TSC2007: Lockup issue

Hi Brian,

Already using separate LDO (uncontrollable), waveforms are matching with given data, as HOST communicates, once the system power is stable

Still facing issue, Let me know if you can suggest solution for all remaining queries

Regards,

Amol

Can you elaborate on which waveform is being followed (figure 4 or figure 5)? If you do an additional POR after the system is stable does it start working? Any other details would be useful such as scope shots.

Hi Brian,

As i do not have any additional circuitry to reset the TSC in-between, after ensuring stable power, so suggestions given in SBAA161 is irrelevant to me

So, I have confirmed the proper valid POR sequence mentioned in document SLAA364 (Figure 4)

Le me know if you can give response to above queries as well, it will be really helpful for me to explore other possibilities as well...

Hi Amol

Rev. C of TSC2007 is the most resistant to the POR issues. Rev C was released in 2007, So unless you got your hands on some old stock it is likely you have the latest.

Unfortunately TSC2007 will need a proper POR to prevent this issue. As described in sbaa161, and slaa364

TSC2013 is not pin for pin, and still has strict requirements for POR, however this part has a reset pin as a workaround for the POR issue

Hi Arthur,

Can you please share the "device marking" identification document/ link, so it will be easier to identify the revision of device

& what about the TSC2003 response to same issue? does this device having more immunity?

Hi Amol,

I will see if I can find any documentation on the device markings.

Regarding TSC2003 resistance to this POR issue I think it has the same issue https://www.ti.com/lit/an/sbaa186/sbaa186.pdf?ts=1655446451537&ref_url=https%253A%252F%252Fwww.google.com%252F

Regards,
Arthur

Hi Arthur,

Any update on the same?

Amol,

I have followed up with our operations team on the top markings, but it's very unlikely you have devices from 2007.

Brian