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USB 3.1
ESD & Overcurrent Protection
Bourns® PortNote® solutions provide protection recommendations for typical port threats.
Alternate Recommendations
1 TVS Diode: CDSOD323-T05
2 4-Channel 3.3V TVS Diode Arrays:
CDDFN10-3324P
1 PPTC Resettable Fuse: MF-MSMF110-2
Benet
Model CDDFN10-0516P ultra-low
capacitance diodes with ultra-low inter-
channel capacitance minimize crosstalk
with up to 10 kV contact ESD protection
per IEC 61000-4-2 in one package for a
single solution.
e ultra-compact Model MF-NSMF200
package with low resistance minimizes
voltage drop at maximum current, and trip
current of 4 A ensures no inrush tripping.
Objective
Universal Serial Bus (USB) 3.1 ports at 10 Gbps are
twice as fast as USB 3.0 ports, enhancing consumer
applications requiring low latency high bandwidth.
The USB 3.1 standard section 6.1 recommends that
power and signal lines receive ESD protection, while
section 11.4.1.1 also requires that hosts and self-
powered hubs have time delayed overcurrent
protection such as Polymer PTC devices.
Solution
1 Multifuse® PPTC Resettable Fuse: MF-NSMF200-2
1 TVS Diode Array: CDDFN10-0516P
Compliance*
IEC 61000-4-2 Level 4
USB 3.1
UL 60950-1
To order samples, click on the
“Request Sample” button.
VBUS
D+ 1
2
3
4
5
6
7
8
9
10
Via hole to VDD
pin (pin2) of
CDDFN10-0516P
VDD
NC
NC
GND
D-
SSTX+
SSTX-
SSRX+
SSRX-
VDD
D+
D-
SSTX+
SSTX-
SSRX+
SSRX-
GND GND
MF-NSMF200-2
CDDFN10-0516P
Host
Controller
USB USB
Interface
*1.e Bourns® Model CDDFN10-0516P has been
tested according to the IEC 61000-4-2 standard
using the IEC 61000-4-2 ESD pulse waveform. e
device withstands up to 10 kV contact and 15kV
air discharge which meets and exceeds Level 4
requirements (8 kV contact , 15 kV air).
2. e Multifuse® device (MF-NSMF200-2) helps to
ensure the application’s compliance to
A. USB 3.1 (section 11.4.1.1.1) in that a
Polymer PTC device may be used for
overcurrent protection of the DC bus; and
B. UL 60950-1 Section 2.5 (Limited Power
Source Table 2B) in that any short circuit
current shall be limited to less than 8 A
within 5 seconds.
e TVS diode array (CDDFN10-0516P) provides
ESD and surge protection to the port. Customers
should evaluate the eects of the capacitance of the
TVS diode arrays on the quality of USB 3.1 data
ow in their specic circuits and applications.
e schematic shown here illustrates the application
protection and does not constitute the complete
circuit design. Customers should verify actual device
performance in their specic applications.
MF-NSMF200-2
CDDFN10-0516P
Solution Products
