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RCLAMP0854P.TCT Datasheet(PDF) 7 Page - Semtech Corporation

Part # RCLAMP0854P.TCT
Description  RailClamp짰 Low Capacitance TVS Array
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

RCLAMP0854P.TCT Datasheet(HTML) 7 Page - Semtech Corporation

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© 2008 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
RClamp0854P
Applications Information
Figure 2 - USB OTG Protection
Figure 2 - USB OTG Protection
Figure 2 - USB OTG Protection
Figure 2 - USB OTG Protection
Figure 2 - USB OTG Protection
Figure 1- Pin Configuration & Circuit Diagram
Device Connection Options for Protecting One USB
Port
USB Data and ID lines are connected at pins 1, 2, and
3. These inputs are referenced to an internal 5 volt
TVS protection device. When the voltage on these
lines exceed 5 volts, the TVS will conduct. Pin 6 is
connected to the USB voltage bus (VBus). This device
will conduct when the voltage on the bus exceeds 5.5
volts. The center tab is connected to ground. The
path length should also be kept as short as possible to
minimize parasitic inductance. For best results,
multiple micro-vias are recommended to the ground
plane.
Protecting USB Interfaces
The RClamp0854P is optimized for use on systems
that utilize the USB interface for battery charging. Low
capacitance protection is provided for the USB data
(DM, DP) and USB ID pins. The maximum capacitance
on these lines is <1pF for maximum signal integrity.
All three lines are referenced to an internal 5 volt TVS
device. A separate 5.5 volt TVS device is used for
protection of the USB voltage bus. This allows battery
charging without signal clipping. A typical example is
shown in Figure 2.
VBus
Mini USB
DM
USB ID
GND
1
Gnd
1
2
3
4
5
DP
12
3
GND
6
5.5V
5.5V


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