鈥?/div>
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
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 15k惟 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: 15惟, 22惟, and 33惟. This series resis-
tance, plus the USB driver output resistance, must be
close to the USB cable鈥檚 characteristic impedance of
45惟 (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.
Applications
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ESD protection and termination of USB
downstream ports
Desktop PCs
Notebooks
Set-top boxes
USB hubs
Electrical Schematic
1
C1
2
GND
C1
3
R1
R2
5
R2
R1
4
漏
2004 California Micro Devices Corp. All rights reserved.
09/14/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
鈻?/div>
Tel: 408.263.3214
鈻?/div>
Fax: 408.263.7846
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PACUSB-D3YB5相關(guān)型號PDF文件下載
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