器件名称: TUSB2040APT
功能描述: 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE
文件大小: 262.85KB 共17页
简 介:TUSB2040A 4-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS288B – FEBRUARY 1998 – REVISED MARCH 1998
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description
The TUSB2040A hub is a 3.3-V CMOS device that provides up to four downstream ports in compliance with the USB specification 1.0 version. Pin 21 (EXTMEM) enables or disables the EEPROM interface. When EXTMEM is low, the TUSB2040A is functionally equivalent to the TUSB2040 hub and the product ID (PID) displayed during enumeration is General Purpose USB Hub. For this configuration, pins 9 and 10 are the BUSPWR and GANGED input pins, respectively. If programmable vendor ID(VID) and product ID(PID) descriptors are desired, pin 21 must be high (EXTMEM = 1) and a SGS Thompson M93C46 or equivalent EEPROM must be connected to pins 9 and 10. For this configuration, the values for BUSPWR and GANGED are stored in the EEPROM and pins 9 and 10 become the EEPROM interface.
DP0 DM0 GND NC NC DP1 DM1 NC NC BUSPWR/SCL GANGED/SDA NC
1 2 3 4 5 6 7 8 9 10 11 12
48 47
46 45 44 43 42 41 40 39 38 37
OVRCUR1 PWRON1 OVRCUR2 NC PWRON2 NC NC V CC NC NC OVRCUR3 PWRON3
36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24
Universal Serial Bus (USB) Version 1.0 Compliant Integrated USB Transceivers Four Downstream Ports Two Power Source Modes – Self-Powered Mode – Bus-Powered Mode Power Switching and Overcurrent Reporting is Provided Ganged or Per Port All Downstream Ports Support Full-Speed and Low-Speed Operations……
