7BB-12-9 Murata, 7BB-12-9 Datasheet - Page 22

• Manufacturer Part Number: 7BB-12-9
• Description: Speakers & Transducers ACOUSTIC ELEMENT
• Manufacturer: Murata
• Series: 7BBr

Specifications of 7BB-12-9

• Magnet Material: Brass
• Diameter: 12 mm
• Frequency Range: 9 KHz
• Impedance: 1000 Ohms
• Capacitance: 8nF
• External Diameter: 12mm
• Resonant Frequency: 9kHz
• Transducer Function: Diaphragm
• Length/height, External: 0.1mm
• Outer Diameter: 12mm
• Sensor Operating Frequency: 8kHz To 10kHz
• Rohs Compliant: Yes
• Operating Temperature Max: 70°C
• Operating Temperature Min: -20°C
• Operating Frequency Range: 8kHz To 10kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Please read CAUTION and Notice in this catalog for safety. This catalog has only typical specifications. Therefore you are requested
to approve our product specification or to transact the approval sheet for product specification, before your ordering.
Washing of the component is not acceptable,
because it is not sealed.
1. The component may be damaged if mechanical stress
2. Please pay attention to protect operating circuit from
3. If DC voltage is applied to the component, silver migration
4. The resistor should be used as shown in Fig. A.
5. Please pay enough attention not to pull lead wire too
The following are examples of externally driven circuits.
(1) Unstable multi-vibrator using Tr.
(2) Circuits using inverters or NAND gates.
(1)
510
over this specification is applied.
surge voltage provided by something of force such as
falling, shock and temperature changing.
may occur. Please pay full attention not to subject the
component to DC voltage for long periods.
A suitable resistance value should be chosen, preferably
1k to 2k . Instead of this measure, a diode may also be
applied as shown in Fig. B.
much because wire may be broken or soldering point may
come off.
Circuit
Notice (Soldering and Mounting)
Notice (Handling)
20k
0.01 F
0.01 F
20k
510
1k
55mH
+V
Input
(2)
1M
120k
Piezoelectric Sounders (External Drive) Circuit/Notice
0.001 F
1k
1k
+V
IC
Fig.A
IC
Fig.B
R
P37E17.pdf 02.3.6
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