GD75232 IC fail issue

Kai Hsiao

Other Parts Discussed in Thread: GD75232

Dear Sir

We got some fail GD75232 IC from customer side

I saw the datasheet have sequence requirement in the old datasheet ,but in the latest datasheet ,there is no describe any timing delay for the sequence ,could you kindly help to confirm which timing sequence is right??

over 7 years ago

0 Ron Michallick over 7 years ago

TI__Guru*** 140126 points

Kai-san,

This note has been rewritten and moved to recommended operation table on page 4.

Do you have details about what failed?

0 Kai Hsiao over 7 years ago in reply to Ron Michallick

Guru 12675 points

Dear Ronald

Page 4 describe which power rail need to rise fist ,but there is no delay time value
I will check the fail detail with my end customer

Thanks

0 Kai Hsiao over 7 years ago in reply to Kai Hsiao

Guru 12675 points

Dear Roland

Below is the schematic

Fail status : use windows tool "Burn-in test" to verify ,the result is no response

The impedance have low impedance on Pin1 and Pin2

Could you kindly help to provide the suggestion??

Thanks

0 Ron Michallick over 7 years ago in reply to Kai Hsiao

TI__Guru*** 140126 points

Kai Hsiao,

Is the Ring Indicator line (pin 2) being used differently from the other RS-232 port lines?

0 Kai Hsiao over 7 years ago in reply to Ron Michallick

Guru 12675 points

Dear Roland

Sorry!!

I don't know what's "Ring Indicator line" mean

Could you explain more clearly ?

Thanks

0 Ron Michallick over 7 years ago in reply to Kai Hsiao

TI__Guru*** 140126 points

Kai-san,

This signal is called "RIA#1" which goes to pin 2 of GD75232. The signal indicates if the modem detects an incoming phone call.

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GD75232 IC fail issue