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PACUSBU-S

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

PACUSBU-S
PACUSBU-S

Overview
PACUSBU-S 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 ref...


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