Very Low Profile
Tax Filters
Attenuates 12 or 16 kHz signals to
telco equipment by more than 25 dB.
Uses standard-value capacitor for either
12 or 16 kHz resonance
Designed to provide 25 dB minimum
attenuation at 12 or 16 kHz.
5
Schematic
Diagram
1
Electrical Specifications at 25
O
C
Part
Number
Inductance
(1)
+5%
(mH)
D.C. Resistance
Max.
(Ω)
D.C. Current
Max.
(mA)
Hi-Pot
Min.
(VAC)
Attenuates
12 or 16 kHz
F-3551
F-3552
F-3553
F-3554
2.58
1.44
7.96
4.52
14.0
10.0
28.0
20.0
70
90
70
90
1250
1250
1250
1250
12 kHz,
Parallel
L with C=68 nF
16 kHz,
Parallel
L with C=68 nF
12 kHz,
Series
L with C=22 nF
16 kHz,
Series
L with C=22 nF
1. Tested at 10KHz and 100 mV
RMS
Physical Dimensions
inches (mm)
}
Optional
use as
Dual
.079
(2.00)
TYP.
.020
(0.50)
TYP.
6
7
8
9
10
5
4
2
1
.660
(16.76)
MAX.
Use of F-3551 inductor in a parallel LC
configuration followed by a F-3553 in a
series configuration to provide more
than 40 dB attenuation of tax pulse signals
Use of F-3552 inductor in a parallel LC
configuration followed by a F-3554 in a
series configuration to provide more
than 40 dB attenuation of tax pulse signals
.027
(0.69)
.660
(16.76)
MAX.
.768
(19.50)
.172
(4.37)
MAX.
.053
(1.35)
Terminal #1 Indicator
Specifications subject to change without notice.
For other values & Custom Designs, contact factory.
TAXFILTR - 10/98
Rhombus
Industries Inc.
18
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971
Tax Pulse Filter Inductor
Single Inductance
Vary capacitor value for 12 KHz or 16 KHz
Rhombus Part Number:
F-3503
Electrical Specifications at 25
O
C
Materials used in the
construction of this
component meet or
exceed UL Class B and
can be operated up to 130
o
C
Parameter
Min.
Typ.
Max.
Units
Schematic
1
Inductance (Pins 1-3)
D.C. Resistance
Current
"12 KHz" Capacitor
"16 KHz" Capacitor
Single LC attenuation
Dual LC attenuation
1. Tested at 10KHz and 100 mV
RMS
6.19
10.5
6.52
12.05
6.84
13.6
70
mH
Ω
mADC
nF
nF
dB
dB
25.0
14.0
27.0
15.0
25
40
28.0
15.7
3
Table #1
Physical Dimensions in inches (mm)
“Tax Pulse” Frequencies
for various countries:
Country
Frequency
Austria
12 kHz
Belgium
16 kHz
Switzerland
12 kHz
Germany
16 kHz
Denmark
12 kHz
Spain
12 kHz
France
12 kHz
Great Britain
50 Hz*
Greece
16 kHz
Italy
12 kHz
Ireland
12 kHz
Israel
16 kHz
Norway
16 kHz
Netherlands
50 Hz*
Portugal
12 kHz
Sweden
12 kHz
Finland
16 kHz
Turkey
12 kHz
Yugoslavia
16 kHz
Australia
12 kHz
Czechoslovakia 16 kHz
*Common-mode
(longitudinal) signal
.450
(11.43)
MAX.
.025
(0.64)
TYP.
.200
(5.08)
.400
(10.16)
.571
(14.50)
MAX.
1
2
3
.551
(14.00)
MAX.
6
5
4
Specifications subject to change without notice.
For other values & Custom Designs, contact factory.
TAXFILTR - 10/98
Rhombus
Industries Inc.
19
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971
FPGA/CPLD
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