CM1442
LCD and Camera EMI Filter Array with ESD Protection
Features
•
•
•
•
•
•
•
•
Six and eight channels of EMI filtering with inte-
grated ESD protection
0.4mm pitch, 15-bump, 2.360mm x 1.053mm foot-
print Chip Scale Package (CM1442-06)
0.4mm pitch, 20-bump, 3.160mm x 1.053mm foot-
print Chip Scale Package (CM1442-08)
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 30dB attenuation (typical) at 1 GHz
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
OptiGuard
™
coated for improved reliability at
assembly
Lead-free version available
Product Description
The CM1442 is a family of pi-style EMI filter arrays with
ESD protection, which integrates six and eight filters
(C-R-C) in Chip Scale Package form factor with
0.40mm pitch. The CM1442 has component values of
15pF-100Ω-15pF per channel. The CM1442 has a cut-
off frequency of 120MHz and can be used in applica-
tions where the data rates are as high as 48Mbps. The
parts include avalanche-type ESD diodes on every pin,
which provide a very high level of protection for sensi-
tive electronic components that may be subjected to
electrostatic discharge (ESD). The ESD protection
diodes safely dissipate ESD strikes of
±15kV,
well
beyond the maximum 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 dis-
charges 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 format and easy-
to-use pin assignments. In particular, the CM1442 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 CM1442 incorporates
OptiGuard
™
which results
in improved reliability at assembly. The CM1442 is
available in a space-saving, low-profile Chip Scale
Package with optional lead-free finishing. It is manu-
factured with a 0.40mm pitch and 0.25mm CSP solder
ball to provide up to 28% board space saving versus
competing CSP devices with 0.50mm pitch and
0.30mm CSP solder ball.
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Applications
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•
•
•
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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*
(Pins A1-An)
FILTER+ESDn*
(Pins C1-Cn)
15pF
15pF
GND
(Pins B1-Bm
where m = n/2)
* See Package/Pinout Diagram
for expanded pin information.
© 2005 California Micro Devices Corp. All rights reserved.
11/08/05
1 of 6 or 8 EMI/RFI + ESD Channels
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
1
CM1442
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
Note 1:
Note 2:
Note 3:
Note 4:
CONDITIONS
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, 3 and 4
MIN
80
24
12
TYP
100
30
15
6.0
0.1
MAX
120
36
18
UNITS
Ω
pF
pF
V
1
9.0
-0.4
μA
V
V
kV
kV
5.6
-1.5
±30
±15
6.8
-0.8
V
ESD
R
DYN
2.3
0.9
R=100Ω, C=15pF
115
Ω
Ω
MHz
f
C
T
A
=25
°
C unless otherwise specified.
ESD applied to input and output pins with respect to GND, one at a time.
Unused pins are left open
These parameters are guaranteed by design and characterization.
© 2005 California Micro Devices Corp. All rights reserved.
11/08/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
3
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