DPX42xx

Document 282-1
Diplex Filters
For DOCSIS
1.0, 1.1, 2.0
These diplex filter modules provide both low pass and high
pass filtering in low cost units that meet the requirements of
the DOCSIS 1.0, 1.1 and 2.0 standards.They are intended
for two-way broadcast applications like cable modems, settop boxes and HFC cable network equipment.
The DPX-C parts are low-profile surface mount units
that require a minimum of board space. The DPX‑B are
shielded and come with an integrated coaxial F connector.
In addition to the designs shown here, Coilcraft can
custom-engineer diplexers for specific applications. For
free evaluation samples, contact Coilcraft or order them
on-line at www.coilcraft.com.
Low pass filter High pass filter
Part
DOCSIS
Insertion Return
Insertion Return
number
standard
Passband
loss
loss
Passband
loss
loss
Irms1
(mA)
DPX4254-B
DPX4254-C
1.0
1.0
5 – 42 MHz
5 – 42 MHz
≤1.0 dB
≤1.5 dB
≥15 dB
≥15 dB
54 – 860 MHz
54 – 860 MHz
≤1.5 dB
≤1.5 dB
≥15 dB
≥15 dB
500
150
DPX4288-B
DPX4288-C
1.1, 2.0
1.1, 2.0
5 – 42 MHz
5 – 42 MHz
≤1.5 dB
≤1.5 dB
≥10 dB
≥10 dB
88 – 860 MHz
88 – 860 MHz
≤1.5 dB
≤1.5 dB
≥10 dB
≥10 dB
500
150
1. Current that causes a 15°C temperature rise from 25°C ambient.
2. Operating temperature range –40°C to +85°C.
3. Electrical specifications at 25°C.
Schematic – Shielded Filters (-B)
Diplex filter
Schematic – Surface Mount Filters (-C)
High pass
filter
4
1
F connector (1)
F connector
Low pass
filter
1
2
3
2
5
High pass
Diplex
filter
3
Low pass
4, 5
Low pass (3)
Impedance: 75 ohms all ports
Ground (5)
High pass (2)
Ground (4)
Impedance: 75 ohms all ports
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 282-1 Revised 01/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 282-2
Shielded Diplex Filter – DPX4254-B
High pass response
0
0
20
20
40
40
S21
S31
Low pass response
60
60
80
80
100
1
10
100
100
1000
1
Frequency (MHz)
0
10
20
20
40
S32
S11
1000
Isolation
0
30
60
40
80
1
100
Frequency (MHz)
Return loss
50
10
10
100
100
1000
1
Frequency (MHz)
10
100
1000
Frequency (MHz)
Unshielded Diplex Filter – DPX4254-C
High pass response
0
0
20
20
40
40
S21
S31
Low pass response
60
60
80
80
100
1
10
100
100
1000
1
Frequency (MHz)
0
10
20
20
40
S32
S11
1000
Isolation
0
30
60
40
80
1
100
Frequency (MHz)
Return loss
50
10
10
100
1000
100
1
Frequency (MHz)
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
10
100
1000
Frequency (MHz)
Document 282-2 Revised 01/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 282-3
Shielded Diplex Filter – DPX4288-B
High pass response
0
0
20
20
40
40
S21
S31
Low pass response
60
60
80
80
100
1
10
100
100
1000
1
Frequency (MHz)
0
10
20
20
40
S32
S11
1000
Isolation
0
30
60
40
80
1
100
Frequency (MHz)
Return loss
50
10
10
100
100
1000
1
Frequency (MHz)
10
100
1000
Frequency (MHz)
Unshielded Diplex Filter – DPX4288-C
High pass response
0
0
20
20
40
40
S21
S31
Low pass response
60
60
80
80
100
1
10
100
100
1000
1
Frequency (MHz)
0
10
20
20
40
S32
S11
1000
Isolation
0
30
60
40
80
1
100
Frequency (MHz)
Return loss
50
10
10
100
1000
100
1
Frequency (MHz)
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
10
100
1000
Frequency (MHz)
Document 282-3 Revised 01/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 282-4
Dimensions – DPX4254-B, DPX4288-B Dimensions – DPX4254-C
A
A
C
B
D
E
B
F
F
G
G
I
3
1
2
5
D
3/8 - 32 UNEF 2A
F connector
H
H
Recommended
Land Pattern
Packaged 32 per tray
C
F
E
H
G
I
K L
J
4
A
B
C
D
max max max typ
E
F
G
H
I
J
K
L
1.0650.5600.215 0.1550.0500.3000.400 0.700 0.1200.0700.3050.545
27,05
14,225,46 3,941,277,6210,1617,783,051,787,7513,84
J
J
K
Dimensions – DPX4288-C
L
A
D
C
M
E
J
J
G
N
3
1
5
0.039 × 0.157
(4)
1,0 × 4,0
0.196 / 4,98
0.274 / 6,96
0.039 × 0.130
(2)
1,0 × 3,3
0.452 / 11,48
0.550 / 13,97
G
Packaged 32 per tray
J K
I
G
Recommended
Land Pattern
ABC D
maxmaxmax typ E F G H I J K
1.0650.560 0.215 0.155 0.050 0.400 0.800 0.1200.0700.3050.545
27,0514,22 5,46 3,94 1,2710,1620,323,051,787,7513,84
1.2745 / 32,37
0.9935 / 25,24
1.0945 / 27,80
0.2845 / 7,23
0.692 / 17,58
2
4
0
(4)
0
F
F
H
0.8025 / 20,38
0.1425 / 3,62
0.2405 / 6,11
0.3695 / 9,39
0
F
F
O
0.043
1,1
B
Recommended Board Layout
Packaged 25 per tray
A max B max C max
D
E
F
G
H
1.40 0.81 0.51 0.5800.1240.005 0.0351.303
35,56
20,5712,9514,733,15 1,27 0,8933,10
IJ K LMN O
0.855
0.1180.2290.3780.0910.3110.753
inches
21,72
3,00 5,82 9,602,317,9019,13mm
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 282-4 Revised 01/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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