PACUSB-D1 Datasheet, PDF (1/9 Pages) California Micro Devices Corp – USB Downstream Port Terminator

PACUSB-D1/D2/D3
USB Downstream Port Terminator
Features
• A low-capacitance USB downstream port termina-
tor, EMI filter, and transient over-voltage (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
Applications
• ESD protection and termination of USB
downstream ports
• Desktop PCs
• Notebooks
• Set-top boxes
• USB hubs
Product Description
The PACUSB-D1/D2/D3 is a single-channel USB
downstream-port termination network. It integrates
EMI/RFI filter components R1 and C1, as recom-
mended by the USB specification as well as the
required 15kΩ 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.
There are three options for the value of the series
resistor R1: 15Ω, 22Ω, and 33Ω. This series resis-
tance, plus the USB driver output resistance, must be
close to the USB cable’s characteristic impedance of
45Ω (each side) to minimize transmission line reflec-
tions.
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.
Electrical Schematic
R1
1
5
C1 ^R2
2
GND
C1 ^R2
3
4
R1
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: [phone] ▲ Fax: [phone] ▲ www.calmicro.com
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