TUSB212: Eye pattern

Hi Malik-san,

Do you have any material/data which shows that how TUSB212 Vcc impacts the eye pattern when Vcc is less than 3V?

Regards,

Yamaguchi

Hi Malik-san,

Thank you for your support.

Customer is interested in the TUSB216 you recommended. Could you please advise me for the questions below?

1. Difference from TUSB212

Could you tell me the difference such as improvement or inferiority by comparing the performance (eye opening, jitter, etc.) between the two?

2. Compatibility with TUSB212

The package seems to be completely compatible, but when making a board pattern that can swap TUSB212 and TUSB216, are there any points to be careful about such as pin handling?

3. Temp range

The temperature range is 0 to 70 degC. Is there industrial grade option?

Regards,

Yamaguchi

Hi Yamaguchi,

1. TUSB216 has improved boosting cpabitly and added functionality to boost low amplutube signals allows TUSB216 to support longer cable lengths and different applications. I have tested an active cable application with two TUSB216 at either end of a 10m cable. In the same applciaiton tUSB212 would not be able to support a 10m cable. You can see any example TUSB216 eye diagram in the thread linked below. You can also compare eye diagrams from TUSB212 datasheet section 6.7 Typical Characteristics with eye diagrams from TUSB216 datasheet section 8.2.3 Application Curves. 

2. Schematic remains mostly the same assuming customer is not using TUSB216 CDP function. Pull-up/downs are different for configuring RX_SEN (TUSB216) vs DC_BOOST (TUSB212). If CDP function is not used leave CDP_ENZ unconnected (remove TUSB212 VREG cap). VCC range is a bit different but 3.3V is supported by TUSB216. 

3. Currently only commercial temp is available. 

Hi Malik-san,

Thank you so much for your support.

I received some additional questions from the customer. Could you please support the questions below?

4. Is the TUSB216 different from the TUSB212 in terms of the semiconductor process since the power supply voltage range is wider than that of the TUSB212?

5. For the 11pin, TUSB216 is CDP_ENZ-pin, TUSB212 is VREG-pin. Is there no internal LDO in the TUSB216? If so, is the performance of the redriver (AC/DC performance and jitter performance) degraded against the noise of the external power supply?

6. For the 6pin, TUSB216 is BOOST-pin. Is this same function as 9pin DC_BOOST of TUSB212?

7. For the 9pin, TUSB216 is RX_SEN. This function is not available on TUSB212. What has changed compared to the TUSB212 as a tuning feature for drive strength, reception sensitivity, etc.?

8. The operating temp range of TUSB216 is 0 to 70degC. How about operating at a low temperature of 0 degC or less? If the performance deteriorates, what kind of phenomenon can be considered? In terms of ability, customer would like it to operate up to about -20degC w/o guarantee.

9. The customer couldn’t find out USB HighSpeed redriver other than TI. On the other hand, competitors have SuperSpeed redriver. Is there any reason why HighSpeed is only made by TI?

10. Do you have a plan to develop Automotive grade for TUS216?

Regards,

Yamaguchi