Request for UP1909QND8 Chip

[rxyzm]

Hello,

I need help with UP1909QDN8 and UP1909PDN8 ICs.

The manufacturer is uPI Semiconductors Corp. There are datasheets available for some other ICs from uPI; but, I could not find datasheets for these 2 ICs.

Thank you.

Warm Regards,

[mon2]

Re: Request for UP1909QND8 Chip

Both are listed on AliExpress portal.

[Sephir0th]

Re: Request for UP1909QND8 Chip

For what do you need Datasheet, If you have Schematics?

[rxyzm]

Re: Request for UP1909QND8 Chip

Both are listed on AliExpress portal.

Aliexpress is a banned site in India now a days.

In the past (Till last year), I had ordered varied tools and material from Aliexpress. All was delivered to my home w/o any problem.

Warm Regards,

[rxyzm]

Re: Request for UP1909QND8 Chip

For what do you need Datasheet, If you have Schematics?

Hello Sephir0th,

The schematic will tell me how the chip is placed in the circuit.

Datasheet will help me understand how many different circuit (Function) configurations are there for this chip and why "This" (One in schematic) has been selected for this motherboard.

Warm Regards,

[SMDFlea]

Re: Request for UP1909QND8 Chip

There`s no datasheet available for both but there`s an overview,if it helps

https://www.upi-semi.com/en-article-upi-681-2157#
https://www.upi-semi.com/en-article-upi-681-2156#

[mon2]

Re: Request for UP1909QND8 Chip

Aliexpress is a banned site in India now a days.

In the past (Till last year), I had ordered varied tools and material from Aliexpress. All was delivered to my home w/o any problem.

Warm Regards,

I see and understand. Perhaps you can use a free web proxy to bypass the internet block? Unless the goods from China are also being blocked, you should be ok with this solution.

[rxyzm]

Re: Request for UP1909QND8 Chip

I see and understand. Perhaps you can use a free web proxy to bypass the internet block? Unless the goods from China are also being blocked, you should be ok with this solution.

Hello Mon2,

I am setting up TOR on my machine. So, may be in a day or 2 I will be able to see alixpress again.

Last I got to know from local post office, goods from China are inordinately delayed in delivery or not reaching destinations.

There are private shippers like FedEx or DHL etc. But, their rates are exorbitant and they dump multiple charges along with custom duties. I have seen the cases in the past where for a 1 $ part, FedEx was charging 15$ for shipping to India.

Warm Regards,

[rxyzm]

Re: Request for UP1909QND8 Chip

There`s no datasheet available for both but there`s an overview,if it helps

https://www.upi-semi.com/en-article-upi-681-2157#
https://www.upi-semi.com/en-article-upi-681-2156#

Hello SMDFlea,

Thank you so much for your valuable inputs.

At least it has solved one problem for me; it provided me the top view and pin configuration wrt top view. In schematic it showed a nine pin chip in circuit. On the board, I could see only 8 pins.

Checking the circuit would be a bit easy now.

Warm Regards,

[mon2]

Re: Request for UP1909QND8 Chip

According to the nice links shared by SMDFlea, the requested parts are not recommended for new designs (NRND).

The latest replacement is uP1965S. Datasheet is attached. This should also help to debug your current case with guidance on what is the purpose of each pin.

[rxyzm]

Re: Request for UP1909QND8 Chip

According to the nice links shared by SMDFlea, the requested parts are not recommended for new designs (NRND).

The latest replacement is uP1965S. Datasheet is attached. This should also help to debug your current case with guidance on what is the purpose of each pin.

Thank you Mon2.

Will go through the DS. May post any questions that I may have here.

Warm Regards,