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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

    SN74LVC1T45-Q1: Voltage Translator 3.3V to 3.3V 0 Locked

    286 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Answered

    SN74LXCH8T245: Voltage Translator: 3.3V to 3.3V 0 Locked

    274 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    LSF0108: Data rate supported for 1.2V to 1.8V level translation 0 Locked

    337 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74ACT244: 4-channel version recommendation and package information 0 Locked

    403 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0104E: IBIS model of the MPN: TXS0104ERGYR 0 Locked

    621 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G57: 3.3V to 5V Translation 0 Locked

    1175 views
    4 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC2G17: SN74LVC2G17 It will support UART ARE NOT ???? 0 Locked

    440 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74HC595: SN74HC595 0 Locked

    628 views
    5 replies
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    TXS0102-Q1: TXS0102-Q1 compare with TXS0201 0 Locked

    515 views
    3 replies
    Latest over 4 years ago
    by joe lindula
  • Not Answered

    [FAQ] What are the performance specifications of the HCS logic family at 3.3V operation? 0 Locked

    4551 views
    0 replies
    Started over 4 years ago
    by Emrys Maier
  • Answered

    SN74AUC1G125: xOE signal before VCC 0 Locked

    348 views
    1 reply
    Latest over 4 years ago
    by Chad Crosby
  • Answered

    SN74LVC1G123: Which schematic would be better? 0 Locked

    319 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    CD74HC40103: Need a Logic Diagram 0 Locked

    366 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    CD74AC14: CD74AC14M max junction temperature 0 Locked

    257 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    SN74HCS244-Q1: looking for 74CBTLV3245-Q100 replacement 0 Locked

    401 views
    2 replies
    Latest over 4 years ago
    by Sherry Liang
  • Answered

    LSF0204: Propagation delay of LSF0204RUTR 0 Locked

    247 views
    2 replies
    Latest over 4 years ago
    by Danilo A.
  • Answered

    CD74AC14: What is the max operating junction temperature for the CD74AC14M? 0 Locked

    237 views
    2 replies
    Latest over 4 years ago
    by Ryan Creel
  • Answered

    SN74LVC2GU04: Peak clamping current 0 Locked

    383 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LV138A: Enable and select input 0 Locked

    221 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Not Answered

    TXB0304: Overshoot at TXBN0304RUTR output 0 Locked

    277 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
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