CM1423
Secure Digital (SD) Card EMI Filter Array with ESD Protection
Features
•
•
•
•
•
•
•
•
•
Provides EMI filtering and ESD protection for an
SD port on a mobile device
Six channels of EMI filtering with ESD protection
Four channels of ESD protection
±15kV
ESD protection on all I/O pins (IEC 61000-
4-2, contact discharge)
±30kV
ESD protection (HBM)
Better than 25dB of attenuation at 1GHz for 12pF-
100Ω -12pF filter configuration
Integrates 34 components into small form factor
CSP solution
20-bump, 4.000mm x 1.458mm footprint
Chip Scale Package
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
Available with OptiGuard
™
coated version for
improved reliability at assembly
Lead-free version available
Product Description
California Micro Devices's CM1423 is an EMI filter
array with ESD protection, which integrates six Pi- fil-
ters (C-R-C) and four channels of ESD protection. The
CM1423’s filters have component values of 12pF-
100Ω-12pF. The part includes ESD protection diodes
on every pin, which provide a very high level of protec-
tion for sensitive electronic components that may be
subjected to electrostatic discharge (ESD). All the
ESD diodes are designed and characterized to safely
dissipate ESD strikes of
±15kV,
beyond the maximum
requirement of the IEC 61000-4-2 international stan-
dard. Using the MIL-STD-883 (Method 3015) specifica-
tion 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 com-
puters) because of its small package format and easy-
to-use pin assignments. In particular, the CM1423 is
ideal for EMI filtering and protecting data lines from
ESD for the Secure Digital (SD) Card interface slot in
mobile handsets. The CM1423 is an all-inclusive solu-
tion for the SD card interface since its EMI filters pro-
vide the proper cut-off frequency to attenuate
unwanted signals.
The CM1423 is manufactured in a space-saving, low-
profile, chip-scale package, and is optionally available
with OptiGuard
™
coating for improved reliability. It is
also available with lead-free finishing.
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•
Applications
•
•
•
•
Secure Digital (SD) Card data lines in mobile
handsets
SD Card interface protection for other mobile elec-
tronics such as MP3 players, PDAs and digital
cameras
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
DAT 2
A1
12pF
100Ω
C1
12pF
DAT 2
CLK
A5
12pF
100Ω
C5
12pF
CLK
VSS1*
A4
C4
VDD*
DAT 3
A2
12pF
100Ω
C2
12pF
DAT 3
DAT 0
A7
12pF
100Ω
C7
12pF
DAT 0
ESD*
A6
C6
VSS2*
CMD
A3
12pF
100Ω
C3
12pF
CMD
DAT 1
A8
12pF
100Ω
C8
12pF
DAT 1
* In a typical SD Card application, A4 (A6)
is connected to C4 (C6). See example
given in applications section.
©
2005 California Micro Devices Corp. All rights reserved.
01/12/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
1
CM1423
PACKAGE / PINOUT DIAGRAMS
(Bumps Down View)
Orientation
Marking
(see note 2)
TOP VIEW
4
5
6
BOTTOM VIEW
(Bumps Up View)
VDD
CLK
VSS2
1
A
B
C
2
3
7
8
DAT2
DAT3
CMD
DAT0
DAT1
C1
GND
C2
B1
C3
GND
C4
B2
C5
GND
C6
B3
C7
GND
C8
B4
N231
Orientation
Marking
A1
A1
DAT2
A2
DAT3
A3
CMD
A4
VSS1
A5
CLK
A6
ESD
A7
DAT0
A8
DAT1
CM1423-01 Chip Scale Package (non-coated)
Orientation
Marking
(see note 2)
1
A
B
C
2
3
4
5
6
7
8
DAT2
DAT3
CMD
VDD
CLK
VSS2
DAT0
DAT1
C1
C2
GND
C3
GND
C4
B2
C5
GND
C6
B3
C7
GND
C8
B4
N233
Orientation
Marking
A1
A1
DAT2
B1
A2
DAT3
A3
CMD
A4
VSS1
A5
CLK
A6
ESD
A7
DAT0
A8
DAT1
CM1423-03 Chip Scale Package (OptiGuard
™
coated)
Notes:
1) These drawings are not to scale.
