• Re: HS8831 USB-Hub IC: Searching for data sheet

    From Mike Monett@21:1/5 to All on Fri Jul 22 17:55:34 2022
    Reinhard Zwirner <reinhard.zwirner@t-online.de> wrote:

    <https://www.bilder-hochladen.net/files/big/12b4-14s-cb32.jpg

    Interesting problem. I had no luck either, in Octopart or a general web
    search.

    The ic has a very funny pinout. 3 grounds on one side, 1 on the other.
    Fairly modern design with smd's and a led.

    You might describe the function of the device and the supply voltages.

    Almost looks like a USB driver on the right. Ground, what looks like power,
    and two data lines.

    What are the functions of each of the three cables on the left, and one on
    the right?

    Looks like a very sloppy soldering job. May be a small-time shop. Is there
    ny way to contact the manufacturer or the distributor?

    There's lots of experts in the group. Someone may be able to find it.

    Good Luck



    --
    MRM

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  • From Reinhard Zwirner@21:1/5 to All on Fri Jul 22 19:17:32 2022
    Dear experts,

    Unfortunately, I'm not able to find the datasheet for the mentioned
    IC (be it being too stupid for using the right search terms, be it
    the data sheet can't actually be found in the Web).

    <https://www.bilder-hochladen.net/files/big/12b4-14s-cb32.jpg>

    Therefore I do hope that somebody here is smarter or more successful
    than me ...

    Many thanks in advance.

    Best regards

    Reinhard

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  • From Don@21:1/5 to Reinhard Zwirner on Fri Jul 22 18:19:06 2022
    Reinhard Zwirner wrote:
    Dear experts,

    Unfortunately, I'm not able to find the datasheet for the mentioned
    IC (be it being too stupid for using the right search terms, be it
    the data sheet can't actually be found in the Web).

    <https://www.bilder-hochladen.net/files/big/12b4-14s-cb32.jpg>

    Therefore I do hope that somebody here is smarter or more successful
    than me ...

    Many thanks in advance.

    It's not a lack of intelligence on your part - don't let the antisocial/psychopathic/sociopaths wear you down with their "you have
    no one to blame but yourself" bullshift.

    Anyhow, see if you can get any mileage out of the datasheet shown
    towards the bottom of this webpage:

    https://translated.turbopages.org/proxy_u/ru-en.en.29debb41-62dae7de-21571e48-74722d776562/https/translated.turbopages.org/proxy_u/ru-en.en.cfc21c95-62dae795-d0503c61-74722d776562/https/aliexpress.ru/item/32856126726.html

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

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  • From Lasse Langwadt Christensen@21:1/5 to All on Fri Jul 22 11:24:50 2022
    fredag den 22. juli 2022 kl. 19.17.40 UTC+2 skrev Reinhard Zwirner:
    Dear experts,

    Unfortunately, I'm not able to find the datasheet for the mentioned
    IC (be it being too stupid for using the right search terms, be it
    the data sheet can't actually be found in the Web).

    <https://www.bilder-hochladen.net/files/big/12b4-14s-cb32.jpg>

    Therefore I do hope that somebody here is smarter or more successful
    than me ...

    Many thanks in advance.

    Best regards

    Reinhard

    no datasheet but pinout ,schematic, and some info

    https://www.912688.com/supply/304750527.html https://martyworkshopdiary.blogspot.com/2018/04/usb-20-hub.html

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  • From Reinhard Zwirner@21:1/5 to Mike Monett on Sat Jul 23 01:05:06 2022
    Mike Monett schrieb:
    Reinhard Zwirner <reinhard.zwirner@t-online.de> wrote:

    <https://www.bilder-hochladen.net/files/big/12b4-14s-cb32.jpg

    [snip]
    You might describe the function of the device and the supply voltages.

    It is a special 2-port (lower 2 cables on the PCB's left side) USB
    hub for use with a small tablet, which is connected with the cable on
    the right side of the PCB. Additionally, the USB devices connected to
    the 2 ports can be supplied (5 V) either from the tablet or - to save
    the tablet's battery energy - from an extra power supply connected
    via the cable soldered to the GND/V5 pads on the upper left side of
    the PCB .

    Almost looks like a USB driver on the right. Ground, what looks like power, and two data lines.

    What are the functions of each of the three cables on the left, and one on the right?

    See above.

    Looks like a very sloppy soldering job. May be a small-time shop. ...

    Not only regarding the soldering. Instead of the obligatory
    (Schottky) diode in the +5v line from the tablet some intelligent
    person has placed an 0 ohms resistor (lower right corner of the PCB).

    ... Is there
    ny way to contact the manufacturer or the distributor?

    Unfortunately no.

    There's lots of experts in the group. Someone may be able to find it.

    Indeed, one super detective has found at least some basic data :-)!

    Regards,

    Reinhard

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  • From Reinhard Zwirner@21:1/5 to Don on Sat Jul 23 01:06:57 2022