UCLAMP2804L Datasheet, PDF (1/8 Pages) Semtech Corporation – Lightning and ESD Protection for Gigabit Ethernet Interfaces

PROTECTION PRODUCTS _{- MicroClamp}^®
Description
The μClamp^®2804L TVS diode is specifically designed
to meet the performance requirements of Gigabit
Ethernet interfaces. They are designed to protect
sensitive PHY chips from damage or upset due to
electrostatic discharge (ESD), lightning, electrical fast
transients (EFT), and cable discharge events (CDE).
The μClamp2804L is constructed using Semtech’s low
voltage EPD process technology. The EPD process
provides low operating voltages with significant reduc-
tions in leakage current and capacitance over silicon-
avalanche diode processes. The device features low
variation in capacitance over bias for stable operation
on GbE lines. This means the μClamp2804L will
introduce zero traffic frame errors on GbE interfaces
up to a PHY temperature of 100^oC (100M Cat 5/5e
Cable). The μClamp2804L also features high surge
capability and can be used to replace existing SLVU2.8-
4 devices in applications where the device is placed on
the PHY side of the magnetics. In this configuration,
the device can withstand intra-building lightning surges
per Telcordia GR-1089.
The μClamp2804L is in a 8-pin SOIC package. The
leads are finished with lead-free matte tin. The combi-
nation of low clamping voltage, high surge capability,
and low loading capacitance makes the uClamp2804L
an ideal solution for protecting GbE systems to the
lightning immunity requirements of GR-1089.
uClamp2804L
Lightning and ESD Protection
for Gigabit Ethernet Interfaces
Features
‹ High ESD withstand Voltage: +/-30kV (Contact/Air)
per IEC 61000-4-2
‹ Able to withstand over 1000 ESD strikes per IEC
61000-4-2 Level 4
‹ Flow-through design simplifies layout
‹ Protects two line pairs
‹ Low reverse current: 10nA typical (VR=2.8V)
‹ Low variation in capacitance vs. bias voltage:
1.3pF Typical (VR = 0 to 2.8V)
‹ Working voltage: 2.8V
‹ Solid-state silicon-avalanche technology
Mechanical Characteristics
‹ JEDEC SO-8 package
‹ Pb-Free, Halogen Free, RoHS/WEEE Compliant
‹ Lead Finish: Matte tin
‹ Molding compound flammability rating: UL 94V-0
‹ Marking : Marking code, date code
‹ Packaging : Tape and Reel
Applications
‹ 10/100/1000 Ethernet
‹ Integrated magnetics/RJ-45 connectors
‹ LAN/WAN Equipment
‹ Security Cameras
‹ Industrial Controls
‹ Notebooks & Desktop Computers
Functional Circuit Diagram
Package Configuration
1.27
Revision 7/19/2011
12
4.00 6.00
5.00
1.75
SO-8 (Max Dimensions in mm)
1
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