USB2641I-HZH-02 Standard Microsystems (SMSC), USB2641I-HZH-02 Datasheet - Page 3

• Manufacturer Part Number: USB2641I-HZH-02
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2641I-HZH-02

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Industrial Temperature USB 2.0 Flash Media Controller and Hub Combo
Overview
SMSC USB2640i/USB2641i
The SMSC USB2640i/USB2641i is an integrated USB 2.0 compliant, Hi-Speed hub for USB port
expansion with an attached bulk only mass storage class peripheral controller. This multi-format flash
media controller and USB Hub Combo features three downstream ports: one port is dedicated to an
internally connected ultra fast flash media reader/writer and two exposed downstream ports are
available for external peripheral expansion.
The SMSC USB2640i/USB2641i is an ultra fast, OEM-configurable, hub controller IC with three
downstream ports for embedded USB solutions. The USB2640i/USB2641i will attach to an upstream
port as a Full-Speed Hub or as a Full-/Hi-Speed Hub. The hub supports Low-Speed, Full-Speed, and
Hi-Speed (if operating as a Hi-Speed Hub) downstream devices on all of the enabled downstream
ports.
All required resistors on the USB ports are integrated into the hub. This includes all series termination
resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The
over-current sense inputs for the downstream facing ports have internal pull-up resistors.
The USB2640i/USB2641i includes programmable features such as:
PortMap which provides flexible port mapping and disable sequences. The downstream ports of a
USB2640i/USB2641i hub can be reordered or disabled in any sequence to support multiple platform
designs with minimum effort. For any port that is disabled, the USB2640i/USB2641i automatically
reorders the remaining ports to match the USB host controller’s port numbering scheme.
PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows
direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the
USB differential signals on the PCB.
PHYBoost which enables four programmable levels of USB signal drive strength in downstream port
transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system
level variables such as poor PCB layout, long cables, etc.
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Revision 2.1 (06-29-09)