NUF6001MU
6-Channel EMI Filter with
Integrated ESD Protection
The NUF6001MU is a six−channel (C−R−C) Pi−style EMI filter
array with integrated ESD protection. Its typical component values of
R = 100
W
and C = 17 pF deliver a cutoff frequency of 120 MHz and
stop band attenuation greater than −30 dB from 800 MHz to 3.0 GHz.
This performance makes the part ideal for parallel interfaces with
data rates up to 80 Mbps in applications where wireless interference
must be minimized. The specified attenuation range is very effective
in minimizing interference from 2G/3G, GPS, Bluetooth® and
WLAN signals.
The NUF6001MU is available in the low−profile 12−lead
1.2x2.5mm UDFN12 surface mount package.
Features/Benefits
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MARKING
DIAGRAM
601MG
G
1
12
1
UDFN12
MU SUFFIX
CASE 517AE
601
M
G
•
±18
kV ESD Protection on each channel (IEC61000−4−2 Level 4,
•
•
•
•
Contact Discharge)
±16
kV ESD Protection on each channel (HBM)
R/C Values of 100
W
and 17 pF deliver Exceptional S21 Performance
Characteristics of 120 MHz f
3dB
and −30 dB Stop Band Attenuation
from 800 MHz to 3.0 GHz
Integrated EMI/ESD System Solution in UDFN Package Offers
Exceptional Cost, System Reliability and Space Savings
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
= Specific Device Code
= Month Code
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
NUF6001MUT2G
Package
UDFN12
(Pb−Free)
Shipping
†
3000 / Tape & Reel
Applications
•
EMI Filtering for LCD and Camera Data Lines
•
EMI Filtering and Protection for I/O Ports and Keypads
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
0
−10
−20
−30
−40
See Table 1 for pin description
−50
−60
1.0E+6
10E+6
100E+6
FREQUENCY (Hz)
1.0E+9
10E+9
Filter + ESD
n
Filter + ESD
n
C
d
= 17 pF C
d
= 17 pF
Figure 1. Electrical Schematic
S21 (dB)
R=100
W
Figure 2. Typical Insertion Loss Curve
©
Semiconductor Components Industries, LLC, 2009
1
March, 2018 − Rev. 5
Publication Order Number:
NUF6001MU/D
NUF6001MU
1
2
3
4
5
6
GND PAD
12 11 10 9 8 7
(Bottom View)
Figure 3. Pin Diagram
Table 1. FUNCTIONAL PIN DESCRIPTION
Filter
Filter 1
Filter 2
Filter 3
Filter 4
Filter 5
Filter 6
Ground Pad
Device Pins
1 & 12
2 & 11
3 & 10
4&9
5&8
6&7
GND
Filter + ESD Channel 1
Filter + ESD Channel 2
Filter + ESD Channel 3
Filter + ESD Channel 4
Filter + ESD Channel 5
Filter + ESD Channel 6
Ground
Description
MAXIMUM RATINGS
(T
J
= 25°C unless otherwise noted)
Parameter
ESD
IEC61000−4−2 (Contact Discharge)
Human Body Model
Machine Model
P
R
P
T
T
OP
T
STG
T
L
Symbol
Value
18
16
1.6
100
600
−40 to 85
−55 to 150
260
Unit
kV
DC Power per Resistor
DC Power per Package
Operating Temperature Range
Storage Temperature Range
Maximum Lead Temperature for Soldering Purposes (1.8 in from case for 10 seconds)
mW
mW
°C
°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
ELECTRICAL CHARACTERISTICS
(T
J
= 25°C unless otherwise noted)
Parameter
Maximum Reverse Working Voltage
Breakdown Voltage
Leakage Current
Resistance
Diode Capacitance
Line Capacitance
3 dB Cut−Off Frequency (Note 1)
6 dB Cut−Off Frequency (Note 1)
Symbol
V
RWM
V
BR
I
R
R
A
C
d
C
L
f
3dB
f
3dB
I
R
= 1.0 mA
V
RWM
= 3.3 V
I
R
= 20 mA
V
R
= 2.5 V, f = 1.0 MHz
V
R
= 2.5 V, f = 1.0 MHz
Above this frequency,
appreciable attenuation occurs
Above this frequency,
appreciable attenuation occurs
85
6.0
7.0
10
100
17
34
120
185
Test Conditions
Min
Typ
Max
5.0
8.0
100
115
22
44
Unit
V
V
nA
W
pF
pF
MHz
MHz
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. 50
W
source and 50
W
load termination.
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NUF6001MU
TYPICAL PERFORMANCE CURVES
(T
A
= 25°C unless otherwise specified)
0
−10
−20
S21 (dB)
S41 (dB)
1.0E+6
10E+6
100E+6
FREQUENCY (Hz)
1.0E+9
10E+9
−30
−40
−50
−60
0
−10
−20
−30
−40
−50
−60
−70
−80
10E+6
100E+6
1.0E+9
10E+9
FREQUENCY (Hz)
Figure 4. Typical Insertion Loss Curve
Figure 5. Typical Analog Crosstalk
2
110
108
NORMALIZED CAPACITANCE
1.5
106
RESISTANCE (W)
0
1
2
3
4
5
104
102
100
98
96
94
92
1
0.5
0
90
−40
−20
REVERSE VOLTAGE (V)
0
20
40
TEMPERATURE (°C)
60
80
Figure 6. Typical Capacitance vs.
