CM1424
MultiMedia Card EMI Filter Array with ESD Protection
Features
•
•
•
•
•
•
•
•
•
•
Three channels of EMI filtering, each with ESD
protection
Two channels of ESD protection
Flow-through routing for MMC interface
±
15kV ESD protection (IEC 61000-4-2, contact
discharge)
±
30kV ESD protection (HBM)
Greater than 30dB of attenuation at 1GHz
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
10-bump, 1.998mm x 1.458mm footprint Chip
Scale Package (CSP)
Available with
OptiGuard
™
coating for improved
reliability
Lead-free version available
Product Description
The CM1424 is an EMI filter array integrating 3 pi-filters
(C-R-C) and 2 channels of ESD protection. The
CM1424 has component values of 12pF - 100
Ω
- 12pF.
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 diodes con-
nected to the filter ports safely dissipate ESD strikes of
±
15kV, 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
discharges at greater than
±
30kV.
The ESD diodes on pins A2 and C2 safely dissipate
ESD strikes of
±
15kV, well beyond the maximum
requirement of the IEC 61000-4-2 international stan-
dard.
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 CM1424 is ideal for EMI
filtering and protecting data lines from ESD for the Mul-
tiMedia Card (MMC) slot in mobile handsets.
The CM1424 devices are optionally available with
Opti-
Guard
™
coating which results in improved reliability.
The CM1424 is available in space-saving, low-profile,
chip-scale packages with optional lead-free finishing.
Applications
•
•
•
MultiMedia Card (MMC) slot in mobile handsets
and other handheld devices such as digital cam-
eras and MP3 players
I/O port protection for mobile handsets, notebook
computers, PDAs etc.
EMI filtering for data ports in cell phones, PDAs or
notebook computers
Electrical Schematic
EMI Filter + ESD Channel 1
CMD A1
100
Ω
C1 CMD
ESD Channel 1
A2
ESD Channel 2
C2
12pF
12pF
EMI Filter + ESD Channel 2
CLK
A3
100
Ω
C3
CLK
DAT0
A4
EMI Filter + ESD Channel 3
100
Ω
C4
DAT0
12pF
12pF
©
2005 California Micro Devices Corp. All rights reserved.
09/16/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
12pF
12pF
▲
www.cmd.com
1
CM1424
PACKAGE / PINOUT DIAGRAMS
(Bumps Down View)
1
2
3
4
A
B
C
TOP VIEW
BOTTOM VIEW
(Bumps Up View)
EMI+ESD3 EMI+ESD2
ESD1
A4
A3
B2
GND
A2
GND
A1
EMI+ESD1
N241
C4
B1
C1
EMI+ESD1
C3
EMI+ESD2
C2
ESD2
EMI+ESD3
CM1424 CSP Package (Uncoated)
(Bumps Down View)
Orientation
Marking
(see note 2)
TOP VIEW
2
3
4
BOTTOM VIEW
(Bumps Up View)
EMI+ESD3 EMI+ESD2
ESD1
1
A
B
C
A4
A3
B2
GND
A2
GND
A1
EMI+ESD1
N243
C4
B1
C1
EMI+ESD1
C3
EMI+ESD2
C2
ESD2
EMI+ESD3
Notes:
1) These drawings are not to scale.
2) Lead-free devices are specified by using a "+" character for the top side orientation mark.
CM1424 CSP Package (OptiGuard
™
coated)
PIN DESCRIPTIONS
PIN(s)
A1
A2
A3
A4
B1-B2
NAME
EMI+ESD1
ESD1
EMI+ESD2
EMI+ESD3
GND
DESCRIPTION
CMD Filter Channel 1
ESD Channel 1
CLK Filter Channel 2
DAT0 Filter Channel 3
Device Ground
PIN(s)
C1
C2
C3
C4
NAME
EMI+ESD1
ESD2
EMI+ESD2
EMI+ESD3
DESCRIPTION
CMD Filter Channel 1
ESD Channel 2
CLK Filter Channel 2
DAT0 Filter Channel 3
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
No Coating
Ordering Part
Bumps
10
PKG
CSP
Number
1
Lead-free Finish
2
No Coating
Ordering Part
Number
1
OptiGuard
™
Coated
Ordering Part
Number
1
Part
Marking
N241
Part
Marking
N243
Part
Marking
N241
Ordering Part
Number
1
CM1424-03CP
CM1424-01CS
CM1424-03CS
CM1424-01CP
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Note 2: Lead-free devices are specified by using a "
+
" character for the top side orientation mark.
©
2005 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
A1
Orientation
Marking
(see note 2)
Orientation
Marking
Orientation
Marking
A1
OptiGuard
™
Coated
Part
Marking
N243
09/16/05
CM1424
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
DC Power per Resistor
DC Package 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
1
SYMBOL
R
C
V
DIODE
I
LEAK
V
SIG
PARAMETER
Resistance
Capacitance
Diode 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
Channel R=100Ω,
Channel C=12pF
At 2.5V DC, 1MHz, 30mV
AC
I
DIODE
= 10μA
V
DIODE
= +3.3V
I
LOAD
= 10mA
5.6
-1.5
±30
±15
CONDITIONS
MIN
80
9
TYP
100
12
6.0
100
6.8
-0.8
300
9.0
-0.4
MAX
120
15
UNITS
Ω
pF
V
nA
V
V
kV
kV
V
ESD
Notes 2 and 3
R
DYN
1.6
0.4
157
Ω
Ω
MHz
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.
©
2005 California Micro Devices Corp. All rights reserved.
09/16/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.cmd.com
3
CM1424
Performance Information (cont’d)
Typical Filter Performance (T
A
=25°C, DC Bias=0V, 50 Ohm Environment)
Figure 3. Insertion Loss VS. Frequency (A4-C4 to GND B2)
Figure 4. Filter Capacitance vs. Input Voltage over Temperature
(normalized to capacitance at 2.5VDC and 25°C)
©
2005 California Micro Devices Corp. All rights reserved.
09/16/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.cmd.com
5
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