California Micro Devices -- PACUSB-U3 Product Information


PACUSB-U1/U2/U3

Upstream USB Port Terminator

PRODUCT DESCRIPTION

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EOL NOTICE

Some or all of this product family has been identified as an End-of-Life product.

Products Affected:
PACUSB-U3
More Info

The PACUSB-U1, PACUSB-U2, and PACUSB-U3 are single-channel USB upstream-port termination networks.

The PACUSB-U1/U2/U3 integrate EMI/RFI filter components R1 and C1, as recommended by the USB specification. Because these are upstream USB devices, they are terminated with a single 1.5kΩ pull-up resistor to V3.3 (R2).

There are three options for the value of the series resistor R1:

For PACUSB-U1, R1=15Ω
For PACUSB-U2, R1=33Ω
For PACUSB-U3, R1=22Ω

This series resistance plus the USB driver output resistance must be close to the USB cable's characteristic impedance of 45Ω (90Ω balanced) to minimize transmission line reflections.

In addition, these parts provide a very high level of protection for sensitive electronic components that may be subjected to electrostatic discharge (ESD). The input and output pins are designed and characterized to dissipate ESD strikes of ±15kV safely, a level well beyond 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 for contact discharges to greater than ±30kV.

The PACUSB-U1/U2/U3 is housed in either a 6-pin SC70 or 6-pin SOT23 package and is available with optional lead-free finishing.

Note: Some of the devices listed here have suggested replacements available. Please see additional information at the end of this page.

FEATURES

APPLICATIONS

One upstream USB port terminator, EMI filter and transient overvoltage protector in a single surface-mount package
Compact SC70 or SOT23 package saves board space and lowers manufacturing costs compared to discrete solutions
ESD protection to ±30kV contact discharge per MIL-STD-883D, method 3015
ESD protection to ±15kV contact discharge per IEC 61000-4-2 international standard
Lead-free version available

ESD protection and termination of USB port
All USB peripherals (PC printers, scanners, zip drives, etc.)
PDAs / handheld PCs
Digital cameras
Wireless andets
MP3 players
Cable modems

DATA SHEET(S)

	Part Number		Datasheet
	PACUSB-U3, PACUSB-U3R, PACUSB-U3Y6R		Data Sheet (PDF - 119.32 KB) Last Revision Date: 2006-05-01

PACKAGING, FINISHING & STATUS INFORMATION

Part Number	Package	Lead-Free Finishing	Status
PACUSB-U3R	SC70-6		Active
PACUSB-U3Y6R	SOT23-6		Active
PACUSB-U3	SC70-6		End of Life

PRODUCT REPLACEMENT INFORMATION

The following End-of-life or Obsolete products have suggested replacements available from CMD.
Part Number	Replacement
PACUSB-U3	PACUSB-U3R

Status Key

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