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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

    [FAQ] Do I still need pull-up/pull-down resistors with bus-hold circuitry? 0 Locked

    2672 views
    0 replies
    Started over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC541A: SN74LVC541A Simulation Error 0 Locked

    291 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC4245A: What is the difference between SN74LVC4245A and SN74LVTH245A 0 Locked

    460 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    DS90CF384AQMTX/NOPB: ESD Information 0 Locked

    263 views
    2 replies
    Latest over 3 years ago
    by Hamzeh Jaradat
  • Answered

    SN74AVC4T774: input jitter introduced the output 0 Locked

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

    SN74ALVC164245: B side as input ,A side as output have jetter 0 Locked

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

    SN74AHC1G08: [SN74AHC1G08DBVR] Inquiries about differences in material content 0 Locked

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

    LSF0204: Drive Strength for 10-foot wire harness 0 Locked

    471 views
    5 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC1G175: Automotive grade 0 Locked

    436 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74LVTH16244A: ESD information 0 Locked

    222 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Answered

    SN74HCS7266: Looking for 1ch XNOR 0 Locked

    347 views
    2 replies
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV21A: About the output state 0 Locked

    284 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0204: LSF0204YZPR package information 0 Locked

    303 views
    3 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Not Answered

    SN74LVC2G125: Reset System 0 Locked

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

    SN74LVC1T45: What is the difference between SN74LVC1T45YZPR and SN74LVC1T45YZPRB? 0 Locked

    462 views
    8 replies
    Latest over 3 years ago
    by Michael J Schultis
  • Answered

    SN74LVC2G17: Failed part. Possibility of Latch-up or floating input ? 0 Locked

    1209 views
    6 replies
    Latest over 3 years ago
    by Volodymyr Melnyk
  • Suggested Answer

    SN74LVC16T245: Interference in ground isolate 0 Locked

    1101 views
    11 replies
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74HC244-EP: ESD information 0 Locked

    390 views
    4 replies
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74HC240: Please support us for Land pattern of SN74HC240NSR 0 Locked

    297 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74HC541: Please support us for Land pattern of SN74HC541N 0 Locked

    325 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
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