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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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  • Not Answered

    CD74HC4094: Data transition of QS2 0 Locked

    494 views
    4 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC1G17: SN74LVC1G17QDCKRQ1 - with Higher Output Current 0 Locked

    361 views
    2 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    LSF0204: Continue the question thread : Higher push pull resistor 0 Locked

    686 views
    7 replies
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AUP1G00: output under no supply 0 Locked

    595 views
    4 replies
    Latest over 5 years ago
    by Amr Elhadidy
  • Answered

    SN74LVC1G32-Q1: output in case of disconnected supply 0 Locked

    475 views
    2 replies
    Latest over 5 years ago
    by Amr Elhadidy
  • Suggested Answer

    SN74LVCH32245A: Alternative to LTB SN74LVCH32245AZKER 0 Locked

    468 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    CD74HC154: Question about the test circuit 0 Locked

    1037 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC2T45: What parameters should be focused on if we want to confirm the max rate of the device? 0 Locked

    305 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC125A: Partial power down and HIZ during power up 0 Locked

    312 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN74AXC8T245: Input Protection / Use on 5V logic 0 Locked

    971 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    TXS0102: Low-levels are relatively high 0 Locked

    258 views
    2 replies
    Latest over 5 years ago
    by franziskus
  • Suggested Answer

    SN74AVC4T245: Excess current draw during high impedance state 0 Locked

    492 views
    6 replies
    Latest over 5 years ago
    by Mark Olivier
  • Answered

    CD54HC4024: Difference between CD54HC4024F & CD54HC4024F3A 0 Locked

    294 views
    2 replies
    Latest over 5 years ago
    by Art Mecina
  • Suggested Answer

    SN74ALVC16244A: foot print data 0 Locked

    326 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    TXS0102-Q1: OE pin max input voltage 0 Locked

    239 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Not Answered

    SN74LVC541A: Problem happens after 20 hours of continuous work 0 Locked

    328 views
    2 replies
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    CF4320H: Do you have any alternative device to CF4320H? 0 Locked

    411 views
    3 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LVTH162245: Differences among part numbers 0 Locked

    499 views
    1 reply
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    SN74AXC4T774-Q1: Similar Part Recommendation 0 Locked

    288 views
    1 reply
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    SN74LVC1T45: Anything wrong at <= 3.6V oparation 0 Locked

    336 views
    2 replies
    Latest over 5 years ago
    by Dylan Hubbard
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