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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

    SN74AHC16373: Ibis Model 0 Locked

    292 views
    2 replies
    Latest over 5 years ago
    by user3620435
  • Suggested Answer

    SN74LV74A: parameters in datasheet 0 Locked

    287 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    TXB0106: TXB0106 application 0 Locked

    599 views
    5 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T245: Thermal information check 0 Locked

    194 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    CD74HCT688: ESD rating and standard 0 Locked

    324 views
    4 replies
    Latest over 5 years ago
    by Carlo
  • Answered

    TXS0102: VOHB/VOLB 0 Locked

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

    SN74LVC1G175: What different about Ii and Icc of SN74LVC1G175 0 Locked

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

    SN74AVC4T774: maximum operating frequency on VccA=VccB=3.3v 0 Locked

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

    SN74AVC4T774: Driving ability of capacitive load SN74AVC4T774 0 Locked

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

    TXS0102: Marking issue 0 Locked

    364 views
    2 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74LV221A: Replacing SN74HCT221A 0 Locked

    721 views
    5 replies
    Latest over 5 years ago
    by Harry McNally
  • Answered

    Fungus resistant mold compounds 0 Locked

    466 views
    1 reply
    Latest over 5 years ago
    by Jeffery Pfarr
  • Answered

    SN74LVC1G58: input inpededance in unpowered condition 0 Locked

    407 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Not Answered

    TXS0102: TXS0102DQMR pin 1 indicator dimention 0 Locked

    729 views
    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Not Answered

    TXB0106: oscillation at 35.800 Mhz 0 Locked

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

    SN74LVC2G74: SN74LVC2G74 0 Locked

    411 views
    2 replies
    Latest over 5 years ago
    by Matt Karaerik
  • Not Answered

    SN74LV123A: 0 Locked

    296 views
    5 replies
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    SN74LVC1G97: Spice model for the whole LVC1G family 0 Locked

    1867 views
    4 replies
    Latest over 5 years ago
    by Tim Netherwood
  • Suggested Answer

    SN74LVC1G125: difference between SN74LVC15125 and AHV1G125 0 Locked

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

    SN54HC14-SP: EM model available for 5962-8409101VDA ? 0 Locked

    402 views
    3 replies
    Latest over 5 years ago
    by Emrys Maier
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