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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 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
  • [FAQ] When will TI End of Life (EOL) or Obsolete a certain logic device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Quality and Manufacturing >> Current FAQ TI's General Quality Guideline (page 7) describes our official policy on obsoleting a device. This policy is summarized below. TI's Product withdrawal/discontinuance process…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What are the power sequencing requirements for the translation device?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ Some of the TI translators have requirements during normal operation mode to have Vcca <= Vccb ( TXS/ TXB01xx) or Vrefb>= VrefA+0.8V(LSF). However, the TI translation devices do…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between IOFF and VCC isolation? What are the conditions to guarantee it?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The I OFF specification guarantees the I/O ports are in high impedance whenever either one of the power supply is at pulled to ground (0V) or close to gnd(<100mV as specified for the…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What should be done with unused I/O pins of the level translator devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ For the TXB family, unused I/O ports are recommended to be tied to GND through a weak pulldown resistors (>=100kohm). For TXS devices, the internal 10kohm pull-ups resistors will…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] Why is there no PSpice model for a Monostable Multivibrator device?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ To make a long post short: MMVs cannot be directly simulated by PSpice because of their direct dependence on external components…
    • over 6 years ago
    • Logic
    • Logic forum
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  • Answered

    CD74HC192: カウンタ動作について 0 Locked

    401 views
    2 replies
    Latest over 1 year ago
    by ?? ?
  • Suggested Answer

    TXU0304: Max data rate when going from 1.8V -> 1.2V at 25°C 0 Locked

    204 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Answered

    SN74LV1T04-Q1: Is the SN74LV1T04-Q1 IC output inverted or non-inverted? 0 Locked

    296 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC2G34: Will loss of power cause chip failure? 0 Locked

    243 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    CD4093B-MIL: CD4093B-MIL 0 Locked

    329 views
    2 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHCT74Q-Q1: FMEDA calculation file request 0 Locked

    240 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC1G123: Pin numbering chart discrepancy 0 Locked

    232 views
    2 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74AXC8T245: Level shifter, RAD hard, 3.3V uP and a 5V data 0 Locked

    705 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LV1T32: SN74LV1T32DBVR 0 Locked

    187 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LV1T00: 1.8V logic level for 5v Vcc 0 Locked

    250 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G175: The High-level input voltage parameter VIH can reach below 2V 0 Locked

    436 views
    4 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1G34: SN74AUP1G126DSF 3D File 0 Locked

    419 views
    3 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC1G17-Q1: Schmitt-Trigger Buffer current consumption 0 Locked

    378 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVTH125: Part Recommendation 0 Locked

    307 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74HCS74: Datasheet Supply voltage max vs Absolute max 0 Locked

    270 views
    2 replies
    Latest over 1 year ago
    by Scott Swanson
  • Suggested Answer

    SN74LS244: SN74LS44 0 Locked

    301 views
    2 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    TXU0304-Q1: Any issues connecting output/A4Y of two TXU0304-Q1 together? 0 Locked

    370 views
    5 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    TXS0104E: Input voltage level when using two/more devices. 0 Locked

    433 views
    10 replies
    Latest over 1 year ago
    by Jan Fink
  • Answered

    SN74LVC1G07: Output pin state when the part is un-powered 0 Locked

    278 views
    2 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74HC244: SN74HC244PWR and SN74HC244APWR 0 Locked

    247 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
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