tcm2010-261-4p TDK Corp., tcm2010-261-4p Datasheet - Page 13

• Manufacturer Part Number: tcm2010-261-4p
• Description: Ferrite Chip Common-mode Filters For High-speed Signal Lines,
• Manufacturer: TDK Corp.

IEEE1394 differential signal waveform actual
measurement example/Speed Signal waveform
EMI countermeasure example
TCM2010
IEEE1394 interfaces
Differential Probe P7330
S400
Speed Signal
(TPB)
Eye pattern of data signal
Comparison (before/after countermeasure)
400bps
There is no deformation or degradation of eye pattern.
Radiation electric
field intensity
Comparison
(before/after
countermeasure)
A large suppressive
effect was gained for,
in particular,
the fundamental
wave and harmonic
component of
IEEE1394(S400) signal
200MHz.
for IEEE1394
Computer
TCM2010
One-Chip
Initial condition
(Through)
With TCM2010-201-4P
Micro
IDE HDD
TCM2010-201-4P
TPA
TPB
TPA
TPB
FET Probe P72400
Tektronix TDS7254
IEEE1394 Cable 4.5m
2.5
1.5
0.5
2
1
IEEE Terminal
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
0
10
10
Horizontal
Vertical
Initial condition(Through)
With TCM2010-201-4P
Initial condition(Through)
With TCM2010-201-4P
HDD
TDK CORPORATION
50nsec/div
Initial condition(Through)
Aside from the eye-pattern waveform, the essential consideration
in selecting a common-mode filter for the IEEE1394 interface line is
the level of effect on the speed signal waveform. This signal is sent
to detect data transmission speed (100, 200, and 400Mbps).
But because it is sent in the common mode, it is an essential control
factor to set a common-mode impedance value that will not sig-
nificantly distort the waveform. As shown in the measurement data
on the left, the TCM series has achieved a superb characteristic in
this regard.
TCM
1005,1210,1608, 2010 type
Frequency (MHz)
Frequency (MHz)
12
100
100
series
500ps/div
BACK
NEXT
With TCM2010-201-4P
14
Resolution:1600
100mV/div 500ps/div
TCM
x
1200(UXGA)
1000
1000
13