The TUSB2036

The TUSB2036 hub is a 3.3-V CMOS device that provides up to three down stream ports in compliance with the USB version 1.1 specification.Because this device is implemented with a digital state machine instead of a microcontroller,no firmware programming is required.Fully complicant USB transceivers are intregrated into the ASIC for all upstream and downstream ports.The downstream ports support both full0speed and low-speed devices by automatically setting the slew rate acording to the speed of the device attached to the ports.The configuration of the terminal selects either the bus-powered or the self-powered mode.The introduction of the DP0 pull-up resistor disable pin,DP0PUR,makes it much easier to implement an on-board bus/self-power dynamic-switching circuitry.With the new function pin,the end equipment vendor can reduce the total board cost while adding additional product value.

Features of the TUSB2036 are:(1)universal serial bus(USB) version 1.1 compliant;(2)intregrated USB transceivers;(3)3.3-V low power ASIC logic;(4)one upstream port and 2-3 programmable downstream ports:total number of ports(2 or 3) selected by input pin,total number of permanently connected ports Is selected by 2 input pins;(5)two power spurce modes:self-powered mode,bus-powered mode;(6)all downstream ports support full-speed and low-speed operations;(7)power switching and overcurrent reporting is provide per port or ganged;;(8)supports suspend and resume operations;(9)suspend ststus terminal available for external logic power down;(10)supports custom vendor ID and product ID with external serial EEPROM;(11)3-state EEPROM interface allows EEPROM sharing;(12)push-pull outputs for wliminate rhe need for external pullup resistors;(13)noise filtering on provides immunity to voltage spikes and the last one is (14)support 6 MHz operation through crystal input or 48 MHz input clock.