2006 California Micro Devices Corp. All rights reserved.
02/06/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
1
CM1431
LCD and Camera EMI Filter Array with ESD Protection
Features
Four, six and eight channels of EMI filtering with
integrated ESD protection
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
15kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
30kV ESD protection on each channel (HBM)
Greater than 35dB attenuation (typical) at 1 GHz
TDFN package with 0.40mm lead pitch:
4-ch. = 8-lead TDFN
6-ch. = 12-lead TDFN
8-ch. = 16-lead TDFN
Tiny TDFN package size:
8-lead: 1.7mm x 1.35mm
12-lead: 2.5mm x 1.35mm
16-lead: 3.3mm x 1.35mm
Increased robustness against vertical impacts
during manufacturing process
Lead-free finishing
Applications
LCD and Camera data lines in mobile handsets
I/O port protection for mobile handsets, notebook
computers, PDAs etc.
EMI filtering for data ports in cell phones, PDAs or
notebook computers.
Wireless handsets
Handheld PCs/PDAs
LCD and camera modules
Product Description
The CM1431 is a family of pi-style EMI filter arrays with
ESD protection, which integrates four, six and eight fil-
ters (C-R-C) in small form factor TDFN 0.40mm pitch
packages. The CM1431 has component values of
15pF-100
-15pF per channel. The CM1431 has a cut-
off frequency of 120MHz and can be used in applica-
tions with data rates up to 48Mbps. The parts include
ESD diodes on every pin, which provide a very high
level of protection for sensitive electronic components
that may be subjected to electrostatic discharge (ESD).
The ESD protection diodes safely dissipate ESD
strikes of
15kV, well beyond the maximum require-
ment of the IEC61000-4-2 international standard.
Using the MIL-STD-883 (Method 3015) specification
for Human Body Model (HBM) ESD, the pins are pro-
tected for contact discharges at greater than
30kV.
These devices are particularly well-suited for portable
electronics (e.g. wireless handsets, PDAs, notebook
computers) because of their small package and easy-
to-use pin assignments. In particular, the CM1431 is
ideal for EMI filtering and protecting data and control
lines for the I/O data ports, LCD display and camera
interface in mobile handsets.
The CM1431 is housed in space-saving, low-profile 8-,
12- and 16-lead TDFN packages with a 0.40mm pitch
and is available with lead-free finishing. This smaller
size TDFN package provides up to 42% board space
saving vs. the 0.50mm pitch TDFN packages.
100
15pF
15pF
FILTER+ESDn*
GND
FILTER+ESDn*
Electrical Schematic
1 of 4, 6 or 8 EMI/RFI + ESD Channels
* See Package/Pinout Diagram
for expanded pin information.
R
C
C
2006 California Micro Devices Corp. All rights reserved.
2
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
02/06/06
CM1431
Ordering Information
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
PIN DESCRIPTIONS
DEVICE PIN(s)
NAME
DESCRIPTION
DEVICE PIN(s)
NAME
DESCRIPTION
-04
-06
-08
-04
-06
-08
1
1
1
FILTER1 Filter + ESD Channel 1
8
12
16
FILTER1 Filter + ESD Channel 1
2
2
2
FILTER2 Filter + ESD Channel 2
7
11
15
FILTER2 Filter + ESD Channel 2
3
3
3
FILTER3 Filter + ESD Channel 3
6
10
14
FILTER3 Filter + ESD Channel 3
4
4
4
FILTER4 Filter + ESD Channel 4
5
9
13
FILTER4 Filter + ESD Channel 4
5
5
FILTER5 Filter + ESD Channel 5
8
12
FILTER5 Filter + ESD Channel 5
6
6
FILTER6 Filter + ESD Channel 6
7
11
FILTER6 Filter + ESD Channel 6
7
FILTER7 Filter + ESD Channel 7
10
FILTER7 Filter + ESD Channel 7
8
FILTER8 Filter + ESD Channel 8
9
FILTER8 Filter + ESD Channel 8
GND PAD
GND
Device Ground
PACKAGE / PINOUT DIAGRAMS
Notes:
BOTTOM VIEW
CM1431-06DF/DE
12 Lead TDFN Package
(Pins Up View)
TOP VIEW
(Pins Down View)
1) These drawings are not to scale.
