The TUSB2077APTR is a 7-port Full-Speed USB 2.0 Hub with optional serial EEPROM Interface. This device is implemented with a digital state machine instead of a microcontroller, no software 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 terminal selects either the bus-powered or self-powered mode. The introduction of the DP0 pull-up resistor disable terminal, DP0PUR, makes it much easier to implement an onboard bus/self-power dynamic-switching circuitry. The three-LED indicator control output pins also enable the implementation of visualized status monitoring of the hub and its downstream ports.
● Integrated USB transceiver
● 3.3V Low-power ASIC logic
● Two power source modes
● Self-powered mode supporting seven downstream ports
● Bus-powered mode supporting four downstream ports
● All downstream ports support full-speed and low-speed operations
● Power switching and overcurrent reporting is provided ganged or per port
● Supports suspend and resume operations
● Suspend status pin available for external logic Power Down
● Supports custom vendor ID and product ID With external serial EEPROM
● 3-state EEPROM interface allows EEPROM sharing
● Noise filtering on OVRCUR provides immunity to voltage spikes
● Supports 6MHz operation through a crystal input or a 48MHz input clock
● Green product and no Sb/Br
●Device has limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
