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  • RE: SN74LS156: Problems with OC logic

    Hi Cris, I can try to help out with the logic side -- for the LDO, I'd recommend posting to the LDO forum. I'm curious why you went with the LS family of logic over a more modern family like ABT? The old SN7400, S, and LS families are notoriously…

  • Converter for 5V TTL signal to 1.8V signal

    TI Thinks Resolved
    Other Parts Discussed in Thread: SN74LVC125A , TXB0104 , SN7400 , SN74GTL2003 H, I'm looking for a 5V to 1.8V digital converter. I have 4 TTL levels signals that are to be interfaced to my 1.5V/1.8V FPGA IO pins. Can anyone let me know any part compatible…
    • Answered

  • CD40109B: CD40109B

    Resolved
    Part Number: CD40109B Other Parts Discussed in Thread: SN7400 I need to translate a driving voltage from 5 V to 15 V. Your IC CD40109B is very interesting for this purpose. I am planning to supply VCC with 5 V and VDD with 15 V. I have following questions…
    • Resolved
    • Answered

  • SN7402: Quad Dual-Input NOR Gate -- inputs are sinking substantial current when a logical high is applied (!?!)

    Resolved
    Part Number: SN7402 The input(s) is(are) sinking substantial current (milliamperes) when a logical high (+5 VDC / Vcc in this case) is applied to the input. My understanding from decades of practice, and from the specification sheet, is that TTL inputs…
    • Resolved

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