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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

    SN74LVTH126: Thermal values request 0 Locked

    279 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN54F521: SN54F521J 0 Locked

    276 views
    1 reply
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN54HC14-SP 0 Locked

    512 views
    3 replies
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN54HC00-SP: SN54HC00-SP 0 Locked

    692 views
    8 replies
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN74LVC8T245: Problem with large current consumption 0 Locked

    901 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LVC1T45: DATA RATE ENQUIRY 0 Locked

    378 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AVC2T45-Q1 0 Locked

    874 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AVCH2T45: Power up sequence 0 Locked

    297 views
    1 reply
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74HC244: SN74HC244 operating temperature 0 Locked

    380 views
    3 replies
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    LSF0102: current leakage? 0 Locked

    881 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AVC4T245-Q1: Behavior at "voltage > abs.max voltage" on one side 0 Locked

    375 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    SN74AC244-EP: What is the junction temperature limit 0 Locked

    392 views
    2 replies
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN74AC244-EP: What is the resistance from junction to case (Theta_jc) 0 Locked

    396 views
    2 replies
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN74AUP1T17: TI's Recommended IC 0 Locked

    581 views
    2 replies
    Latest over 6 years ago
    by Katsu Sugita
  • Suggested Answer

    SN74AVC4T245: Sn74avc4t245 heating problem 0 Locked

    287 views
    1 reply
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    [FAQ] Difference between Multiplexer/De-multiplexer and Analog Switch 0 Locked

    4373 views
    3 replies
    Latest over 6 years ago
    by Adam Torma
  • Suggested Answer

    TICPAL22V10Z-25C: Replacement of PAL22V10 0 Locked

    689 views
    1 reply
    Latest over 6 years ago
    by Wade Vonbergen
  • Answered

    SN74LVC00A-EP: Is there any document for the difference between commerical grade, industrial grade, automotive grade and military grade? 0 Locked

    478 views
    1 reply
    Latest over 6 years ago
    by Wade Vonbergen
  • Suggested Answer

    SN74HC164: The overshoot 0 Locked

    448 views
    2 replies
    Latest over 6 years ago
    by leo xue
  • Answered

    SN74LV164A: PD and Tj 0 Locked

    432 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
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