RClamp0524S is the First Dual Array TVS Device to Protect Data Lines
on Power Over Ethernet Circuits; Robust Circuit Protection for
Notebooks, VoIP Phones and Industrial PoE Applications
Semtech
Corp. (Nasdaq: SMTC), a leading supplier of analog and mixed-signal
semiconductors, today announced the RClamp0524S,
the first circuit
protection device with an advanced split-pad transient voltage
suppression (TVS) architecture designed to protect Power Over Ethernet
(POE) interfaces from electrical surges and transients.
The four-line RClamp0524S’ unique design incorporates two surge-rated,
low capacitance TVS
diode arrays to clamp fast rise-time transient voltage spikes to a
safe threshold. This RailClamp(R) platform device safeguards submicron
CMOS ICs from electrical surges including electrostatic discharge (ESD),
cable discharge events (CDE), electrical fast transients (EFT) and
residual lightning surges.
The TVS arrays present a 5V working voltage and offer low line-to-line
capacitance to preserve signal integrity on high-speed interfaces. As
PoE signal pairs reside at different DC potentials, Semtech’s novel
split-pad TVS architecture achieves the critical electrical isolation
needed between PoE differential pairs while also maintaining robust
surge immunity on individual line pair.
Packaged in a SOT-23 6L package, the RClamp0524S’ integrated diode
arrays feature an efficient flow-through layout, ideal for PCB trace
routing and mitigating parasitics in applications such as Wireless
Access Points, VoIP Telephony, and Digital Surveillance Cameras. The
RClamp0524S can be located on the PCB or inside the RJ-45 connector
where board space is limited. While offering designers the benefit of
significant board space savings, the RClamp0524S’ small size and ROHS &
WEEE compliance is consistent with Semtech’s initiative to be a leader
in enabling greener technologies.
“The PoE market is anticipating over 40% growth within the next three
years, driven by the need for remote powered applications. As new PoE
applications emerge, manufacturers will need to consider their
protection schemes to be PoE certified,” said Rick Hansen, Director of
Product Marketing for Protection Products at Semtech.
