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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

    SN74LVC1G125 as a level shifter 0 Locked

    1198 views
    3 replies
    Latest over 15 years ago
    by Roger Plante
  • Not Answered

    Loading down the sn74auc1g126 0 Locked

    324 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Answered

    SN74AVC4T245 Power Consumption 0 Locked

    484 views
    2 replies
    Latest over 15 years ago
    by Steven Carter
  • Not Answered

    SN74AVCH4T245 and SN74AVCH8T245 bus hold circuitry pulls substantial current 0 Locked

    424 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Not Answered

    PCA9545A and usage with different voltages levels on I2C busses 0 Locked

    1247 views
    5 replies
    Latest over 15 years ago
    by Roland Pang
  • Not Answered

    The spec of input transition rate of LVC00A,04A,06A,07A 0 Locked

    548 views
    4 replies
    Latest over 15 years ago
    by Hiroshi Hashimoto16564
  • Answered

    SN74AVC24T245ZRGR Need Prop delay 1-641580006 0 Locked

    854 views
    1 reply
    Latest over 15 years ago
    by Hattie
  • Not Answered

    SN74LVC1G04DCKR IBIS model 0 Locked

    320 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Answered

    SN74AVCH8T245 | If I bring the part up with the OE_L signal pulled high, will the part accept having it’s input/output lines pulled without damage? 0 Locked

    406 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Answered

    Power Consumption in SN74AVC16T245 0 Locked

    387 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Not Answered

    SN74CBTLV1G125DCKR vs. 74CBTLV1G125DCKR, what is the difference? 0 Locked

    359 views
    1 reply
    Latest over 15 years ago
    by Chris Cockrill
  • Suggested Answer

    Need Auto-sensing level shifter/bus switch 0 Locked

    398 views
    1 reply
    Latest over 15 years ago
    by Hattie
  • Not Answered

    TXS0108E external pull-up spec 0 Locked

    581 views
    1 reply
    Latest over 15 years ago
    by Hattie
  • Not Answered

    I2C hotswap @ 1.5V similar to TCA4311 0 Locked

    367 views
    1 reply
    Latest over 15 years ago
    by Hattie
  • Not Answered

    TTL gate characteristics 0 Locked

    694 views
    3 replies
    Latest over 15 years ago
    by Chris Cockrill
  • Suggested Answer

    TPD8S009 running at 3.75Gb/s 0 Locked

    563 views
    2 replies
    Latest over 15 years ago
    by Hattie
  • Answered

    LVC2G04 delay skew specification 0 Locked

    515 views
    2 replies
    Latest over 15 years ago
    by Jeroen Van den Keybus
  • Not Answered

    Working with bipolar analog signal with 74auc2g53 0 Locked

    637 views
    2 replies
    Latest over 15 years ago
    by Barry Demers
  • Answered

    Programming TLC59116 0 Locked

    635 views
    3 replies
    Latest over 15 years ago
    by Hattie
  • Not Answered

    SN74LV815AN counter problem 0 Locked

    1279 views
    2 replies
    Latest over 15 years ago
    by Oto Meran
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