The TUSB501-Q1 is a
3rd generation 3.3-V USB 3.0 single-channel redriver. When 5 Gbps
SuperSpeed USB signals travel across a PCB or cable, signal integrity degrades due to loss and
inter-symbol interference. The TUSB501-Q1 recovers incoming data by applying equalization that compensates
channel loss, and drives out signals with a high differential voltage. This extends the possible
channel length, and enables systems to pass USB 3.0 compliance. The TUSB501-Q1 advanced state machine
makes it transparent to hosts and devices.
After power up, the TUSB501-Q1 periodically performs receiver detection on the TX pair. If it
detects a SuperSpeed USB receiver, RX termination becomes enabled, and the TUSB501-Q1 is ready to redrive.
The receiver equalizer has three gain settings that are controlled by pin EQ: 3 dB, 6 dB,
and 9 dB. This should be set based on amount of loss before the TUSB501-Q1. Likewise, the output
driver supports configuration of De-Emphasis and Output Swing (pins DE and OS). These settings
allow the TUSB501-Q1 to be
flexibly placed in the SuperSpeed USB path, with optimal performance.
Over previous generations, the TUSB501-Q1 features reduced power in all link states, a stronger OS option,
improved receiver equalization settings, and an intelligent LFPS Controller. This controller senses
the low frequency signals and automatically disables driver de-emphasis, for full USB 3.0
The TUSB501-Q1 is
packaged in a small 2 x 2 mm QFN, and operates through an industrial temperature range of –40°C to
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