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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 6 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

    SN74HC595: several question from datasheet 0 Locked

    2952 views
    7 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Answered

    SN74AVCH32T245: Maximum Pull-up resistor allowed to detect a valid Logic High 0 Locked

    704 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Answered

    LMC567: LMC567 OPERATION WITH PULSE TRAIN AT INPUT 0 Locked

    6970 views
    16 replies
    Latest over 8 years ago
    by robin gangopadhya
  • Not Answered

    SN74ALVCH16373: Seeking characterization data for this part 0 Locked

    741 views
    2 replies
    Latest over 8 years ago
    by ShreyasRao
  • Answered

    TXB0108: 3.3V TTL to 5V CMOS bidirectional level shifter 0 Locked

    2569 views
    4 replies
    Latest over 8 years ago
    by Francesco Bausi
  • Answered

    TXB0101: TXB0101 / Connection of unused bus 0 Locked

    709 views
    2 replies
    Latest over 8 years ago
    by S.Satoshi
  • Answered

    SN74LVC1T45: Max Data Rates 0 Locked

    876 views
    3 replies
    Latest over 8 years ago
    by Michael Koelbl
  • Suggested Answer

    SN74LVC1G125: VOL and VOH when VCC is 1.8V 0 Locked

    1069 views
    3 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0108: Reading TTL levels from voltage divider 0 Locked

    2982 views
    5 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0104E: Rising & Falling timing 0 Locked

    1720 views
    3 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: rising edge became slow on VREF B side 0 Locked

    1020 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Not Answered

    SN74LS624: Voltage and Frequency Control 0 Locked

    1297 views
    4 replies
    Latest over 8 years ago
    by Michael J Schultis
  • Suggested Answer

    TXS0108E: TXS0108E VDDA and VDDB voltage 0 Locked

    2243 views
    4 replies
    Latest over 8 years ago
    by ShreyasRao
  • Answered

    SN74LVC1G66: Understanding limits of I/O and Vin Voltage 0 Locked

    1251 views
    3 replies
    Latest over 8 years ago
    by Louie
  • Suggested Answer

    TXB0102: TXB0102: is OE needed to connected to ground during powering up 0 Locked

    1329 views
    5 replies
    Latest over 8 years ago
    by Yarn Guo
  • Suggested Answer

    SN74AVC2T245: Generated footprint and 3D Model issue 0 Locked

    1102 views
    3 replies
    Latest over 8 years ago
    by Oliver Landine - WEBENCH® Design Center
  • Suggested Answer

    TXS4555: Pull Up/Pull Down Resistors 0 Locked

    1129 views
    3 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    When SN74LVC1G07 power off, the output have ground bound 0 Locked

    1946 views
    3 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G11: A few issues / questions 0 Locked

    1866 views
    7 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T774: Lowering VCCA voltage 0 Locked

    1126 views
    2 replies
    Latest over 8 years ago
    by Den L
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