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general semi dual mosfets part number in so-8 package

Discussion in 'Electronic Components' started by Matthieu Benoit, Jul 12, 2006.

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  1. Hello,
    It seems that General Semiconductors (now Vishay) no longer manufactures
    any mosfets.
    I am looking for replacing a MOSFET house-numbered by BOSCH / ISKRA
    Slovenia "B57916" and with the logo og General Semiconductors.
    the package is SO-8 marking after finishes with "NL" which stands for
    SO-8 package at GENERAL SEMI.
    GND is connected on pin-4
    Power os connected on pin-5
    pin-1 is connected to a dual-diode BAV70 through some resistors.

    any part number (siliconix, etc.. or other that could suit
    interest me
    Thanks,
    Matthieu
     
  2. Franc Zabkar

    Franc Zabkar Guest

    FWIW, General Semi's dual MOSFETs appear to be numbered as GFxxxx.
    Unfortunately all the SO-8 packages that I've found (eg GF9926,
    GF4953, GF4936, GF2918, GF2524) connect pin5 to drain D2 and pin 4 to
    gate G2. A grounded gate wouldn't make sense, would it?

    Are any of the pins shorted internally? For example, do pins 5 and 6
    both connect to D2 ???

    - Franc Zabkar
     
  3. Franc Zabkar a écrit :

    Hi Franc :
    There is no pin connected each other
    there is something connected one pin 1 : pin 1 through a 100K resistor
    is connected to a dual diode BAV70
    all the pins have a junction refered to pin 4 (junction of 0.5 volts
    with a fluke muli-meter)
    seems that vishay do not want to help
    @+
    Matthieu
     
  4. Franc Zabkar a écrit :
    Hi Eveerybody

    Seems that this so-8 package integrated circuit from general
    semiconductor
    may be something else than a dual jfet???
    the ic is explosed and the dual diode BAV70 as well.
    gnd is on pin-4 and power on pin-5 (power is connected to a LM317T
    output through
    a resistor) - pin 1 is connected someway to a BAV70 dual diode through
    a 100K resistor.
    there is no pin connected one another; also when you test with a diode
    meter
    of a good ic you can see that there is a junction (0.5Volts) between
    all the pins
    to the ground (pin-4).
    any help greatly appreciated.
    Regards,
    Matthieu
     
  5. Franc Zabkar

    Franc Zabkar Guest

    Could it be an array of transient voltage suppressor diodes/zeners ???
    Clamping diodes?

    - Franc Zabkar
     
  6. Franc Zabkar a écrit :

    Hi Franc,

    I thank you for your reply , I will inquire more
    Thanks,
    Matthieu
     
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