Tool/software:
Hi
Could you help check the below TUSB501 schematic and any need to adjust
1. Please help confirm that usb3 is applicable, right?
2. The directivity of the component means that the signal tx is connected to the receiving end rx of the component, right?
3. DE\OS\EQ, what is the default pu\pd?
Hi Gareth,
1. Not sure what you mean here. The connectors do not look like any of the standard USB-A, B, or C connectors. What application is the customer going for?
2. The routing in your schematic looks correct with respect to the TUSB501Q1 devices. Each 501Q1 will pass the signal from the RX pins to the TX pins.
For example if you want the USB host SSTX to connect to the TUSB501Q1 RX pins, then the TUSB501Q1 TX pins should connect to the SSTX on the USB connector. This would be the TX signal path.
3. The pu/pd options you have in the schematic look ok. The actual best setting should be determined once your board is manufactured and validated. Having the option to solder/de-solder these resistors allows you to tune the settings appropriately.
4. The 17V clamp voltage on your ESD diodes is too high for our device. I recommend using a diode with a clamp voltage around 3V to 4.3V.
5. You need to AC couple the transmitters between the TUSB501Q1 and the USB connector with 0.1uF capacitors. Use 0201 as the footprint size for these.
Best,
Shane
Hi Shane
1. Not sure what you mean here. The connectors do not look like any of the standard USB-A, B, or C connectors. What application is the customer going for? =>This connector is for electric vehicle applications.
5. You need to AC couple the transmitters between the TUSB501Q1 and the USB connector with 0.1uF capacitors. Use 0201 as the footprint size for these.=> We have already placed a 0.1µF capacitor on the TUSB501 front end. Do we need to place one on the rear end as well?
Hi Gareth,
You need to AC couple the TUSB501 transmitters with 0.1uF capacitors on both the front end and back end. Right now I only see 0.1uF capacitors on two of the TUSB501 receivers which is not correct. Receivers should use 0.33uF capacitors when connecting to a cable:
If the 0.1uF receiver capacitors are the only capacitors between the TUSB501 and your host, then it is ok to keep them as 0.1uF. You can see how this is done in the datasheet of a similar device, the TUSB522P:
Best,
Shane
