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Logic

Logic

Logic forum

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Texas Instruments (TI) Logic support forum is an extensive online knowledge base where millions of technical questions and solutions are available 24/7. You can search logic IC content or ask technical support questions on everything from voltage level translation and transceivers to standard logic gates and specialty logic devices. Find the right solution for your circuit design challenges by using our TI E2E™ support forums that are supported by thousands of contributing TI experts.
Frequent questions
  • [FAQ] How do I configure a monostable multivibrator's inputs for rising/falling edge triggering?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Logic function table for the SN74LVC1G123 Most monostable multivibrator (MMV) devices have very similar logic tables to…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] With Open-Drain outputs, can I ...use them to shift a logic voltage level? ...connect the outputs directly together? ...force a voltage node to zero?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ The answer to all three questions is "yes" - these are the three primary uses of open-drain outputs on logic devices. Much of this also…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] Can I connect the Cext pin to ground on a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A , SN74LVC1G123 , SN74LV123A , SN74221 , SN74LS221 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ For the majority of MMV devices, y es, the Cext pin can be grounded. The Cext…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do you determine the output pulse width and the 'K' value for a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The output pulse width (tw) is determined with the following equation: tw = K * R * C with R := external timing resistor, C := external timing capacitor, K := timing constant…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do I terminate an unused channel of a monostable multivibrator (one shot)?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Unused channels for a logic monostable multivibrator (MMV) such as the SN74LV221A should be terminated such that: (1) All inputs…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How does a monostable multivibrator (one shot) work?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The above functional block diagram shows generally how a monostable multivibrator (MMV, or one-shot) works. Not all of them have every part shown, but this is the most common…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What's the difference between TTL and 5V CMOS logic?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ It's very common for people to refer to "TTL logic" and to actually mean "5V logic" -- but how are they different? The key difference is in the input and output voltages. This graphic…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference in timing between gates in the same device? How much skew is expected within a given logic device? What is the part-to-part skew?

    Karan Kotadia
    Karan Kotadia
    FAQ: Logic and Voltage Translation > Timing Parameters >> Current FAQ The difference in delay between the individual channels on an individual part is referred to as channel-to-channel skew or output skew. This is typically not covered as a datasheet…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between the SN74HCxx and the SN74HCxxA?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN7400 , SN74LS00 FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The High-speed CMOS (HC) logic family was created as a direct replacement for older bipolar junction transistor based transistor…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What method is best used for estimating specification values between those given in the datasheet?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ The most common example of this question comes from the fact that Standard Logic devices are specified at 1.65V, 3V, and 4.5V, however most engineers use our devices at 1.8V, 3.3V…
    • over 6 years ago
    • Logic
    • Logic forum
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  • Answered

    SN74LV4T125: what's the state of OE and A state when unconnected? 0 Locked

    447 views
    3 replies
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC2G126: About switching speed spec 0 Locked

    510 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0108E: TXS0108 problem with long line. 0 Locked

    4529 views
    6 replies
    Latest over 6 years ago
    by ShreyasRao
  • Not Answered

    [FAQ] What is the maximum data rate (or operating frequency) for a logic gate or buffer? 0 Locked

    5946 views
    0 replies
    Started over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G126: Current consumption of SN74LVC1G126DRLR 0 Locked

    334 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC244A: Recommendation to replace the SN74LVC244 0 Locked

    696 views
    5 replies
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74AHC14: Low input capacitance schmitt triggers 0 Locked

    692 views
    1 reply
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    by Emrys Maier
  • Answered

    looking for a right solution 0 Locked

    349 views
    3 replies
    Latest over 6 years ago
    by Ben Kuo
  • Suggested Answer

    SN74LVC138A: Support voltage of the 3 line to 8 line decoder 0 Locked

    675 views
    3 replies
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    TXS02612: TXS02612 0 Locked

    2901 views
    6 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    TXB0104: TXB0104 Oscillation 0 Locked

    2331 views
    2 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    TXB0108: TXB0108 does not work. At the output of 1.6V 0 Locked

    1131 views
    6 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    TXB0104: TXB0104YZTR 0 Locked

    669 views
    3 replies
    Latest over 6 years ago
    by Karan Kotadia
  • Suggested Answer

    TXS0108E: Abnormal output voltage on port B... 0 Locked

    1516 views
    8 replies
    Latest over 6 years ago
    by Karan Kotadia
  • Answered

    SN74LVC1T45-Q1: SN74LVC1T45QDCKRQ1 0 Locked

    343 views
    3 replies
    Latest over 6 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC1T45: Driving capability 0 Locked

    362 views
    1 reply
    Latest over 6 years ago
    by Karan Kotadia
  • Not Answered

    [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y? 0 Locked

    12073 views
    0 replies
    Started over 6 years ago
    by Karan Kotadia
  • Suggested Answer

    SN74AVCH8T245: I need IBIS model for the QFN (RHL surfix) package 0 Locked

    490 views
    2 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    SN74LVC2G07: SN74LVC2G07 5V VIH Pull Up Resistor 33.2Kohm 0 Locked

    913 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AVCH4T245: Strong characteristics comparison for noise of LSF0204RUTR and SN74AVCH4T245PWR 0 Locked

    680 views
    5 replies
    Latest over 6 years ago
    by Emrys Maier
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