MC141555P1 ,USB Hub Controller CMOSFeatures Highlight 6 237DM0 22PWRSW4Hub8 21 OVR4VDD3CAP• Self-contained Hub Includes Serial Interfa ..
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MC141555P1
USB Hub Controller CMOS
SEMICONDUCTOR TECHICAL DATAOrder this document
by MC141555Product Preview
USB Hub Controller
CMOSThis device is a self-contained USB Hub which complies with USB Hub
Specification Rev 1.0. This device is used to expand the USB ports of your PC
system while needed. Because of its self-contained and bus-powered/self-
powered capability, it can hide the complexity from the user and be flexibly
placed anywhere, such as monitor, keyboard, motherboard, Hub-box, etc. The
MC141555 consists of Serial Interface Engine (SIE), Hub Repeater, and Hub
Controller, supporting one upstream port and up to five downstream ports.
Both Low Speed Mode (1.5Mbps) and Full Speed Mode (12Mbps) are sup-
ported by automatically detecting which data line (D+ or D-) is pulled high
whenever downstream devices are connected to the bus or at power-up.
MC141555 Hub can be Self Powered or Bus Powered. When self-powered,
MC141555 is powered by an external 5 volt supply and capable of deliver
500mA current to each downstream port. Power management for all down-
stream ports supports power-switching and overcurrent detection with Individ-
ual or Ganged control; a self-powered MC141555 supports Individual control
only, but bus-powered MC141555 supports either Individual or Ganged control.
When Ganged control, PWRSW1 and OVR1 are dedicated for power manage-
ment.
Features Highlight
Hub Self-contained Hub Includes Serial Interface Engine (SIE), Hub Repeater
and Hub Controller Universal Serial Bus (USB) Version 1.0 Compliant Self-powered or Bus-powered Individual/Ganged Downstream Port Power Switching Individual/Ganged Downstream Port Overcurrent Detection All Downstream Ports Support Full Speed and Low Speed Operation Suspend and Resume Operations Host Reset Operation
General Characteristics 28 DIP Package Crystal Input 24MHz Internal 3.3Volt Regulator Single 5Volt Power Supply Low-power CMOS Technology
Freescale Semiconductor, Inc.
