TUSB211: Reliability question

Cedrick

Part Number: TUSB211

Hi,

Good day. I hope everything's fine over there.

Our customer were using the TUSB211. In their production test there will be an initial state when chips VCC, D1P, D1M, D2P, D2M pins are floating (VCC pin connected to GND pin via decoupling caps) and GND pin is connected to test system ground via 11k resistor.

After this initial state a 3V3 voltage will be applied in turns to D1P+D2P, D1M+D2M and GND pins.

They want to know if there is a risk that these above mentioned situations affect the reliability of the chip somehow?

Thank you and have a great day.

Regards,

Cedrick

over 3 years ago

0 Brian Zhou over 3 years ago

TI__Guru** 104900 points

DP/DM pin should be ok, why apply 3.3v to Gnd pin? for connection test?

0 Cedrick over 3 years ago in reply to Brian Zhou

TI__Expert 8270 points

Hi Brian,

Thank you for your support.

Yes, reason for applying voltage to GND pin of TUSB211 is to check the continuity of PCB’s (that TUSB211 is mounted to) ground net (traces+terminals).

Would this not affect the reliability of the chip?

Regards,

Cedrick

0 Brian Zhou over 3 years ago in reply to Cedrick

TI__Guru** 104900 points

if you just form voltage , it should be ok

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TUSB211: Reliability question