2) Lead-free devices are specified by using a "+" character for the top side orientation mark.
PIN DESCRIPTIONS
PIN(s)
A1
A2
A3
A4
A5
A6
A7
A8
B1-B4
NAME
DAT2
DAT3
CMD
VSS1
CLK
ESD
DAT0
DAT1
GND
DESCRIPTION
DATA2 Filter+ESD Channel, System Side
DATA3 Filter+ESD Channel, System Side
CMD Signal Filter+ESD Channel, System
Side
ESD-only Channel, Supply Voltage Ground
Clock Filter + ESD Channel
ESD-only Channel
DATA0 Filter+ ESD Channel, System Side
DATA1 Filter+ ESD Channel, System Side
Device Ground
PIN(s)
C1
C2
C3
C4
C5
C6
C7
C8
NAME
DAT2
DAT3
CMD
VDD
CLK
VSS2
DAT0
DAT1
DESCRIPTION
DATA2 Filter+ ESD Channel, SD Card Side
DATA3 Filter+ ESD Channel, SD Card Side
CMD Signal Filter+ESD Channel, SD Card Side
ESD-only Channel, Supply Voltage
Clock Filter + ESD Channel
Supply Voltage Ground
DATA0 Filter+ ESD Channel, SD Card Side
DATA1 Filter+ ESD Channel, SD Card Side
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
No Coating
Ordering Part
Bumps
20
PKG
CSP
Number
1
Lead-free Finish
2
No Coating
Ordering Part
Number
1
Optiguard
TM
Coated
Ordering Part
Number
1
Optiguard
TM
Coated
Ordering Part
Number
1
CM1423-03CP
Part
Marking
N233
Part
Marking
N231
Part
Marking
N233
Part
Marking
N231
CM1423-01CS
CM1423-03CS
CM1423-01CP
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
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
01/12/05
CM1423
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 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
Clamping Voltage during ESD Discharge
MIL-STD-883 (Method 3015), 8kV
Positive Transients
Negative Transients
Cut-off Frequency
Z
SOURCE
=50Ω, Z
LOAD
=50Ω
At 2.5V DC, 1MHz, 30mV
AC
I
DIODE
= 10µA
V
DIODE
= 3.3V
I
LOAD
= 10mA
I
LOAD
= -10mA
Notes 2,4 and 5
±30
±15
Notes 2,3,4 and 5
+12
-7
R = 100Ω, C = 12pF;
Note 5
145
V
V
MHz
kV
kV
5.6
-1.5
CONDITIONS
MIN
80
9
5.5
100
6.8
-0.8
9.0
-0.4
TYP
100
12
MAX
120
15
UNITS
Ω
pF
V
nA
V
V
V
ESD
V
CL
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: Clamping voltage is measured at the opposite side of the EMI filter to the ESD pin. For example, if ESD is applied to Pin A1,
then clamping voltage is measured at Pin C1.
Note 4: Unused pins are left open
Note 5: These parameters are guaranteed by design and characterization.
©
2005 California Micro Devices Corp. All rights reserved.
01/12/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
3
CM1423
Performance Information
Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment)
Figure 1. A1-C1 EMI Filter Performance
Figure 2. A2-C2 EMI Filter Performance
©
2005 California Micro Devices Corp. All rights reserved.
4
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
01/12/05
CM1423
Performance Information (cont’d)
Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment)
Figure 3. A3-C3 EMI Filter Performance
Figure 4. A5-C5 EMI Filter Performance
©
2005 California Micro Devices Corp. All rights reserved.
01/12/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
5
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