Description
The ClampTM 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 are designed to protect sensitive
semiconductor components from damage or upset due
to electrostatic discharge (ESD), lightning, electrical
fast transients (EFT), and cable discharge events
(CDE).
The UClamp3301D is constructed using 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 UClamp3301D is in a SOD-323 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 requirements
of IEC 61000-4-2, Level 4 (±15kV air, ±8kV
contact discharge).

100 Watts peak pulse power (tp = 8/20μs)
Transient protection for data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (tp = 5/50ns)
IEC 61000-4-5 (Lightning) 10A (tp = 8/20μs)
Small package for use in portable electronics
Suitable replacement for MLVs in ESD protection
applications
Protects one line
Low clamping voltage
Working voltages: 3.3V
Low leakage current
Solid-state silicon-avalanche technology
Features

Applications
Cell Phone Handsets and Accessories
Laser Diode Protection
Notebooks, Desktops, & Servers
Portable Instrumentation
Analog Inputs