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date
08/05/2022
page 1 of 4
MODEL: CMB-6544PF | DESCRIPTION: ELECTRET CONDENSER MICROPHONE
SPECIFICATIONS
parameter
conditions/description
directivity
omnidirectional
sensitivity (S)
f = 1 kHz, 1 Pa, 0 dB = 1 V/1 Pa
min
typ
max
units
-47
-44
-41
dB
4.5
10
Vdc
operating voltage
output impedance (Zout)
f = 1 kHz, 1 Pa
sensitivity reduction (∆S-Vs)
f = 1 kHz, 1 Pa, Vs = 4.5 ~ 1.5 Vdc
1
KΩ
-3
frequency (f)
dB
20
current consumption (LDSS)
Vs = 4.5 Vdc, RL = 1 KΩ
signal to noise ratio (S/N)
f = 1 kHz, 1 Pa, A-weighted
0.5
60
operating temperature
storage temperature
dimension
20,000
Hz
mA
dBA
-40
70
°C
-40
70
°C
0.7
g
ø9.4 x 6.5 mm
weight
material
AL
terminal
pin type (hand soldering only)
RoHS
yes
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)
MECHANICAL DRAWING
MEASUREMENT CIRCUIT
unit: mm
RL = 1.0 KΩ
6.5 0.2
5.0 1.0
(2 PLCS)
FET Impedance
converter
terminal 1
Term.1 C=1μF
RL
2.54 0.3
9.4 0.2
E.C.M
unit
0.4 0.1
(2 PLCS)
Output
+Vs
terminal 2
1.5±0.2
Shield Case
Schematic Diagram
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Term.2
-Ground
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CUI DEVICES | MODEL: CMB-6544PF | DESCRIPTION: ELECTRET CONDENSER MICROPHONE
date 08/05/2022 | page 2 of 4
FREQUENCY RESPONSE CURVE
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MECHANICAL CHARACTERISTICS
item
test condition
evaluation standard
soldering heat resistance
Soldering iron of +270 ±5°C should be placed on the
terminal for 2 ±0.5 seconds.
No interference in operation.
PCB wire pull strength
The pull force should be applid to double lead wire:
Horizontal 4.9 N (0.5 kg) for 30 seconds
No damage or cutting off.
vibration test
The part 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.
drop test
The part without packaging is subjected to 3 drops on each axis
from the height of 1 m onto a 20 mm thick wooden board.
After any tests, the sensitivity should be within
±3 dB of the initial sensitivity.
ENVIRONMENT TEST
item
test condition
evaluation standard
high temperature test
After being placed in a chamber at +70°C for 72 hours.
low temperature test
After being placed in a chamber at -20°C for 72 hours.
thermal shock
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:
After any tests and 6 hours of
conditioning at +25°C, the
sensitivity should be within ±3 dB of the initial
sensitivity.
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
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CUI DEVICES | MODEL: CMB-6544PF | DESCRIPTION: ELECTRET CONDENSER MICROPHONE
PACKAGING
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date 08/05/2022 | page 3 of 4
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CUI DEVICES | MODEL: CMB-6544PF | DESCRIPTION: ELECTRET CONDENSER MICROPHONE
date 08/05/2022 | page 4 of 4
REVISION HISTORY
rev.
description
date
1.0
initial release
05/15/2008
1.01
new template applied
09/15/2011
1.02
updated drawing
06/26/2012
1.03
widened operating temperature and storage temperature ranges
01/22/2014
1.04
brand update
01/17/2020
logo, datasheet style update
08/05/2022
1.05
The revision history provided is for informational purposes only and is believed to be accurate.
CUI Devices offers a one (1) year limited warranty. Complete warranty information is listed on our website.
CUI Devices reserves the right to make changes to the product at any time without notice. Information provided by CUI Devices is believed to be accurate
and reliable. However, no responsibility is assumed by CUI Devices for its use, nor for any infringements of patents or other rights of third parties which may
result from its use.
CUI Devices products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A
critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.
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- 5+6.05461
- 10+5.75052
- 20+5.47352
- 30+5.19859
- 50+4.93825