PROTECTION PRODUCTS
1
www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS - RailClamp
®®
®®
®
RClamp7538P
Low Capacitance RClamp
®
8-Line ESD protection
Description
Features
Dimensions Circuit Diagram
Revision 6/27/2013
Applications
Mechanical Characteristics
HDMI 1.4
V-By-One
MHL
LVDS Interfaces
eSATA Interfaces
ESD protection for high-speed data lines to
IEC 61000-4-2 (ESD) ±25kV (air), ±20kV (contact)
IEC 61000-4-5 (Lightning) 5A (8/20μs)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Package design optimized for high speed lines
Flow-Through design
Protects eight high-speed lines
Low capacitance: 0.60pF Maximum (I/O to Ground)
Low ESD clamping voltage
Low dynamic resistance: 0.42 Ohms (Typ)
Solid-state silicon-avalanche technology
SLP3810N9 9-pin package (3.8 x 1.0 x 0.50mm)
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Lead Pitch: 0.4mm (intra-pair), 0.50mm (pair-to-
pair)
Lead finish: NiPdAu
Marking: Marking Code
Packaging: Tape and Reel
8-Line ProtectionNominal Dimensions in mm (Bottom View)
124 5
3
6789
3.80
0.50
1.00
0.50 BSC
0.40 BSC
12
RailClamp
®
TVS arrays are ultra low capacitance ESD
protection devices designed to protect high speed data
interfaces. This series has been specifically engineered
to protect sensitive components which are connected
to high-speed data and transmission lines from over-
voltage caused by ESD (electrostatic discharge), CDE
(Cable Discharge Events), and EFT (electrical fast
transients).
The RClamp
®
7538P will protect eight lines or four
differential pairs. Each line has a maximum capaci-
tance of only 0.60pF between any I/O pin and ground.
This allows it to be used on circuits operating in excess
of 3GHz with minimal signal attenuation. They feature
high maximum ESD withstand voltage of +/- 20kV
contact, +/-25kV air discharge per IEC 61000-4-2.
The RClamp7538P is in a 9-pin SLP3810N9 package. It
measures 3.8 x 1.0mm with a nominal height of 0.50mm.
Intra-pair lead pitch is 0.40mm while the pair-to-pair pitch
is 0.5mm. The innovative flow through package design
simplifies pcb layout and allows matched trace lengths
for consistant impedance between high speed differen-
tial lines.
The combination of small size, low capacitance, and high
level of ESD protection makes this device a flexible solu-
tion for applications such as HDMI, MHL, LVDS, and eSATA
interfaces.
