0.5

0

0

1

2

1

1.5

3

4

0.8

3.6

0.2

1.3

2.5

0 V

Logic high

Logic low

8

TUSB2046B, TUSB2046BI

SLLS413K – FEBRUARY 2000 – REVISED JANUARY 2016

www.ti.com

Product Folder Links: TUSB2046B TUSB2046BI

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Copyright © 2000–2016, Texas Instruments Incorporated

Figure 2. Differential Driver Timing Waveforms

Figure 3. Single-Ended Receiver Input Signal Parameter Definitions

7.8 Typical Characteristics

Figure 4. Differential Receiver Input Sensitivity vs Common Mode Input Range

8 Detailed Description

8.1 Overview

The TUSB2046B is a 3.3-V CMOS hub device that provides one upstream port and four downstream ports in

compliance with the Universal Serial Bus (USB) specification as a full-speed hub. Because this device is

implemented with a digital state machine instead of a microcontroller, no firmware programming is required. Fully

compliant USB transceivers are integrated into the ASIC for all upstream and downstream ports. The

downstream ports support full-speed and low-speed devices by automatically setting the slew rate according to

the speed of the device attached to the ports. The configuration of the BUSPWR pin selects either the bus-

powered or the self-powered mode.