|Package | PIN:||LQFP (VF) | 32|
|Temp:||C (0 to 70)|
- Fully Compliant With the USB Specification as a Full-Speed Hub: TID #30220242
- Integrated USB Transceivers
- 3.3-V Low-Power ASIC Logic
- One Upstream Port and 2 or 3 Programmable Downstream Ports
- Total Number of Ports (2 or 3) Selected byInput Pin
- Total Number of Permanently Connected Ports Is Selected by 2 InputPins
- Two Power Source Modes
- Self-Powered Mode
- Bus-Powered Mode
- 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
- Push-Pull Outputs for PWRON Eliminate the Need for External Pullup Resistors
- Noise Filtering on OVRCUR Provides Immunity to Voltage Spikes
- Supports 6-MHz Operation Through a Crystal Input or a 48-MHz Input Clock
- Output Pin Available to Disable External Pullup Resister on DP0 for 3 ms After Reset or After Change on BUSPWR and Enable Easy Implementation of Onboard Bus/Self-Power Dynamic Switching Circuitry
- No Special Driver Requirements; Works Seamlessly With Any Operating System With USB Stack Support
- Available in 32-Pin HLQFP Package With a 0.8-mm Pin Pitch (JEDEC − S-PQFP-G For Low-Profile Quad Flat Pack)
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Texas Instruments TUSB2036VFRG4
The TUSB2036 hub is a 3.3-V CMOS device that provides up to three downstream ports incompliance with the USB 2.0 specification. Because this device is implemented with a digital statemachine instead of a microcontroller, no firmware programming is required. Fully-compliant USBtransceivers are integrated into the ASIC for all upstream and downstream ports. The downstreamports support both full-speed and low-speed devices by automatically setting the slew rateaccording to the speed of the device attached to the ports. The configuration of theBUSPWR pin selects either the bus-powered or the self-powered mode. Theintroduction of the DP0 pullup resistor disable pin, DP0PUR, makes it much easier to implement anonboard bus/self-power dynamic-switching circuitry. With the new function pin, the end-equipmentvendor can reduce the total board cost while adding additional product value.
The EXTMEM (pin 26) enables or disables the optional EEPROMinterface. When EXTMEM is high, the vendor and product IDs (VID and PID) usedefaults, such that the message displayed during enumeration is General Purpose USB Hub.
The TUSB2036 supports both bus-powered and self-powered modes. External power-managementdevices, such as the TPS2044, are required to control the 5-V power source switching (on/off) tothe downstream ports and to detect an overcurrent condition from the downstream ports individuallyor ganged.
An individually port power controlled hub switches power on or off to each downstreamport as requested by the USB host. Also when an individually port power controlled hub senses anover-current event, only power to the affected downstream port will be switched off. A ganged hubswitches on power to all its downstream ports when power is required to be on for any port. Thepower to the downstream ports is not switched off unless all ports are in a state that allows powerto be removed. Also when a ganged hub senses an over-current event, power to all downstream portswill be switched off.
The logic level of the MODE pin controls the selection of a crystal input to drive aninternal oscillator or an external clock source.