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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

    SN74HC14: output voltage 0 Locked

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

    15v to 3.3v level shifter 0 Locked

    667 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G17: Missing Footprint 0 Locked

    600 views
    8 replies
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G74: Need Transient SPICE Model for simulation 0 Locked

    1353 views
    3 replies
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  • Suggested Answer

    SN74AXC1T45: What is the difference between SN74AVX and SN74AXC series devices? 0 Locked

    1081 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    TXS0108E: VOHA/VOHB specification 0 Locked

    335 views
    1 reply
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  • Answered

    SN74LVC1G125-Q1: Iq current requirement 0 Locked

    424 views
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  • Answered

    SN74LVC157A: SN74LVC157ARGYR Max Junction Temperature 0 Locked

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    449 views
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  • Suggested Answer

    SN74LVC2G74-Q1: The max pulse current into the output pin 0 Locked

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    TXB0104: Throughput of TXB0104 & TXB0106 0 Locked

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  • Answered

    SN74HCS244: SN74HCS244 0 Locked

    335 views
    2 replies
    Latest over 2 years ago
    by Elena Faventi
  • Suggested Answer

    SN74HC573A: Outputs going high during power cycle for short duration. 0 Locked

    959 views
    6 replies
    Latest over 2 years ago
    by Omprakash Sankaran
  • Suggested Answer

    SN74LXC1T14: Level translation from IO level to 28V 0 Locked

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    by Michael Ikwuyum
  • Answered

    TXS0102: The difference between TXS0102 and LSF0102 0 Locked

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

    SN74HC373: internal protection for input /output 0 Locked

    400 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
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    Compare Discrete Logic Devices Die maps 0 Locked

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    damaged buffer SN74LVC244ADB 0 Locked

    880 views
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    Latest over 2 years ago
    by Elena Faventi
  • Suggested Answer

    SN74HCS165: Doubt about Schmitt trigger VT- input level of the HCS logic family at 3.3V 0 Locked

    440 views
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