PROTECTION PRODUCTS
1www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS - EMIClampTM
EClamp3202A
ESD/EMI Protection
for Microphone Ports
Description
Revision 01/13/2006
Schematic & Pin Configuration
Dimensions
Features
The EClampTM3202A is a low pass filter array with
integrated TVS diodes for ESD protection. It is de-
signed to provide bidirectional filtering of EMI/RFI
signals and electrostatic discharge (ESD) protection in
portable electronic equipment. This state-of-the-art
device utilizes solid-state silicon-avalanche technology
for superior clamping performance and DC electrical
characteristics. They have been optimized for use on a
microphone port in cellular phones and other protable
electronics. The EClamp3202A effectively replaces 10
discrete components in a small SC-89 package to
provide ESD protection and EMI filtering. Each device
requires less than 2.9mm2 of PCB area with a low
profile of only 0.60mm. This small package will protect
and filter up to two lines. This small outline makes the
device especially well suited for portable applications.
The TVS diodes are bidirectional for supporting bipolar
audio signals without distortion. The TVS diodes provide
effective suppression of ESD voltages in excess of
±15kV (air discharge) and ±8kV (contact discharge) per
IEC 61000-4-2, level 4. The device has very low inser-
tion loss in the pass band and high attenuation at fre-
quencies ranging from 800MHz to 3GHz. Each line fea-
tures two stages of TVS diode protection. They feature
large cross-sectional area junctions for conducting high
transient currents. They offer desirable characteristics
for board level protection including fast response time,
low operating and clamping voltage, and no device deg-
radation.
Applications
Mechanical Characteristics
Cellular Handsets and Accessories
Cordless Phones
Personal Digital Assistants (PDAs)
Webpads & Handhelds
Notebook
Portable Instrumentation
MP3 Players
Transient protection for data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Bidirectional EMI/RFI filter with integrated ESD
protection
Protects two I/O lines
Ultra-small SC-89 package (1.7 x 1.7 x 0.6mm1.7 x 1.7 x 0.6mm
1.7 x 1.7 x 0.6mm1.7 x 1.7 x 0.6mm
1.7 x 1.7 x 0.6mm)
requires less than 2.9mm2 of PCB area
Working voltage: 5V
Low leakage current
Low operating and clamping voltages
Solid-state silicon-avalanche technology
SC-89 (SOT-666) package
Lead Finish: Matte Tin
Molding compound flammability rating: UL 94V-0
Marking : Marking Code
RoHS/WEEE Compliant
Packaging : Tape and Reel per EIA 481
0.60
1.70
1.701.25
0.30
0.50
2 2006 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
EClamp3202A
Absolute Maximum Rating
Electrical Characteristics (T=25oC)
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3 2006 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
EClamp3202A
Typical Characteristics
Typical Insertion loss Analog Crosstalk
ESD Clamping (+8kV Contact)
START
. 030 MHz 3
STOP 000
.
000 000 MHz
CH1 S21 LOG 20 dB/ REF 0 dB
ESD Clamping (-8kV Contact)
2
3
4
1
START
.
030 MHz 3
STOP 000
.
000 000 MHz
CH1 S21 LOG 6 dB / REF 0 dB
1: -5.4948 dB
39.8MHz
2: -20.390 dB
900 MHz
3: -14.199 dB
1.8 GHz
4: -11.011 dB
2.5 GHz
0 dB
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
-42 dB 1
GHz
100
MHz
3
GHz
10
MHz
1
MHz
Capacitance vs. Reverse Voltage
(Normalized to 0 volts)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
00.511.522.533.544.55
Reverse Voltage - VR (V)
CJ(VR) / CJ(VR=0))
f = 1 MHz
4 2006 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
EClamp3202A
LOW PASS FILTER
Layout Examples
Equivalent Circuit Diagram (Each Line)
Applications Information
Device Connection Options
The EClamp3202A provides EMI filtering and ESD
protection in a small SC-89 package for speaker port
applications. The equivalent circuit diagram is shown
below. The layout of the device is designed such that
the data lines can be routed through the device. The
first line pair enters at pins 1 and exits at pins 6. The
second line pair enters at pins 3 and exits at pins 4.
The device is symmetrical so the above connections
may be reversed. Layout examples are shown to the
right.
Option 1
Option 2
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
zPlace the TVS near the input terminals or connec-
tors to restrict transient coupling.
zMinimize the path length between the TVS and the
protected line.
zMinimize all conductive loops including power and
ground loops.
zThe ESD transient return path to ground should be
kept as short as possible.
zNever run critical signals near board edges.
zUse ground planes whenever possible.
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34
5
6
EClamp-
Audio
Codec
3202A
Micro-
phone
4
5
61
2
3
EClamp-
Audio
Codec
3202A
Micro-
phone
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5 2006 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
EClamp3202A
Outline Drawing - SC-89 (SOT-666)
Land Pattern - SC-89 (SOT-666)
NOTES:
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE ME
T
DIM
Y
Z
G
X
C
MILLIMETERSINCHES
(1.45)
.033
.090
.012
.024
(.057)
0.85
2.30
0.30
0.60
DIMENSIONS
Z
X
Y
CG
Y
P 0.50.020
P
c
L
1
A
Baaa C A-B D
D
e
Nxb
2
E/2
D
E1 E
N
C
A
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
NOTES:
OR GATE BURRS.
DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
2.
1.
L1
INCHES
.063
N
c
E1
E
L
D .059
.043
DIM
A
MIN
.019
1.70
1.25
1.50
1.10
6
-
.008
.063
.047
.067
.049
6
-
0.20
1.60
1.20
1.60
MILLIMETERS
MAX
0.60
MIN
DIMENSIONS
MAXNOM
-.024
NOM
0.50 -
1.701.55.061 .067
0.300.10.012.003
L1 .003 .006 0.150.10.008 0.20
b .005 --
0.15.012 0.30
e.020 BSC 0.50 BSC
0.180.10.007.003
aaa .004 0.10
6 2006 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
EClamp3202A
Marking Code Ordering Information
Note:
(1) Device is symmetrical so there is no pin 1 identifier.
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EClamp and EMIClamp are trademarks of Semtech Corporation
Tape and Reel Specification
Tape Specification and Device Orientation
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Contact Information for Semtech International AG