CM1431-08DF/DE
16 Lead TDFN Package
CM1431-04DF/DE
8 Lead TDFN Package
GND
PAD
XXXX
GND
4
3
2
1
4
3
2
1
8
9
10
11
PAD
9
10
11
12
8
5
5
12
6
7
7
6
4
3
2
1
5 6 7 8
XXXXX
GND
4
3
2
1
12
13
14
15
PAD
13
14
15
16
12
5
16
11
11
6 7
10 9
8
10 9
4
3
2
1
5
6
7
8
BOTTOM VIEW
(Pins Up View)
TOP VIEW
(Pins Down View)
BOTTOM VIEW
(Pins Up View)
TOP VIEW
(Pins Down View)
Pin 1
XX
4
3
2
1
5
6
7
8
Marking
Pin 1
Marking
Pin 1
Marking
PART NUMBERING INFORMATION
Pins
Package
Standard Finish
Lead-free Finish
Ordering Part
Number
1
Part Marking
Ordering Part
Number
1
Part Marking
8
TDFN-8
CM1431-04DF
WF
CM1431-04DE
WE
12
TDFN-12
CM1431-06DF
N31F
CM1431-06DE
N31E
16
TDFN-16
CM1431-08DF
N318F
CM1431-08DE
N318E
2006 California Micro Devices Corp. All rights reserved.
02/06/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
3
CM1431
Specifications
Note 1: T
A
=25
C unless otherwise specified.
Note 2: ESD applied to input and output pins with respect to GND, one at a time.
Note 3: These parameters are guaranteed by design and characterization.
Note 4: Attenuation / RF curves characterized by a network analyzer using microprobes.
Note 5: These parameters are NOT guaranteed by design, characterization and production.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNITS
Storage Temperature Range
-65 to +150
C
DC Power per Resistor
100
mW
DC Package Power Rating
500
mW
STANDARD OPERATING CONDITIONS
PARAMETER
RATING
UNITS
Operating Temperature Range
-40 to +85
C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R
Resistance
80
100
120
C
TOTAL
Total Channel Capacitance
At 2.5VDC Reverse Bias, 1MHz,
30mVAC
24
30
36
pF
C
Capacitance C
At 2.5VDC Reverse Bias, 1MHz,
30mVAC
12
15
18
pF
V
DIODE
Standoff Voltage
I
DIODE
=10
A
6.0
V
I
LEAK
Diode Leakage Current (reverse bias)
V
DIODE
=
+
3.3V
0.1
1.0
A
V
SIG
Signal Clamp Voltage
Positive Clamp
Negative Clamp
I
LOAD
= 10mA
I
LOAD
= -10mA
5.6
-1.5
6.8
-0.8
9.0
-0.4
V
V
V
ESD
In-system ESD Withstand Voltage
a) Human Body Model, MIL-STD-883,
Method 3015
b) Contact Discharge per IEC 61000-4-
2 Level 4
Notes 2 and 3
30
15
kV
kV
R
DYN
Dynamic Resistance
Positive
Negative
2.3
0.9
f
C
Cut-off Frequency
Z
SOURCE
=50
, Z
LOAD
=50
Channel R = 100
,
Channel C = 15pF
110
MHz
A
1GHz
Absolute Attenuation @ 1GHz from 0dB
Level
Z
SOURCE
= 50
, Z
LOAD
= 50
,
DC Bias = 0V; Notes 1, 4 and 5
35
dB
A
800MHz -
6GHz
Absolute Attenuation @ 800MHz to
6GHz from 0dB Level
Z
SOURCE
= 50
, Z
LOAD
= 50
,
DC Bias = 0V; Notes 1, 4 and 5
30
dB
2006 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
02/06/06
CM1431
Performance Information
Typical Filter Performance (T
A
=25C, DC Bias=0V, 50 Ohm Environment)
Figure 1. Insertion Loss vs. Frequency (FILTER1 Input to GND)
Figure 2. Insertion Loss vs. Frequency (FILTER2 Input to GND)
2006 California Micro Devices Corp. All rights reserved.
02/06/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
5
CM1431
Performance Information (cont'd)
Typical Filter Performance (T
A
=25C, DC Bias=0V, 50 Ohm Environment)
Figure 3. Insertion Loss vs. Frequency (FILTER3 Input to GND)
Figure 4. Insertion Loss vs. Frequency (FILTER4 Input to GND)
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