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Mystery ULN2003APG

Discussion in 'Datasheets, Manuals or Parts' started by Teufelwolf, Apr 7, 2015.

  1. Teufelwolf

    Teufelwolf Member

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    I ordered some ULN2003APG that where supposed to have been made my Toshiba, but instead I got some parts with a logo I have never seen. I googled like mad, searched logo databases and came up blank, anyone know what company these are from?

    The logo looks like a 7*L - see attached.
     

    Attached Files:

  2. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

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    Your distributor should do this. Is there a good reason for being concerned?

    It's probably ZZ with the star being the part of the logo for the People's Republic of China flag.

    so there.
     
    Last edited: Apr 7, 2015
  3. Teufelwolf

    Teufelwolf Member

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    That is a dead end. They are on my DO NOT USE list.
    They work like a ULN2003APG should, I tested a few using a 4W LED.
     
  4. dave

    Dave New Member

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  5. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

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    Then you need to use trusted Distributors, with traceability.
     
  6. atferrari

    atferrari Well-Known Member

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    Maybe Zorro teamed with 7 Up :wideyed: or close to. :p
     
    • Funny Funny x 1
  7. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

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    Do you want to re-qualify the parts? There are companies that will certify the performance.
    At least they do not have a fake logo.

    http://www.semiconductors.org/clientuploads/directory/DocumentSIA/Anti Counterfeiting Task Force/SIA Anti-Counterfeiting Whitepaper.pdf

    I spent a year working for an Electronics Broker from Long Island, so I have a lot of experience/ opinions. As a former Test Engineer and TE Mgr, the key to testing is HALT/HASS, not just benign go/nogo tests, for reliability margin testing; But this is not widely practised.
     
  8. hotwaterwizard

    hotwaterwizard Active Member

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    Here is the Datasheet
     

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  9. atferrari

    atferrari Well-Known Member

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    Never used them. Reading the datasheet I realized that the diodes are all returned to a common pin. :wideyed:
     
  10. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    at:

    These are very common relay drivers. They basically don;t need power because they are basically Darlington transistors when you remove the internal diodes.

    Common is somewhat of a misnomer, but it's really +V or the common point of a relay that is connected to ground by the ULN2003 to turn them on. So, the device contains the internal coil suppression diodes. They can be left unconnected when driving things such as LEDs.

    They are also useful because with an input in High Z, the relay is off, A low it is off and a high it is on. So when a micro powers up as an input, the relays are off.
     
  11. MaxHeadRoom78

    MaxHeadRoom78 Active Member

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    It threw me the first time I saw it as I use common for power common (-ve) instead of Ground because in NA GND is also Earth.!
    But the data sheet full description is Common connection for reverse diodes.;)
    Max.
     
  12. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

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    Common Cathode in this case
     
  13. Teufelwolf

    Teufelwolf Member

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    Well the who and what for of these no longer matters as I found a buyer on ebay to take them off my hands for $8.00
     

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