ECLAMP2357N Datasheet, PDF (1/7 Pages) Semtech Corporation – EMI Filter and ESD Protection for Secure Digital Card Interfaces

EClamp2357N
EMI Filter and ESD Protection
for Secure Digital Card Interfaces
PROTECTION PRODUCTS - EMIClamp^TM
PRELIMINARY
Description
The EClamp^TM2357N 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. They have been optimized for protection
of touch screen displays, secure digital (SD)
card interfaces, and color LCD panels in cellular
phones and other portable electronics.
The device consists of six pi filter 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 component capacitance value of 10pF
are used to achieve 20dB minimum attenuation from
1.0GHz to 3GHz. The device also includes 4 discrete
TVS diodes for dedicated ESD protection. All of 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.
Features
‹ EMI/RFI filter with integrated ESD protection
‹ ESD protection to IEC 61000-4-2 (ESD) Level4,
±15kV (air), ±8kV (contact)
‹ Filter performance: >30dB attenuation at 1.8GHz
‹ TVS working voltage: 5V
‹ Resistor: 100Ω +/− 15%
‹ Component Capacitance: 10pF (VR = 0V)
‹ EMI & ESD protection for six lines
‹ Dedicated ESD protection for four lines
‹ Solid-state technology
Mechanical Characteristics
‹ 16 pin QFN
‹ RoHS/WEEE Compliant
‹ Nominal Dimensions: 3.0 x 3.0 x 1.0 mm
‹ Lead Pitch: 0.5mm
‹ Lead Finish: Matte Tin
‹ Marking: Marking Code
‹ Packaging: Tape and Reel per EIA 481
Applications
‹ Touch Screen Display Interfaces
‹ Secure Digital (SD) Memory Card Interfaces
‹ Multimedia Card Interfaces (MCI)
‹ Color LCD Panel Protection
‹ Cell Phone Handsets and Accessories
PIN Configuration
Package Configuration
100 Ω
IN
OUT
10pF 10pF
GND
R = 100Ω, C=10pF (max) 6X
16
1
IN/OUT
IN/OUT
Revision 05/16/2005
GND
5V TVS 2X
16 Pin QFN (Top Side View)
Maximum Dimensions (in mm)
1
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