PACUSB-U2R datasheet(1/7 Pages) CALMIRCO

Part #	PACUSB-U2R

Description	Upstream USB Port Terminator

PDF	7 Pages

Scroll/Zoom	100%

Manufacturer	CALMIRCO [California Micro Devices Corp]

Direct Link	http://www.calmicro.com

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1 / 7 page

05/01/06

490 N. McCarthy Blvd., Milpitas, CA 95035-5112

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Tel: 408.263.3214

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Fax: 408.263.7846

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www.cmd.com

1

PACUSB-U1/U2/U3

Upstream USB Port Terminator

Features

•

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

Applications

•

ESD protection and termination of USB port

•

All USB peripherals (PC printers, scanners,

zip drives, etc.)

•

PDAs / handheld PCs

•

Digital cameras

•

Wireless Handets

•

MP3 Players

•

Cable Modems

Product Description

The PACUSB-U1, PACUSB-U2, and PACUSB-U3 are

single-channel USB upstream-port termination net-

works.

The PACUSB-U1/U2/U3 integrate EMI/RFI filter com-

ponents R1 and C1, as recommended by the USB

specification. Because these are upstream USB

devices, they are terminated with a single 1.5k

Ωpull-up

resistor to V3.3 (R2).

There are three options for the value of the series

resistor R1:

•

For PACUSB-U1, R1=15

Ω

•

For PACUSB-U2, R1=33

Ω

•

For PACUSB-U3, R1=22

Ω

This series resistance plus the USB driver output resis-

tance must be close to the USB cable’s characteristic

impedance of 45

Ω (90Ω balanced) to minimize trans-

mission line reflections.

In addition, these parts provide a very high level of pro-

tection for sensitive electronic components that may be

subjected to electrostatic discharge (ESD). The input

and output pins are designed and characterized to dis-

sipate ESD strikes of

±15kV safely, a level well beyond

the maximum requirements of the IEC 61000-4-2 inter-

national standard.

Using the MIL-STD-883D (Method 3015) specification

for Human Body Model (HBM) ESD, all pins are pro-

tected 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.

Vcc

SC70 6

R1

GND

IN1

OUT 1

OUT 2

IN2

1

2

3

C1

R1

R2

6

5

4

D1_c

V3.3

D2_c

GND

D1_i

D2_i

Electrical Schematic

i = input

c = connector

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PACUSB-U2R Datasheet(PDF) 1 Page - California Micro Devices Corp

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