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PACUSBU

ON Semiconductor
Part Number PACUSBU
Manufacturer ON Semiconductor
Description Upstream USB Port Terminator
Published Feb 4, 2016
Detailed Description PACUSBU Upstream USB Port Terminator Product Description The PACUSB−U1, PACUSB−U2, and PACUSB−U3 are single−channel USB ...
Datasheet PDF File PACUSBU PDF File

PACUSBU
PACUSBU

Overview
PACUSBU Upstream USB Port Terminator Product Description 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.
5 kW pull−up resistor to V3.
3 (R2).
There are three options for the value of the series resistor R1:  For PACUSB−U1, R1 = 15 W  For PACUSB−U2, R1 = 33 W  For PACUSB−U3, R1 = 22 W This series resistance plus the USB driver output resistance must be close to the USB cable’s 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 15 kV safely, a level well beyond the maximum req...


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