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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

    SN74AUP1T34: Looking for alternatives because of allocation 0 Locked

    697 views
    2 replies
    Latest over 4 years ago
    by Steffen Fuchs
  • Suggested Answer

    SN74LVC1G125: About FMEA information of SN74LVC series 0 Locked

    360 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AUP1G97: Difference 0 Locked

    415 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LV244A: Please tell me about the case where the undershoot is below -0.5V. 0 Locked

    398 views
    3 replies
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74HCS72: SN74HCS72 Input Voltage 0 Locked

    350 views
    2 replies
    Latest over 4 years ago
    by Karan Kotadia
  • Not Answered

    SN74HCS138: Using a MSP432 controller to give Vcc to the device 0 Locked

    280 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Answered

    SN74LVC06A-Q1: Output leakage current 0 Locked

    1513 views
    5 replies
    Latest over 4 years ago
    by Yuya
  • Answered

    SN74HCS237: doubts on datasheet SN74HCS237 0 Locked

    404 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    TXU0304-Q1: Check with spec (replace SN74LVC2T45-Q1) 0 Locked

    582 views
    9 replies
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    SN74AC14: Please tell me about the case where the undershoot is below -0.5V. 0 Locked

    348 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0104E: Question on TXS0104/TXS0108E schematic 0 Locked

    598 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    14-24-LOGIC-EVM: Board thickness 0 Locked

    438 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    TXS0108E: does TXS0108E have weak voltage output or not? If our input signal is just from Low to high and keep the status in high, how is the output level? 0 Locked

    331 views
    3 replies
    Latest over 4 years ago
    by Rami Mooti1
  • Not Answered

    SN74LVC244A: Output is abnormal 0 Locked

    257 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G125: About short circuit between pins of SN74LVC1G125 0 Locked

    269 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LXC8T245: Unused I/O's of SN74LXC8T245 0 Locked

    367 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC2G74-Q1: What is the sample timing of the input high/low 0 Locked

    538 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LS86A: Wave Solder Conditions for SN74LS86A 0 Locked

    386 views
    6 replies
    Latest over 4 years ago
    by Tatsuya Takahashi
  • Suggested Answer

    SN74AVC32T245: IBIS Model Inquiry 0 Locked

    440 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC3G07-Q1: Comparison table between SN74LVC3G07QDCURQ1 & SN74LVC3G07YZPR 0 Locked

    337 views
    1 reply
    Latest over 4 years ago
    by Sebastian Muriel
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