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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

    TXS0108E: tolerance of VCCA and VCCB 0 Locked

    1088 views
    3 replies
    Latest over 8 years ago
    by domenyko
  • Suggested Answer

    SN74HC595: application of SN74HC595 for common anode digit LED 0 Locked

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

    TXS0108E: TXS0108E 0 Locked

    1467 views
    5 replies
    Latest over 8 years ago
    by ShreyasRao
  • Answered

    24-bit Bidirectional Buffer 0 Locked

    1717 views
    7 replies
    Latest over 8 years ago
    by Emrys Maier
  • Not Answered

    SN74LVC1G74: Max reflow soldering temperature of SN74LVC1G74DCTR? 0 Locked

    747 views
    2 replies
    Latest over 8 years ago
    by Michael J Schultis
  • Not Answered

    SN74LVC8T245: Request to suggest Four bit equivalent part 0 Locked

    855 views
    2 replies
    Latest over 8 years ago
    by ShreyasRao
  • Suggested Answer

    SN74ABT541B: Overshoot of Output (Yn) is observed. 0 Locked

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

    SN74LVT16244B: min value of input Voltage 0 Locked

    589 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC573A: About TJ of SN74LVC573Apwr 0 Locked

    667 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    SN74LVCC3245A: ViL, ViH, VoH,VoL 0 Locked

    3043 views
    5 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC257A: Max reflow temp? 0 Locked

    592 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Not Answered

    LOGIC GATE 0 Locked

    783 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74ALVC164245: Data transfer rate of SN74ALVC164245DGGR 0 Locked

    1418 views
    5 replies
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    SN74ACT245: About DIR status 0 Locked

    666 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC3G34: Oscillation at the output 0 Locked

    942 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0104E: Roadmap of TXS0104E 0 Locked

    1284 views
    4 replies
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    TXS0108E: IO ports state when VccA or VccB is not supplied voltage 0 Locked

    1113 views
    3 replies
    Latest over 8 years ago
    by ShreyasRao
  • Suggested Answer

    Negative power level conversion 0 Locked

    1127 views
    4 replies
    Latest over 8 years ago
    by Emrys Maier
  • Not Answered

    SN74ACT245: About absolute input voltage range, VI 0 Locked

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

    LSF0204: down shift queston 0 Locked

    3749 views
    10 replies
    Latest over 8 years ago
    by [FAE] Andrew Wang
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