CM1440
6 Channel EMI Filter Array with ESD Protection
Features
•
•
•
•
•
•
•
Six channels of EMI filtering for data ports
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
±30kV
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
15-bump, 0.4mm pitch, 2.360mm x 1.053mm foot-
print Chip Scale Package (CSP)
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
OptiGuard
™
coated for improved reliability at
assembly
RoHS compliant (lead-free) finishing
Product Description
The CM1440 is a six channel low-pass EMI filter array
with ESD protection that reduces EMI/RFI emissions
while providing robust protection from ESD strikes.
Each EMI filter channel integrates a high quality pi-
style filter (30pF-100Ω-30pF) which provides greater
than 30dB of attenuation in the 800MHz to 2.7GHz fre-
quency range. The parts include avalanche-type 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 connected to the filter ports
safely dissipate ESD strikes of
±30kV,
beyond the max-
imum requirement of the IEC61000-4-2 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. wireless handsets, PDAs, notebook com-
puters) because of its small package and easy-to-use
pin assignments. In particular, the CM1440 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 CM1440 incorporates
OptiGuard
™
which results
in improved reliability at assembly. The CM1440 is
available in a space saving, low profile Chip Scale
Package with RoHS compliant lead-free finishing. It is
manufactured with a 0.40mm pitch and 0.25mm CSP
solder ball to provide up to 28% board space savings
versus competing CSP devices with 0.50mm pitch and
0.30mm CSP solder ball.
•
•
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
FILTERn*
(Pins A1-A6)
FILTERn*
(Pins C1-C6)
30pF
30pF
GND
(Pins B1-B3)
* See Package/Pinout Diagram
for expanded pin information.
1 of 6 EMI/RFI + ESD Channels
© 2008 California Micro Devices Corp. All rights reserved.
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
Issue B – 04/30/08
●
Fax: 408.263.7846
●
www.cmd.com
1
CM1440
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 C1
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
R=100Ω C=30pF
,
60
MHz
At 2.5VDC Reverse
Bias, 1MHz, 30mVAC
At 2.5VDC Reverse
Bias, 1MHz, 30mVAC
I
DIODE
=10μA
V
DIODE
=
+
3.3V
I
LOAD
= 10mA
5.6
-1.5
Notes 2 and 3
±30
±30
2.3
0.9
kV
kV
Ω
Ω
6.8
-0.8
9.0
-0.4
V
V
CONDITIONS
MIN
80
48
24
TYP
100
60
30
6.0
0.1
1
MAX
120
72
36
UNITS
Ω
pF
pF
V
μA
V
ESD
R
DYN
f
C
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.
© 2008 California Micro Devices Corp. All rights reserved.
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
Issue B – 04/30/08
●
Fax: 408.263.7846
●
www.cmd.com
3
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