CM1437
4 and 8 Channel EMI Filter Arrays with ESD Protection
Features
•
•
•
•
•
•
•
Four and eight channels of EMI filtering with ESD
protection
Greater than 25dB of attenuation from 800MHz
to 3GHz
±15kV
ESD protection (IEC 61000-4-2, contact
discharge)
±30kV
ESD protection (MIL-STD-883, Method
3015, HBM)
Fabricated with
Centurion™
advanced low capaci-
tance zener process technology
Space saving, low profile 8- and 16-lead 0.4mm
pitch TDFN packages
Lead-free version available
Product Description
California Micro Devices’ CM1437 is an EMI filter array
with ESD protection, which integrates either four or
eight pi filters (C-R-C). The CM1437 has component
values of 7.5pF-200
Ω
-7.5pF (f
C
= 210MHz). The parts
include ESD protection diodes on every pin, providing
a very high level of protection for sensitive electronic
components that may be subjected to electrostatic dis-
charge (ESD). The ESD diodes connected to the filter
ports safely dissipate ESD strikes of
±15kV
contact dis-
charge, twice the specification requirement of the IEC
61000-4-2, Level 4 international standard. Using the
MIL-STD-883 (Method 3015) specification for Human
Body Model (HBM) ESD, the pins are protected for
contact discharges at greater than
±30kV.
This device is particularly well-suited for portable elec-
tronics (e.g. mobile handsets, PDAs, notebook comput-
ers) because of its small package and easy-to-use pin
assignments. In particular, the CM1437 is ideal for EMI
filtering and protecting data lines from ESD in wireless
handsets.
The CM1437 is available in space-saving, low-profile,
0.4mm pitch, 8- and 16-lead TDFN packages. It is fab-
ricated with California Micro Devices’
Centurion
™
pro-
cess and available with optional lead-free finishing.
Applications
•
•
•
I/O port protection for mobile handsets, notebook
computers, PDAs, etc.
EMI filtering for data ports in cell phones, PDAs, or
notebook computers
EMI filtering for LCD, camera and chip-to-chip data
lines
Electrical Schematic
200Ω
FILTERn*
7.5pF
C
GND
R
C
7.5pF
FILTERn*
1 of 4/8 EMI Filtering + ESD Channels
* See Package/Pinout Diagram for expanded pin information.
© 2006 California Micro Devices Corp. All rights reserved.
11/13/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
1
CM1437
PACKAGE / PINOUT DIAGRAMS
(Pins Down View)
8
7
6
5
TOP VIEW
BOTTOM VIEW
(Pins Up View)
1
2
3
4
CM1437-04DE/DF
8-Lead TDFN Package
Pin 1
Marking
1
7x
8
GND PAD
7
6
5
2
3
4
9
1
2
3
4
5
6
7
8
16 15 14 13 12 11 10
CM1437-08DE/DF
16-Lead TDFN Package
without Exposed End Pads
Pin 1
Marking
1
2
N378x
3
4
5
6
7
8
GND PAD
16 15 14 13 12 11 10
9
Notes:
1) These drawings are not to scale.
2) See Ordering Information section below for device specific marking.
PIN DESCRIPTIONS
Pins
CM1437 CM1437
-04Dx
-08Dx
1
2
3
4
1
2
3
4
5
6
7
8
GND Pad
NAME
FILTER1
FILTER2
FILTER3
FILTER4
FILTER5
FILTER6
FILTER7
FILTER8
GND
DESCRIPTION
Filter Channel 1
Filter Channel 2
Filter Channel 3
Filter Channel 4
Filter Channel 5
Filter Channel 6
Filter Channel 7
Filter Channel 8
Device Ground
Pins
CM1437 CM1437
-04Dx
-08Dx
8
7
6
5
16
15
14
13
12
11
10
9
NAME
FILTER1
FILTER2
FILTER3
FILTER4
FILTER5
FILTER6
FILTER7
FILTER8
DESCRIPTION
Filter Channel 1
Filter Channel 2
Filter Channel 3
Filter Channel 4
Filter Channel 5
Filter Channel 6
Filter Channel 7
Filter Channel 8
Ordering Information
PART NUMBERING INFORMATION
Leads/
Pins
8
16
Standard Finish
Package
TDFN-08
TDFN-16
Ordering Part Number
1
CM1437-04DF
CM1437-08DF
Part Marking
7F
N378F
Lead-free Finish
Ordering Part Number
1
CM1437-04DE
CM1437-08DE
Part Marking
7E
N378E
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
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
11/13/06
CM1437
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
DC Power Rating per Resistor
Package DC Power Rating
RATING
–65 to +150
100
300
UNITS
°C
mW
mW
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
RATING
–40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
R
C
V
DIODE
I
LEAK
V
SIG
PARAMETER
Resistance
Capacitance
Diode Standoff Voltage
Diode Leakage Current (reverse bias)
Signal 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
At 2.5V DC, 1MHz, 30mV
AC
I
DIODE
= 10μA
V
DIODE
= 3.3V
I
LOAD
= 10mA
I
LOAD
= –10mA
See notes 2 and 3
±30
±15
kV
kV
5.6
–0.4
CONDITIONS
MIN
160
6
TYP
200
7.5
6.0
0.1
6.8
–0.8
1
MAX
240
9
UNITS
Ω
pF
V
μA
V
V
V
ESD
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.
© 2006 California Micro Devices Corp. All rights reserved.
11/13/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
3
CM1437
Performance Information
Typical Filter Performance
(nominal conditions unless specified otherwise, 0V DC Bias, 50 Ohm Environment).
Figure 1. Channel 1 EMI Filter Performance (CM1437-04)
Figure 2. Channel 2 EMI Filter Performance (CM1437-04)
© 2006 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
11/13/06
CM1437
Performance Information (cont’d)
Typical Filter Performance
(nominal conditions unless specified otherwise, 0V DC Bias, 50 Ohm Environment)
Figure 3. Channel 3 EMI Filter Performance (CM1437-04)
Figure 4. Channel 4 EMI Filter Performance (CM1437-04)
© 2006 California Micro Devices Corp. All rights reserved.
11/13/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
5
Analogue and Mixed Signal
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