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PACUSBU Datasheet, PDF (1/6 Pages) ON Semiconductor – Upstream USB Port Terminator | |||
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PACUSBU
Upstream USB Port
Terminator
Product Description
The PACUSBâU1, PACUSBâU2, and PACUSBâU3 are
singleâchannel USB upstreamâport termination networks.
The PACUSBâU1/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 1.5 kW
pullâup resistor to V3.3 (R2).
There are three options for the value of the series resistor R1:
ï· For PACUSBâU1, R1 = 15 W
ï· For PACUSBâU2, R1 = 33 W
ï· For PACUSBâU3, R1 = 22 W
This series resistance plus the USB driver output resistance must be
close to the USB cableâs characteristic impedance of 45 W (90 W
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 ï±15 kV safely, a level well
beyond the maximum requirements of the IEC 61000â4â2
international standard.
Using the MILâSTDâ883D (Method 3015) specification for Human
Body Model (HBM) ESD, all pins are protected for contact discharges
to greater than ï±30 kV.
The PACUSBâU1/U2/U3 is housed in either a 6âpin SC70 or 6âpin
SOT23 package and is available with optional leadâfree finishing.
Features
ï· One Upstream USB Port Terminator, EMI Filter and Transient
Overvoltage Protector in a Single SurfaceâMount Package
ï· Compact SC70 or SOT23 Package Saves Board Space and
Lowers Manufacturing Costs Compared to Discrete Solutions
ï· ESD Protection to ï±30 kV Contact Discharge per
MILâSTDâ883D, Method 3015
ï· ESD Protection to ï±15 kV Contact Discharge per IEC 61000â4â2
International Standard
ï· These Devices are PbâFree and are RoHS Compliant
Applications
ï· ESD Protection and Termination of USB Port
ï· All USB Peripherals (PC Printers, Scanners, Zip Drives, etc.)
ï· PDAs/Handheld PCs
ï· Digital Cameras
ï· Wireless Handsets
ï· MP3 Players
ï· Cable Modems
http://onsemi.com
SOT23â6
CASE 527AJ
SC70â6
CASE 419AD
ELECTRICAL SCHEMATIC
1
R1
D1_i
6
D1_c
C1
2
GND
R2
5
V3.3
3
D2_i
C1
R1
i = input; c = connector
4
D2_c
MARKING DIAGRAM
UxYR
UxR
UxYR
UxR
x
= Specific Device Code
= Specific Device Code
= 1, 2, 3
ORDERING INFORMATION
Device
Package
Shippingâ
PACUSBâU2Y6R SOT23â6 3000/Tape & Reel
(PbâFree)
PACUSBâU3Y6R SOT23â6 3000/Tape & Reel
(PbâFree)
PACUSBâU1R SC70â6 3000/Tape & Reel
(PbâFree)
PACUSBâU2R
PACUSBâU3R
SC70â6 3000/Tape & Reel
(PbâFree)
SC70â6 3000/Tape & Reel
(PbâFree)
â For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
ï£ Semiconductor Components Industries, LLC, 2011
1
October, 2011 â Rev. 3
Publication Order Number:
PACUSBU/D
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