W81C180

The W81C180 is a compound USB device with totally five downstream ports. It acts as a USB hub controller and a hub repeater at the direction of an external microcontroller. It is available in 32-pin PDIP package.

Here are some features about W81C180: (1)full compatible with USB spec Rev 1.0 and HID Class Definition Rev 1.0; (2)support multiple endpoints for standalone hub with attached function; (3)support USB device with emmbeded hub functionality; (4)USB function controller; (5)USB hub controller/repeater; (6)bus-powered/self-powered hub option; (7)four downstream ports with per port overcurrent protection; (8)two endpoints for attached device.

What comes next is about its absolute maximum ratings W81C180: (1)supply voltage: 5.5 V; (2)analog input voltage: VSS-0.5 V to VCC+0.5 V; (3)digital input voltage: VSS-0.5 V to VCC+0.5 V; (4)power dissipation: TBD; (5)ambient operating temperature: 0 to 70 ; (6)lead temperature(soldering 10 sec): 250 . Then is about its electrical characteristics(VCC=5 V±5%, Ta= 0 to 70 ): (1)logic input leakage current(Ta=70 ): 10 A; (2)serial interface frequency: 300 KHz; (3)single ended signal: 0.8 V min and 2.0 V max; (4)differential common mode range: 0.8 V min and 2.5 V max; (5)driver output low: 0.3 V min; (6)output signal crossover voltage: 1.3 V min and 2.0 V max.