Reverse Biased Voltage
(Normalized Capacitance, Cd @ 2.5 V)
Figure 7. Typical Resistance over Temperature
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NUF6001MU
Theory of Operation
The NUF6001MU combines ESD protection and EMI
filtering conveniently into a small package for today’s size
constrained applications. The capacitance inherent to a
typical protection diode is utilized to provide the
capacitance value necessary to create the desired frequency
response based upon the series resistance in the filter. By
combining this functionality into one device, a large number
of discrete components are integrated into one small
package saving valuable board space and reducing BOM
count and cost in the application.
Application Example
The accepted practice for specifying bandwidth in a filter
is to use the 3 dB cutoff frequency. Utilizing points such as
the 6 dB or 9 dB cutoff frequencies results in signal
degradation in an application. This can be illustrated in an
application example. A typical application would include
EMI filtering of data lines in a camera or display interface.
In such an example it is important to first understand the
signal and its spectral content. By understanding these
things, an appropriate filter can be selected for the desired
application. A typical data signal is pattern of 1’s and 0’s
transmitted over a line in a form similar to a square wave.
The maximum frequency of such a signal would be the
pattern 1−0−1−0 such that for a signal with a data rate of
100 Mbps, the maximum frequency component would be
50 MHz. The next item to consider is the spectral content of
the signal, which can be understood with the Fourier series
approximation of a square wave, shown below in
Equations 1 and 2 in the Fourier series approximation.
From this it can be seen that a square wave consists of odd
order harmonics and to fully construct a square wave n must
go to infinity. However, to retain an acceptable portion of the
waveform, the first two terms are generally sufficient. These
two terms contain about 85% of the signal amplitude and
allow a reasonable square wave to be reconstructed.
Therefore, to reasonably pass a square wave of frequency
x
the minimum filter bandwidth necessary is
3x.
All ON
Semiconductor EMI filters are rated according to this
principle. Attempting to violate this principle will result in
significant rounding of the waveform and cause problems in
transmitting the correct data. For example, take the filter
with the response shown in Figure 8 and apply three
different data waveforms. To calculate these three different
frequencies, the 3 dB, 6 dB, and 9 dB bandwidths will be
used.
Equation 1:
a
1
)
2
1 sin((2n
*
1)w t)
x(t)
+
0
2
p
n
+
1 2n
*
1
S
(eq. 1)
Equation 2 (simplified form of Equation 1):
sin(w
0
t) sin(3w
0
t) sin(5w
0
t)
x(t)
+
1
)
2
)
)
) AAA
(eq. 2)
p
1
3
5
2
−3 dB
−6 dB
−9 dB
Magnitude (dB)
f
1
f
2
f
3
100k
1M
10M
100M
Frequency (Hz)
1G
10G
Figure 8. Filter Bandwidth
From the above paragraphs it is shown that the maximum
supported frequency of a waveform that can be passed
through the filter can be found by dividing the bandwidth by
a factor of three (to obtain the corresponding data rate
multiply the result by two). The following table gives the
bandwidth values and the corresponding maximum
supported frequencies and the third harmonic frequencies.
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NUF6001MU
Table 2. Frequency Chart
Bandwidth
3 dB –
100 MHz
6 dB –
200 MHz
9 dB –
300 MHz
Maximum Supported
Frequency
33.33 MHz (f
1
)
66.67 MHz (f
2
)
100 MHz (f
3
)
Third Harmonic
Frequency
100 MHz
200 MHz
300 MHz
Considering that 85% of the amplitude of the square is in
the first two terms of the Fourier series approximation most
of the signal content is at the fundamental (maximum
supported) frequency and the third harmonic frequency. If a
signal with a frequency of 33.33 MHz is input to this filter,
the first two terms are sufficiently passed such that the signal
is only mildly affected, as is shown in Figure 9a. If a signal
with a frequency of 66.67 MHz is input to this same filter,
the third harmonic term is significantly attenuated. This
serves to round the signal edges and skew the waveform, as
is shown in Figure 9b. In the case that a 100 MHz signal is
input to this filter, the third harmonic term is attenuated even
further and results in even more rounding of the signal edges
as is shown in Figure 9c. The result is the degradation of the
data being transmitted making the digital data (1’s and 0’s)
more difficult to discern. This does not include effects of
other components such as interconnect and other path losses
which could further serve to degrade the signal integrity.
While some filter products may specify the 6 dB or 9 dB
bandwidths, actually using these to calculate supported
frequencies (and corresponding data rates) results in
significant signal degradation.
To ensure the best signal
integrity possible, it is best to use the 3 dB bandwidth to
calculate the achievable data rate.
Input Waveform
a) Frequency = f
1
Output Waveform
Input Waveform
b) Frequency = f
2
Output Waveform
Input Waveform
c) Frequency = f
3
Output Waveform
Figure 9. Input and Output Waveforms of Filter
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