TUSB1310A: 8b/10b Decode Errors association for VDDA1P1 and VDD1P1

Yuta Nishie

Part Number: TUSB1310A

Hi,

The customer evaluation revealed that 8b/10b Decode Errors occurred when VDDA1P1 and VDD1P1=1.07 V to 1.09 V.

The recommended operating range for VDDA1P1 and VDD1P1 is 1.045 V to 1.155 V (Typ =1.1 V), but do you know what causes errors when the input voltage is below the Typ value?

Do you know the internal circuits involved in VDDA1P1 and VDD1P1?

Best Regards,

Nishie

over 2 years ago

0 Brian Zhou over 2 years ago

TI__Guru*** 145355 points

Nishie:

Is the voltage measured at device pin? More likely internal PLL not stable when VDD1P1 drop.

Best

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4955 points

Hi Brian-san,

Brian Zhou said:
Is the voltage measured at device pin?

->Yes.

Brian Zhou said:
More likely internal PLL not stable when VDD1P1 drop.

->Can the internal PLL become unstable while operating at VDD1P1=1.07V?
Are factors other than the internal PLL unlikely?

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 145355 points

Nishie:

not sure any other factors related since PLL is known issue for this device.

Regards

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4955 points

Hi Brian-san,

Is there any official documentation for the PLL Issue?

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 145355 points

here is the errata for this device.

Best

Brian

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TUSB1310A: 8b/10b Decode Errors association for VDDA1P1 and VDD1P1