PROTECTION PRODUCTS
1
www.semtech.com
PROTECTION PRODUCTS - MicroClamp
TM
uClamp3301H
Low Voltage µClamp
TM
for ESD and CDE Protection
Description
Features
Dimensions Schematic & PIN Configuration
Revision 06/18/2004
The µClamp
TM
series of Transient Voltage Suppressors
(TVS) are designed to replace multilayer varistors
(MLVs) in portable applications such as cell phones,
notebook computers, and PDAs. They offer superior
electrical characteristics such as lower clamping
voltage and no device degradation when compared to
MLVs. They are designed to protect sensitive semicon-
ductor components from damage or upset due to
electrostatic discharge (ESD), lightning, electrical fast
transients (EFT), and cable discharge events (CDE).
The µclamp
TM
3301H is constructed using Semtech’s
proprietary EPD process technology. The EPD process
provides low standoff voltages with significant reduc-
tions in leakage currents and capacitance over silicon-
avalanche diode processes. They feature a true
operating voltage of 3.3 volts for superior protection
when compared to traditional pn junction devices.
The µclamp3301H is in a SOD-523 package and will
protect one unidirectional line. They give the designer
the flexibility to protect one line in applications where
arrays are not practical.
They may be used to meet the ESD immunity require-
ments of IEC 61000-4-2, Level 4 (15kV air, 8kV
contact discharge).
Applications
Mechanical Characteristics
Cellular Handsets & Accessories
Cordless Phones
Personal Digital Assistants (PDAs)
Notebooks & Handhelds
Portable Instrumentation
Digital Cameras
Peripherals
MP3 Players
Transient protection for data lines to
IEC 61000-4-2 (ESD) 20kV (air), 10kV (contact)
IEC 61000-4-4 (EFT) 40A (tp = 5/50ns)
Cable Discharge Event (CDE)
Ultra-small SOD-523 package (1.7 x 0.9 x 0.7mm)
Protects one I/O or power line
Low clamping voltage
Working voltage: 3.3V
Low leakage current
Solid-state silicon-avalanche technology
EIAJ SOD-523 package
Molding compound flammability rating: UL 94V-0
Marking : Marking code, cathode band
Packaging : Tape and Reel per EIA 481
Lead Finish: Matte tin
SOD-523 (Top View)
0.9
1.70
1.30
0.35
0.70
Maximum Dimensions (mm)
