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PCRT21ASX Datasheet - Page 10

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Piezoelectric Acoustic Generators
Piezo Ceramic Elements - External Drive Type
Specifications
(A type)
Resonant
Resonant
Model No.
Frequency
Impedance
(kHz)
( )
KBS-13DA-12A
12.0
1.2
700
KBS-15DA-9A-2
10.5
3.0
600
KBS-20DA-7A
16.6
1.0
300
KBS-20DA-7AS
17.5
1.0
300
KBS-23DA-4A
4.0
1.0
600
KBS-27DA-3A
13.0
0.5
1,500
KBS-27DA-5A
14.6
0.5
200
KBS-27DA-5AS
15.0
0.5
200
KBS-30DA-1A
11.4
0.5
500
KBS-35DA-3A
12.9
0.5
200
KBS-38DA-2AL
11.5
0.3
300
KBS-47DA-06A-3 0.70
0.20
700
KBS-50DA-06A
0.65
0.25
1,500
KBS-50DA-08A-3 0.87
0.25
3,000
KBS-50DA-1A
0.90
0.30
600
Measured at 120Hz, all others at 1kHz
Application Circuits For External-Drive Oscillation Buzzer
1M
CMOS LSI
I
I
I
.
....
Driving
Circuit
n
n
n
1
2
Crystal
Indicator
(LCD)
Watch Circuit
input
I.C. Oscillation Circuit (without feedback)
Static
Dimensions (mm)
Capacitance
Metal Disc
Ceramic Disc
Electrode
(pF)
( A)
( B)
15,000
30%
13.4
0.1
10.0
0.3
18,000
30%
15.0
0.1
12.0
0.3
10,000
30%
20.0
0.1
14.2
0.3
10,000
30%
20.0
0.1
14.2
0.3
12,000
30%
22.8
0.1
15.0
0.3
10,000
30%
27.0
0.1
14.2
0.3
20,000
30%
27.0
0.1
20.2
0.3
20,000
30%
27.0
0.1
20.2
0.3
48,000
30%
30.0
0.1
20.2
0.3
30,000
30%
35.0
0.1
25.0
0.5
36,000
30%
38.0
0.1
25.0
0.5
120,000 MIN.
46.94
0.1
25.0
0.5
120,000 MIN.
50.0
0.1
25.0
0.5
40,000
30%
50.0
0.1
25.0
0.5
45,000
30%
50.0
0.1
30.0
0.5
3k
2M
25mH
Alarm
3k
2M
2200pF
3k
2M
Hex Inverter
Ringing Circuit (for telephone)
1M
0.001 F
120k
1k
Metal Disc
Total Thickness
Metal Disc
Material
( C)
(T)
Thickness (t)
(19.0)
0.36
0.1
0.15
0.03
Brass
(11.0)
0.42
0.1
0.20
0.03
Brass
(13.0)
0.45
0.1
0.20
0.03
Brass
(13.0)
0.45
0.1
0.20
0.03 Stainless Steel
(14.0)
0.41
0.1
0.15
0.03
Brass
(13.0)
0.49
0.1
0.25
0.03
Brass
(19.0)
0.53
0.1
0.25
0.03
Brass
(19.0)
0.53
0.1
0.25
0.03 Stainless Steel
(19.0)
0.23
0.1
0.10
0.03
Brass
(23.5)
0.53
0.1
0.25
0.03
Brass
(23.5)
0.38
0.1
0.15
0.03
42-Alloy
(23.5)
0.28
0.1
0.15
0.03
Brass
(23.5)
0.28
0.1
0.15
0.03
Brass
(23.5)
0.44
0.1
0.20
0.03
Brass
(28.5)
0.44
0.1
0.20
0.03
Brass
0.022 F
I
1
0.022 F
I
3
0.022 F
Alarm
I
2
Quad NAND gate
55mH
Alarm
NOTE: Wherever possible,
the piezo devices should be
capacitive coupled to avoid
permanent DC bias and
possible long term damage.
9

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