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
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-100Ω-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.
•
•
•
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
Electrical Schematic
100Ω
FILTER+ESDn*
15pF
FILTER+ESDn*
R
15pF
C
GND
C
* See Package/Pinout Diagram
for expanded pin information.
1 of 4, 6 or 8 EMI/RFI + ESD Channels
© 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
PACKAGE / PINOUT DIAGRAMS
(Pins Down View)
8 7 6 5
TOP VIEW
BOTTOM VIEW
(Pins Up View)
1 2 3 4
(Pins Down View)
12 11 10 9 8 7
TOP VIEW
BOTTOM VIEW
(Pins Up View)
1 2 3 4 5 6
Pin 1
Marking
XX
1 2 3 4
GND
PAD
Pin 1
Marking
XXXX
1 2 3 4 5
6
GND
PAD
8 7 6 5
12 11 10 9 8 7
CM1431-04DF/DE
8 Lead TDFN Package
TOP VIEW
(Pins Down View)
CM1431-06DF/DE
12 Lead TDFN Package
BOTTOM VIEW
(Pins Up View)
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
Pin 1
Marking
XXXXX
1 2 3 4 5
6 7
8
GND
PAD
16 15 14 13 12 11 10 9
Notes:
1) These drawings are not to scale.
CM1431-08DF/DE
16 Lead TDFN Package
PIN DESCRIPTIONS
DEVICE PIN(s)
-04
1
2
3
4
-06
1
2
3
4
5
6
-08
1
2
3
4
5
6
7
8
GND PAD
NAME
FILTER1
FILTER2
FILTER3
FILTER4
FILTER5
FILTER6
FILTER7
FILTER8
GND
DESCRIPTION
Filter + ESD Channel 1
Filter + ESD Channel 2
Filter + ESD Channel 3
Filter + ESD Channel 4
Filter + ESD Channel 5
Filter + ESD Channel 6
Filter + ESD Channel 7
Filter + ESD Channel 8
Device Ground
DEVICE PIN(s)
-04
8
7
6
5
-06
12
11
10
9
8
7
-08
16
15
14
13
12
11
10
9
NAME
FILTER1
FILTER2
FILTER3
FILTER4
FILTER5
FILTER6
FILTER7
FILTER8
DESCRIPTION
Filter + ESD Channel 1
Filter + ESD Channel 2
Filter + ESD Channel 3
Filter + ESD Channel 4
Filter + ESD Channel 5
Filter + ESD Channel 6
Filter + ESD Channel 7
Filter + ESD Channel 8
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Pins
8
12
16
Package
TDFN-8
TDFN-12
TDFN-16
Ordering Part
Number
1
CM1431-04DF
CM1431-06DF
CM1431-08DF
Part Marking
WF
N31F
N318F
Lead-free Finish
Ordering Part
Number
1
CM1431-04DE
CM1431-06DE
CM1431-08DE
Part Marking
WE
N31E
N318E
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
© 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
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
DC Power per Resistor
DC Package Power Rating
RATING
-65 to +150
100
500
UNITS
°C
mW
mW
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
RATING
-40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE1)
SYMBOL
R
C
TOTAL
C
V
DIODE
I
LEAK
V
SIG
PARAMETER
Resistance
Total Channel Capacitance
Capacitance C
Standoff Voltage
Diode Leakage Current (reverse bias)
Signal Clamp Voltage
Positive Clamp
Negative Clamp
In-system ESD Withstand Voltage
a) Human Body Model, MIL-STD-883,
Method 3015
b) Contact Discharge per IEC 61000-4-
2 Level 4
Dynamic Resistance
Positive
Negative
Cut-off Frequency
Z
SOURCE
=50Ω, Z
LOAD
=50Ω
Absolute Attenuation @ 1GHz from 0dB
Level
6GHz from 0dB Level
Channel R = 100Ω,
Channel C = 15pF
Z
SOURCE
= 50Ω, Z
LOAD
= 50Ω,
DC Bias = 0V; Notes 1, 4 and 5
Z
SOURCE
= 50Ω, Z
LOAD
= 50Ω,
DC Bias = 0V; Notes 1, 4 and 5
At 2.5VDC Reverse Bias, 1MHz,
30mVAC
At 2.5VDC Reverse Bias, 1MHz,
30mVAC
I
DIODE
=10μA
V
DIODE
=
+
3.3V
I
LOAD
= 10mA
I
LOAD
= -10mA
Notes 2 and 3
±30
±15
kV
kV
5.6
-1.5
CONDITIONS
MIN
80
24
12
TYP
100
30
15
6.0
0.1
6.8
-0.8
1.0
9.0
-0.4
MAX
120
36
18
UNITS
Ω
pF
pF
V
μA
V
V
V
ESD
R
DYN
2.3
0.9
110
35
30
Ω
Ω
MHz
dB
dB
f
C
A
1GHz
A
800MHz -
Absolute Attenuation @ 800MHz to
6GHz
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
T
A
=25
°
C unless otherwise specified.
ESD applied to input and output pins with respect to GND, one at a time.
These parameters are guaranteed by design and characterization.
Attenuation / RF curves characterized by a network analyzer using microprobes.
These parameters are NOT guaranteed by design, characterization and production.
© 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
Performance Information
Typical Filter Performance (T
A
=25°C, 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.
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 (cont’d)
Typical Filter Performance (T
A
=25°C, 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)
© 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
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