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PROTECTION PRODUCT BRIEF
ESD Protection To Safeguard
High-Speed USB 3.0 Data Lines
High-speed USB 3.0 data-line transceivers are vulnerable to frequent threats from ESD,
EFT and Cable Discharge events. USB 3.0 ICs require state of the art transient voltage
suppression (TVS) protection solutions that can both arrest dangerous fast rise-time
transient threats while also presenting suciently low junction capacitance to not
adversely impact signal integrity. Semtech has pioneered and led the way in transient
protection for high speed data lines, oering industry leading TVS technology to
safeguard the most sensitive USB 3.0 data lines.
ESD Solutions for
USB 3.0
RClamp
®
3346P
KEY FEATURES
• 3.3V working voltage
• Protects six lines
• ±17kV contact/±20kV air
• Dynamic resistance: 0.15Ω
• Low capacitance: 0.65pF I/O to I/O
• Flow-through package (2.7 x 0.8 x 0.50mm)
Alternative Solutions
RClamp
®
3324P
KEY FEATURES
• 3.3V working voltage
• Protects four lines
• ±17kV contact/±20kV air
• Dynamic resistance: 0.15Ω
• Low capacitance: 0.65pF I/O to I/O
• Flow-through package(2.5 x 1.0 x 0.60mm)
RClamp
®
3552T
KEY FEATURES
• 3.5V working voltage
• Protects two lines
• ±17kV contact/±20kV air
• Dynamic resistance: 0.3Ω
• Low capacitance: 0.4pF I/O to I/O
• Flow-through package (1.0 x 0.6 x 0.50mm)
USB 3.0 Protection with RClamp3346P
VBus
D+
D-
SSTX+
SSTX-
SSRX+
SSRX-
GND
GND
VBus
D+
D-
SSRX+
SSRX-
SSTX+
SSTX-
GND
GND
USB 3.0 - Type B
Device Connector
USB 3.0 - Type A
Device Connector
µClamp
®
0541Z
RClamp
®
3346P
µClamp
®
0541Z
RClamp
®
3346P
PROTECTION PRODUCTS | PRODUCT BRIEF
Semtech, the Semtech logo and RClamp are registered marks of Semtech Corporation. All other trademarks and trade names mentioned may be marks and names of their respective companies.
Semtech reserves the right to make changes to, or discontinue any products described in this document without further notice. Semtech makes no warranty, representation
or guarantee, express or implied, regarding the suitability of its products for any particular purpose. ©2017 Semtech Corporation. All rights reserved. USB3-PB
visit www.semtech.com for more
200 Flynn Road, Camarillo, California 93012
•
phone: (805) 498-2111
•
fax: (805) 498-3804
Device Parameter Summary (USB 3.0 Protection)
Part Number V
rvm
Lines
ESD Rating
Cap
(I/O - I/O)
Ipp @
8/20µs
Package size
(mm)
Schemetic Reference
Air Contact
RClamp3346P 3.3 6 ±20kV ±17kV 0.6pF 5A 2.7 x 0.8 x 0.5
13 45
2
67
RClamp3324P 3.3 4 ±20kV ±17kV 0.6pF 4.5A 2.5 x 1.0 x 0.6
3, 8
Pin 1 Pin 2 Pin 4 Pin 5
RClamp3552T 3.5 2 ±20kV ±17kV 0.3pF 4A 1.0 x 0.6 x 0.4
1
2
3
RClamp7524T 5 4 ±30kV ±25kV 0.5pF 5A 1.3 x 0.8 x 0.4
1
345
2
RClamp3521P 3.5 1 ±17kV ±12kV 0.33pF 4A 1.0 x 0.6 x 0.5
12
RClamp3331ZA 3.3 1 ±18kV ±18kV 0.35pF 4A 0.6 x 0.3 x 0.25
12
RClamp3361Z 3.3 1 ±15kV ±12kV 0.2pF 7A 0.62 x 0.32 x 0.3
12
RClamp
®
3346P ESD & TLP Clamping Response
-10
0
10
20
30
40
50
60
70
80
90
-10 0 10 20 30 40 50 60 70 80
Voltage (V)
Time (ns)
Measured with 50 Ohm scope input
impedance, 2GHz bandwidth. Corrected
for 50 Ohm, 20dB attenuator. ESD gun
return path connected to ESD ground
plane.
-5
0
5
10
15
20
25
30
0 2 4 6 8 10
TLP Current (A)
Clamping Voltage (V)
Transmission Line Pulse Test (TLP)
Settings:
t
p
=100ns, t
r
=0.2ns,
I
TLP
and V
TLP
averaging window:
t
1
=70ns to t
2
=90ns
ESD Clamping (+8kV Contact per IEC 61000-4-2)
Between any I/O and Ground
TLP Characteristic (Positive)