USB Downstream Port Terminator
PACUSB-D1/D2/D3
Features
Product Description
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A low-capacitance USB downstream port
terminator, EMI filter, and transient over-voltage
The PACUSB-D1/D2/D3 is a single-channel USB
downstream-port termination network. It integrates
EMI/RFI filter components R1 and C1, as
recommended by the USB specification as well as
the required 15kW pull-down resistors (R2) to GND.
In addition, PACUSB-D1/D2/D3 provides a very high
level of protection for sensitive electronic components
that may be subjected to electrostatic discharge
(ESD). The device pins will safely dissipate ESD
strikes of +15kV, exceeding the maximum
requirements of the IEC 61000-4-2 international
standard. Using the MIL-STD-883D (Method 3015)
specification for Human Body Model (HBM) ESD, all
pins are protected from contact discharges to +20kV.
(ESD) protector in a single surface-mounted
package
ESD protection to +20kV contact discharge, per
MIL-STD-883D, Method 3015
ESD protection to +15kV contact discharge, per
IEC 61000-4-2 International Standard
Compact SOT23-5 and SC70-5 package options
save board space and lower manufacturing costs
compared to discrete solutions
Capacitors matched to a precision exceeding the
USB specification
Pin-compatible with ST Microelectronics
USBDFxxW5 USB Downstream Port Terminator
Lead-free versions available
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There are three options for the value of the series
Applications
resistor R1: 15Ω, 22Ω, and 33Ω.
This series
resistance, plus the USB driver output resistance,
must be close to the USB cable’s characteristic
impedance of 45Ω (each side) to minimize
transmission line reflections.
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ESD protection and termination of USB
downstream ports
Desktop PCs
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Notebooks
Set-top boxes
USB hubs
The PACUSB-D1/D2/D3 is manufactured in a 5-pin
SC70 or a 5-pin SOT23 package and is available with
optional lead-free finishing..
©2010 SCILLC. All rights reserved.
June 2010 – Rev. 2
Publication Order Number:
PACUSB-D1/D2/D3/D