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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

    SN74AUC16245: Fast bus switching or selection in a 1v8 to 3v6 system 0 Locked

    358 views
    6 replies
    Latest over 1 year ago
    by Bill Kury
  • Answered

    SN74LVC1G123: Retrigger time requirement/calculation 0 Locked

    394 views
    5 replies
    Latest over 1 year ago
    by Ian Graham
  • Answered

    TXU0104: Control the power supplies asynchronous 0 Locked

    195 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    CD74AC138: Part recomendation wanted for demuxing SPI CS 0 Locked

    196 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC8T245: Power supply requirements 0 Locked

    271 views
    4 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC595: SN74HC595PW failure mode and 0 Locked

    402 views
    7 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Not Answered

    SN74LVC244A: Delay Variation Issue 0 Locked

    487 views
    11 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC3G17: Does TI has Pin-to-pin Q-grade or good Q-grade solution for SN74LVC3G17DCUR 0 Locked

    279 views
    2 replies
    Latest over 1 year ago
    by Michael Marinello
  • Suggested Answer

    SN74AXCH4T245: leakage problem 0 Locked

    199 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LV1T34: SN74LV1T34DBVR 0 Locked

    188 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    TXB0108: TXB0108PWR 0 Locked

    263 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Answered

    SN74AXCH8T245: SN74AXCH8T245RHLR Max. IO toggling speed 0 Locked

    274 views
    4 replies
    Latest over 1 year ago
    by Blessing Selvakumar
  • Answered

    SN74ALS245A: differences between SN74ALS245A-1DBR and SN74ALS245ADBR 0 Locked

    277 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC244: Bi-directional buffer 0 Locked

    434 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC14: How to calculate the current going into a channel in 74HC14? 0 Locked

    302 views
    2 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    CD74HC541: IBIS Model 0 Locked

    258 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC14A: marking rule 0 Locked

    339 views
    7 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Not Answered

    SN74HC595: Is it normal for the chip without logo? 0 Locked

    329 views
    5 replies
    Latest over 1 year ago
    by Owen Westfall
  • Suggested Answer

    LSF0204: LSF0204 vs LSF0204D 0 Locked

    293 views
    2 replies
    Latest over 1 year ago
    by Jonathan Navor
  • Suggested Answer

    SN74LVC2G02: |tPLH-tPHL| question 0 Locked

    468 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
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