page 1 of 4 date 06/2008 DESCRIPTION: electret condenser microphone PART NUMBER: CMC-2742WBL-25L SPECIFICATIONS directivity sensitivity (S) sensitivity reduction (ΔS-Vs) operating voltage output impedance (Zout) operating frequency (f) current consumption (IDSS) signal to noise ratio (S/N) operating temperature storage temperature dimensions weight material terminal RoHS dustproof and waterproof level omnidirectional -42 ±3 db f = 1KHz, 1Pa -3 dB f = 1KHz, 1Pa 2 V dc (standard), 10 V dc (max.) 2.2 KΩ f = 1KHz, 1Pa 100 ~ 20,000 Hz 0.5 mA max. Vs = 2.0 V dc 57 dBA f = 1KHz, 1Pa -20 ~ +70° C -20 ~ +70° C ø6.0 x 2.7 mm 0.22 g max. Al wire type (hand soldering only) yes IP57 note: We use the “Pascal (Pa)” indication of sensitivity as per the recomendation of I.E.C. (International Electrotechnical Commission). The sensitivity of “Pa” will increase 20dB compared to the “ubar” indication. Example: -60dB (0dB = 1V/ubar) = -40dB (1V/Pa) 0dB = 1V/Pa Vs = 2.0 ~ 1.5 V dc RL = 2.2KΩ A-weighted APPEARANCE DRAWING tolerances not shown: ±0.3mm MAX 4.1 2.7 0.2 6.0 0.2 25.0 3.0 (2 PLCS) UL1571, 30AWG 2.0 0.5 (2 PLCS) BLACK Terminal 2 RED Terminal 1 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 PART NUMBER: CMC-2742WBL-25L page 2 of 4 date 06/2008 DESCRIPTION: electret condenser microphone MEASUREMENT CIRCUIT RL = 2.2KΩ FREQUENCY RESPONSE CURVE 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 PART NUMBER: CMC-2742WBL-25L page 3 of 4 date 06/2008 DESCRIPTION: electret condenser microphone MECHANICAL CHARACTERISTICS item solderability (connector excepted) lead wire pull strength vibration drop test test condition evaluation standard Stripped wires of lead wires are immersed in 90% min. stripped wires will be rosin for 5 seconds and then immersed in a wet with solder. solder bath of 270 ±5°C for 3 ±0.5 seconds. (except the edge of the terminal) The pull force will be applied to double lead wire: No damage or cutting off. Horizontal 4.9N (0.5kg) for 30 seconds The part will be measured after applying a vibration amplitude of 1.5 mm with 10 to 55 Hz band of vibration frequency to each of the After any tests, the sensitivity 3 perpendicular directions for 2 hours. should be within ±3dB compared The part will be dropped from a height of to the initial measurement. 1 m onto a 20 mm thick wooden board 3 times in 3 axes (X, Y, Z) for a total of 9 drops. ENVIRONMENT TEST item high temp. test low temp. test humidity test temp. cycle test test condition After being placed in a chamber at +70°C for 72 hours. After being placed in a chamber at -20°C for 72 hours. After being placed in a chamber at +40°C and 90±5% relative humidity for 240 hours. The part shall be subjected to 10 cycles. One cycle will consist of: evaluation standard The part will be measured after being placed at +25°C for 6 hours. After any tests, the sensitivity should be within ±3dB compared to the initial measurement. TEST CONDITIONS standard test condition judgement test condition a) temperature: +5 ~ +35°C a) temperature: +25 ±2°C b) humidity: 45 - 85% b) humidity: 60 - 70% c) pressure: 860-1060 mbar c) pressure: 860-1060 mbar 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 PART NUMBER: CMC-2742WBL-25L page 4 of 4 date 06/2008 DESCRIPTION: electret condenser microphone PACKAGING 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383