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PACUSB-D1 Datasheet(PDF) 1 Page - California Micro Devices Corp |
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PACUSB-D1 Datasheet(HTML) 1 Page - California Micro Devices Corp |
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1 / 9 page  © 2004 California Micro Devices Corp. All rights reserved. 09/14/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 1 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 15k Ω 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 Ω, 22Ω, and 33Ω. This series resis- tance, plus the USB driver output resistance, must be close to the USB cable’s characteristic impedance of 45 Ω (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 GND 3 4 2 1 C1 C1 R1 R1 R2 R2 5 |
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