Description

The Agere Systems Inc. USS-344 QuadraBus provides a single-chip four-host PCI-to-Universal Serial Bus (USB) solution. The USS-344 interfaces directly to any 32-bit, 33 MHz PCI bus and is ideal for either onboard applications or add-in card applications. It can easily be configured to communicate in either a 3 V PCI environment or 5 V PCI environment simply by selecting the appropriate communications voltage level on the VIO input pin.

Features

■ 32-bit, 33 MHz PCI interface compliant with PCI Local Bus Specification Revision 2.2

■ Four downstream USB ports

■ Each USB port dedicated to providing full USB bandwidth to the attached device

■ Full compliance with Universal Serial Bus Specification Revision 1.1

■ OpenHCI Open Host Controller Interface Specification for USB Release 1.0a compatible

■ Fully compatible with Microsoft Windows 98/95/Windows NT * standard OpenHCI drivers

■ Fully compatible with Mac† OS 8.5 and 8.6

■ Integrated dual-speed USB transceivers

■ 3 V or 5 V switchable PCI signaling

■ Low-power mode and wake-up compatible with PCI Power Management Interface Specification Revision 1.1

■ Supports up to 127 devices per port

■ Supports peripheral hot swap and wake-up

■ Support for legacy keyboard and mouse

■ 128-pin TQFP package

■ Full 12 Mbits/s bandwidth per port

■ Evaluation kit:

— PCI card

— Data sheet

■ 0.25 µm technology

Applications

■ Seamless integration with 3 V or 5 V PCI-based computer products

■ Supports all USB compliant devices and hubs

■ Simultaneous operation of multiple high-performance devices