Protection Design Guide for Portable Electronics - Semtech

PROTECTION PRODUCTS
Parallel Interface - EClamp ® 237xK RC Filter + ESD
Protection
The EClamp237xKseries is a RC filter consisting 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 10pF are used to
achieve 30dB minimum attenuation from 1.8GHz to
2.5GHz. 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.
These devices are available in 4-line (EClamp2384K),
6-line (EClamp2386K), and 8-line (EClamp2388K)
versions for maximum design flexibility. Each is in a
RoHS/WEEE compliant SLP package with a lead pitch of
0.400mm.
The EClamp2374K measures 1.7 x 1.3 x 0.5 mm.
The EClamp2376K measures 2.5 x 1.3 x 0.5 mm.
The EClamp2378K measures 3.3 x 1.3 x 0.5 mm.
Also, available is the EClamo237xP family in a slighlty
larger package size but offereing similar performnce
characteristics of the EClamp237xK parts.
Parallel Interface - EClamp ® 238xK RC Filter + ESD
Protection
The EClamp238xK series is a RC filter consisting of TVS
diodes for ESD protection, and a resistor - capacitor
network for EMI/RFI filtering. A series resistor value
of 200Ω and a capacitance value of 12pF are used to
achieve 30dB minimum attenuation from 800MHz to
2.7GHz. 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.
These devices are available in 4-line (EClamp2384K),
6-line (EClamp2386K), and 8-line (EClamp2388K)
versions for maximum design flexibility. Each is in a
RoHS/WEEE compliant SLP package with a lead pitch of
0.400mm.
The EClamp2384K measures 1.7 x 1.3 x 0.5 mm.
The EClamp2386K measures 2.5 x 1.3 x 0.5 mm.
The EClamp2388K measures 3.3 x 1.3 x 0.5 mm.
Also, available is the EClamo238xP family in a slighlty
larger package size but offereing similar performnce
characteristics of the EClamp238xK parts.
© 2009 Semtech Corp.
LCD Display - Serial & Parallel Interface
R-C Filters
8
SI08-01
Protection Design Guide
for Portable Electronics
100 Ω
IN OUT
EClamp237xK: R = 100 Ohms, C = 10pF
EClamp238xK: R = 200 Ohms, C = 12pF
RC Filter (Each Channel)
1 2
1.7 0
10pF 10pF
1.3 0
0.4 0 BSC
GND
4-Line 6-Line
1 2
0.5 0
3.30
0.40 BSC
8-Line
1 2
2.50
0.40 BSC
1.30
0.50
1.30
0.50
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