Ij

4 Line Ferrite Common
Mode Power Chokes
Steward's multi-line ferrite common mode power / data filter products provide the most
economical EMI filtering available for common mode noise. They provide EMI suppres
sion for groups of conductors such as power traces, and for high speed input/output
circuitry (including network and storage subsystems). They exhibit high frequency
impedance essentially independent of DC bias current.
Protected by one or more of the following US Patents: 5,455,552 and 5,568,111
Features:
?High current carrying capability (10 amps continuous operation) ?Can be used as multi-turn device to multiply impedance ?With
two turns, up to 800 ohms impedance at 300 MHz. ?Available in both thru-hole (B) and surface mount (R) versions ?The most
economical common mode filter available for filtering groups of signals ?Parts available in broad band and high frequency materials
Applications:
?Filtering DC power on PC boards, especially in applications of greater than 3.0 amperes ?Filtering common mode EMI on high
speed differential lines such as network and SCSI subsystems  ?Cost sensitive designs ?Applications where low DCR is needed.
Part & Test Specifications:
?Maximum current ratings ( I MAX ) are determined by testing to a maximum temperature rise of 40oC with continuous operating
current. ?Board level components are rated up to a maximum of 75 volts ?Part performance is shown with curves for Common, Open
and Normal Mode impedances measured along two conductors. Common Mode Iimpedance is the impedance of EMI noise
conducted in the same direction along two conductors. Open Circuit Impedance is the impedance measured across a single leg of
the common mode choke. Normal Mode Impedance is the total impedance to the differential circuit (both out and back).
Tested with: ?HP4396A (100KHz - 1.8 GHz) or HP8753 (to 6 GHz) Network/Spectrum analyzer ?HP43961A Impedance Test Kit
?HP16192A Test Fixture or Inter-Continental Microwave custom fixtures ?HP16200A DC Bias Adapter ?Philips PM2811 DC Power
Supply ?Ambient Temperature 23.5oC + 2o ?Bandwidth 3 kHz ?Sweep Time 423 ms ?Impedance is rated at + 25%@100MHz
PART NUMBERING SYSTEM
CM
4545
X
800
B
-
00
PRODUCT
PART
RATED
IMPEDANCE
PACKAGING
ADDITIONAL
SERIES CODE
SIZE CODE
CURRENT CODE
VALUE CODE
CODE
DESCRIPTION
Ambient Operating Temperature Range: -55? C to +125? C
RATED I MAX
A
B
C
D
E
IMPEDANCE (Z)
DCR
PART
Fig
mm
mm
mm
mm
mm
TYPICAL OHMS @
MAX
( continuous )
#
NUMBER
(inches)
(inches)
(inches)
(inches)
(inches)
100MHz 500MHz 1GHz
OHMS
mA
11.38 + 0.25
9.32 + 0.25
7.62 + 0.10
2.54 + 0.10
11.38 + 0.25
CM4545Z131B-00
130
270
230
0.003
10,000
1
(0.448 + 0.010)
(0.448 + 0.010)
(0.367 + 0.010)
(0.300 + 0.004)
(0.100 + 0.004)
11.38 + 0.25
9.32 + 0.25
7.62 + 0.10
2.54 + 0.25
11.38 + 0.25
CM4545Z131R-00
130
270
230
0.003
10,000
2
(0.448 + 0.010)
(0.448 + 0.010)
(0.367 + 0.010)
(0.300 + 0.004)
(0.100 + 0.010)
11.38 + 0.25
9.32 + 0.25
7.62 + 0.10
2.54 + 0.10
11.38 + 0.25
CM4545X800B-00
80
270
210
0.003
10,000
1
*
(0.448 + 0.010)
(0.448 + 0.010)
(0.367 + 0.010)
(0.300 + 0.004)
(0.100 + 0.004)
11.38 + 0.25
9.32 + 0.25
7.62 + 0.10
2.54 + 0.25
11.38 + 0.25
CM4545X800R-00
80
270
210
0.003
10,000
2
*
(0.448 + 0.010)
(0.448 + 0.010)
(0.367 + 0.010)
(0.300 + 0.004)
(0.100 + 0.010)
High Frequency Material
*
CM4545Z131B&R-00 (2 Turn)
CM4545Z131B&R-00 (2 Turn)
Z, R, XL vs. Frequency
Z vs. Frequency
Impedance, Resistance, Inductive Reactance
Open, Common and Normal Mode
600
500
500
400
400
300
300
200
Normal
200
Open
100
100
Z
Common
XL
R
0
0
1000
10000
10
100
1
1000
10
100
10000
1
Frequency (MHz)
Frequency (MHz)
STEWARD - U.S.A. ? Telephone: 423/867-4100 ? Fax 423/867-4102 ? Internet: http://www.steward.com
SCOTLAND ? Telephone: 44-(0)1-506-414200 ? Fax 44-(0)1-506-410694
20
SINGAPORE ? Telephone: (65)337-9667 ? Fax (65)337-9686
CM4545Z131B&R-00 (1 Turn)
CM4545Z131B&R-00 (1 Turn)
Z, R, XL vs. Frequency
Z vs. Frequency
Impedance, Resistance, Inductive Reactance
Open, Common and Normal Mode
700
700
600
600
500
500
400
400
300
300
Z
Open
200
200
R
Common
Normal
100
100
XL
0
0
1000
10000
1
10
100
10
1000
10000
1
100
Frequency (MHz)
Frequency (MHz)
CM4545X800B&R-00 (2 Turn)
CM4545X800B&R-00 (2Turn)
Z, R, XL vs. Frequency
Z vs. Frequency
Impedance, Resistance, Inductive Reactance
Open, Common and Normal Mode
1200
1200
1000
1000
800
800
600
600
Z
400
400
200
200
Normal
R
Open
XL
Common
0
0
100
1
10
1000
10000
1
10
100
1000
10000
Frequency (MHz)
Frequency (MHz)
CM4545X800B&R-00 (1 Turn)
CM4545X800B&R-00 (1Turn)
Z, R, XL vs. Frequency
Z vs. Frequency
Open, Common and Normal Mode
Impedance, Resistance, Inductive Reactance
400
400
300
300
200
200
Z
Open
Normal
100
100
XL
Common
R
0
0
10
100
10000
1
1000
1
1000
10000
10
100
Frequency (MHz)
Frequency (MHz)
Recommended Soldering Conditions
Land patterns for Reflow soldering
One Turn / Two Turn
Equivalent Circuits
STEWARD - U.S.A. ? Telephone: 423/867-4100 ? Fax 423/867-4102 ? Internet: http://www.steward.com
SCOTLAND ? Telephone: 44-(0)1-506-414200 ? Fax 44-(0)1-506-410694
21
SINGAPORE ? Telephone: (65)337-9667 ? Fax (65)337-9686