ESD/EMI Protection
for Color LCD Interfaces
PROTECTION PRODUCTS - EMIClamp
TM
Description
The EClamp
TM
2342N is a low pass filter array with
integrated TVS diodes. It is designed to suppress
unwanted EMI/RFI signals and provide electrostatic
discharge (ESD) protection in portable electronic
equipment. This state-of-the-art device utilizes solid-
state silicon-avalanche technology for superior clamp-
ing performance and DC electrical characteristics.
They have been optimized for protection of color
LCD panels in cellular phones and other portable
electronics.
The device consists of eight identical circuits comprised
of TVS diodes for ESD protection, and a resistor -
capacitor network for EMI/RFI filtering. A series
resistor value of 100Ω and a capacitance value of
20pF are used to achieve 30dB minimum attenuation
from 1GHz to 2.5GHz. Each line features two stages of
TVS diode protection. The TVS diodes provide effec-
tive suppression of ESD voltages in excess of 15kV (air
discharge) and 8kV (contact discharge) per IEC 61000-
4-2, level 4.
The EClamp2342N is in a 16-pin, 0.5mm pitch QFN
package. It measures 3.0 x 3.0 x 1.0mm. The small
package makes it ideal for use in portable electronics
such as cell phones, digital still cameras, and PDA’s.
EClamp2342N
PRELIMINARY
Features
Bidirectional EMI/RFI filter with integrated TVS
for ESD protection
ESD protection to
IEC 61000-4-2 (ESD) Level4,
+/-15kV (air), +/-8kV (contact)
Filter performance: 30dB minimum attenuation
1GHz to 2.5GHz
TVS working voltage: 5V
Resistor: 100Ω
+/− 15%
Input Capacitance: 20pF (VR = 0V)
Protection and filtering for eight lines
Solid-state technology
Mechanical Characteristics
16 pin QFN
Nominal Dimensions: 3.0 x 3.0 x 1.0 mm
Lead Pitch: 0.5mm
Lead finish: Matte Tin
Marking : Marking Code + Date Code
Packaging : Tape and Reel per EIA 481
Applications
Color LCD Panel Protection
Cell Phone CCD Camera Lines
Clamshell Cell Phones
Personal Digital Assistants (PDA’s)
Circuit Diagram
Package Configuration
16
1
LOW PASS FILTER
R = 100Ω, C=20pF (max)
16 Pin QFN (Top Side View)
Maximum Dimensions (in mm)
1
www.semtech.com
Device Schematic (8X)
Revision 09/01/2004
SEMTECH [ SEMTECH CORPORATION ]
