DLFC9 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – EMI Filter Modules

Document 153
RS-232 EMI Filter Modules
Coilcraft’s EMI filter modules are an easy, effective way
to eliminate the problems of stray electromagnetic inter-
ference (EMI) in signal cables running between poorly
filtered equipment.
Available in DB-25, -15 and -9 versions, the modules
plug between an RS-232 cable and an input or output
port. Common mode magnetics filter all lines including
the frame ground, attenuating EMI over the critical
30 - 300 MHz range while leaving data signals totally
undisturbed.
Comparable EMI filters for circuit board mounting are also
available.
Male DB
B
© Coilcraft, Inc. 2009
Female DB
A
C
DLFC9
DLFC15
DLFC25
A
1.35
34,29
1.65
41,91
2.16
54,86
B
2.25
57,15
2.25
57,15
2.25
57,15
C
0.67
17,02
0.67
17,02
0.67
17,02
Pins
9
15
25
Typical Attenuation¹
-10
Differential Mode
0
10
Common _Mode
20
30
0.1
1
10
100
Frequency (MHz)
1000
1. Measured on HP 8753D network analyzer. Ref: 50 Ohms.
2. Operating temperature range –40°C to +85°C.
3. Electrical specifications at 25°C.
Specifications subject to change without notice. Document 153 Revised 11/26/02