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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

    SN74LVTH125: Source current damage threshold on short to gnd fault. 0 Locked

    541 views
    8 replies
    Latest over 2 years ago
    by Anton Grounds
  • Answered

    SN74AHCT245: How to Identify DC Information from Labels and marking 0 Locked

    493 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV1T126: Delta Icc of the buffer 0 Locked

    346 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Not Answered

    [FAQ] Why do some SOT package parts from TI have a pin that is not in the mechanical drawing? 0 Locked

    2205 views
    0 replies
    Started over 2 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AXC4T774-Q1: Switching Characteristics 0 Locked

    373 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    SN74LVC1G17: SN74LVC1G17DCK3 NC Pin 0 Locked

    357 views
    2 replies
    Latest over 2 years ago
    by Connor Dack
  • Suggested Answer

    SN74LVC1G373: Do we have D-type latches with automotive grade? 0 Locked

    407 views
    1 reply
    Latest over 2 years ago
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  • Answered

    CD74HC367: THERMAL INFORMATION 0 Locked

    465 views
    5 replies
    Latest over 2 years ago
    by Albert Xu1
  • Not Answered

    SN74LVC1T45-Q1: I am having trouble with a device attached to the A port 0 Locked

    462 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74HC132: SN74HC132D 0 Locked

    462 views
    3 replies
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0106-Q1: Both I/O ports can keep HIGH voltage 0 Locked

    311 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LV541A: SN74LV541ANSR Package dimension needed 0 Locked

    269 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS541: clamp diode structure 0 Locked

    375 views
    1 reply
    Latest over 2 years ago
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  • Answered

    SN74AHCT1G14: SN74AHCT1G14DBVR & SN74AHCT1G14DBVT 0 Locked

    433 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T774: diff between SN74AVC4T774RGYR & SN74AVC4T774RSVR 0 Locked

    300 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    LSF0204: Pull up resistor value limits for LSF devices 0 Locked

    397 views
    2 replies
    Latest over 2 years ago
    by Sai Sandeep Lolla
  • Suggested Answer

    SN74ABT245B: Part marking 0 Locked

    346 views
    1 reply
    Latest over 2 years ago
    by Ian Graham
  • Not Answered

    SN74LVC2G132DCUR Impedance Error 0 Locked

    367 views
    5 replies
    Latest over 2 years ago
    by Ian Graham
  • Answered

    SN74AVC2T45: Driving a bicolour LED 0 Locked

    396 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74ACT04: How to increase out drive current. 0 Locked

    424 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
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