% compared to the initial measurements. The SPL should be within ±3dB compared to the initial measurements. low temperature test After being placed in a chamber at -30°C for 1 hour. humidity test After being placed in a chamber at +40°C and 90 ±5% RH for 240 hours. temperature cycle test The part will be subjected to 10 cycles. One cycle will consist of: +80к +25 к + 2 5 к -30 к 1 h r 0 . 5 hr 1hr 0.5 hr 1hr 0.5 hr 1hr 5 . 5 hrs TEST CONDITIONS standard test conditions a) Temperature: +5 ~ +35°C b) Humidity: 45 ~ 85% c) Pressure: 860 ~ 1060 mbar judgement test conditions a) Temperature: +25 ±2°C b) Humidity: 60 ~ 70% c) Pressure: 860 ~ 1060 mbar

PART NUMBER: DESCRIPTION: 4 of 4 ELECTRET CONDENSER MICROPHONE CME-1538-100LB PACKAGING