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The TUSB2046A is a 3.3-V CMOS hub device that provides one upstream port and four downstream ports in compliance with the 1.1 Universal Serial Bus (USB) specification. 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 both 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.
TUSB2046A Maximum Ratings
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . 0.5 V to 3.6 V Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Input clamp current, IIK, (VI < 0 V or VI > VCC) . . . . . . . . . . .. . . . . . . . . ±20 mA Output clamp current, IOK, (VO < 0 V or VO > VCC) . . . . . . . . . . . . . . . . ±20 mA Storage temperature range, Tstg . . . . . . . . . . . . . . . . .. . . . . . . . 65 to 150 Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . 0 to 70 † Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage levels are with respect to GND.
TUSB2046A Features
` Universal Serial Bus (USB) Version 1.1 Compliant ` 32-Pin LQFP† Package With a 0.8 mm Pin Pitch ` 3.3-V Low Power ASIC Logic ` Integrated USB Transceivers ` State Machine Implementation Requires No Firmware Programming ` One Upstream Port and Four Downstream Ports ` All Downstream Ports Support Full-Speed and Low-Speed Operations ` Two Power Source Modes Self-Powered Mode Bus-Powered Mode ` Power Switching and Over-current Reporting is Provided Ganged or Per Port ` Supports Suspend and Resume Operations ` Supports Programmable Vendor ID and Product ID With External Serial EEPROM ` 3-State EEPROM Interface Allows EEPROM Sharing ` Push-Pull Outputs for PWRON Eliminate the Need for External Pullup Resistors ` Noise Filtering on OVRCUR Provides Immunity to Voltage Spikes ` Package Pinout Allows 2-Layer PCB ` Low EMI Emission Achieved by a 6-MHz Crystal Input ` Migrated From Proven TUSB2040 Hub ` Lower Cost Than the TUSB2040 Hub ` Enhanced System ESD Performance
TUSB2046A Connection Diagram
TUSB2046B General Description
The TUSB2046B is a 3.3-V CMOS hub device that provides one upstream port and four downstream ports in compliance with the 1.1 Universal Serial Bus (USB) specification. 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 both 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 the self-powered mode.
TUSB2046B Maximum Ratings
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . −0.5 V to 3.6 V Input voltage range, VI . . . . . . . . . . . . . . .. . . . .. . . . . . . . −0.5 V to VCC + 0.5 V Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V Input clamp current, IIK, (VI < 0 V or VI > VCC) . . . . . . . . . . .. . . . . . . . . . ±20 mA Output clamp current, IOK, (VO < 0 V or VO > VCC) . . . . . . . . . . . . . . . . . ±20 mA Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150 Operating free-air temperature range, TA, TUSB2046B . . . . . . . . . . . . . 0to 70 TUSB2046BI . . . . . . . . . . −40to 85 † Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage levels are with respect to GND.
TUSB2046B Features
· Universal Serial Bus (USB) Version 1.1 Compliant · 32-Terminal LQFP† Package With a 0.8-mm Terminal Pitch · 3.3-V Low Power ASIC Logic · Integrated USB Transceivers · State Machine Implementation Requires No Firmware Programming · One Upstream Port and Four Downstream Ports · All Downstream Ports Support Full-Speed and Low-Speed Operations · Two Power Source Modes− Self-Powered Mode− Bus-Powered Mode · Power Switching and Overcurrent Reporting Is Provided Ganged or Per Port · Supports Suspend and Resume Operations · Supports Programmable Vendor ID and Product ID With External Serial EEPROM · 3-State EEPROM Interface Allows EEPROM Sharing · Push-Pull Outputs for PWRON Eliminate the Need for External Pullup Resistors · Noise Filtering on OVRCUR Provides Immunity to Voltage Spikes · Package Pinout Allows 2-Layer PCB · Low EMI Emission Achieved by a 6-MHz Crystal Input · Migrated From Proven TUSB2040 Hub · Lower Cost Than the TUSB2040 Hub · Enhanced System ESD Performance · Supports 6-MHz Operation Through a Crystal Input or a 48-MHz Input Clock