Recent content by cyberfreak

  1. cyberfreak

    SRAM Substitute : Address lines ??

    Hi All, Please see attached 2 SRAM devices ; I want to replace or subtitute the HM62W8512B (512kB) with the HM62V8100I (1MB). Both have an access time of 55nS, but as we know the 1MB one has 1 address line more. What I need to know is by comparing the drawings, must the address lines be...
  2. cyberfreak

    Logic Level MOSFET switching off

    Hi AudioGuru How my design fits together is the following: +12VI is connected to my load and my load return(gnd) is connected to the same ground as my battery. Another external 12V PSU (in-case no solar cells avialable) is connected to +12VI and same ground. My logic sense if there is an...
  3. cyberfreak

    Logic Level MOSFET switching off

    Hi AudioGuru Answer to your first question: Don't know really why I chose to use 2 Mosfets in series. Maybe because I've read somewhere that the diode inside the Mosfet can help stopping any leakage current. Something like that. I realized before my last post that it is not really necessary...
  4. cyberfreak

    Logic Level MOSFET switching off

    Hi AudioGuru Please find attached my schematic. As you can see, I must connect the Battery to Drain, so that the Battery's positive is isolated when the MOSFET is off. As you explained, that means I must use a P-Channel MOSFET instead and change my gate driver to an OR gate. But, how will I...
  5. cyberfreak

    Logic Level MOSFET switching off

    Hi AudioGuru Thank you for showing me out that line on the datasheet. My Application is to switch a 12V Battery on or off by the logic NOR gate. Another interesing question arrises: There will be some voltdrop across the Source and Drain, due to Rds, when I apply 12V to the gate. Question is...
  6. cyberfreak

    Logic Level MOSFET switching off

    Will logic level MOSFETS turn off when 0V is applied to the Gate? Using this MOSFET as an example: http://www.fairchildsemi.com/ds/FD/FDS6961A.pdf
  7. cyberfreak

    Logic Level MOSFETs

    Hi AudioGuru You helped me shine some light on the matter. The MOSFET that I am looking at using, is the FDS6961A. http://www.fairchildsemi.com/ds/FD/FDS6961A.pdf Looking through the datasheet and comparing it with the 2N7000, you used, I found that Vgs=4.5V will draw Id=2.8A, which is more...
  8. cyberfreak

    Logic Level MOSFETs

    Hi I need to confirm the theory about Logic Level MOSFETs. How does it work? 0V to switch it off and 5V to switch it on, type of thing? Can someone please help me?
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