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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

    SN74AHC1G00: input voltage vs. supply current for 74AHC1G* / 74AHCT1G*? 0 Locked

    823 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74AHC1G32: Schmitt-Trigger Action 0 Locked

    655 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G04: Trigger level problem 0 Locked

    477 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    LSF0102: Support MDC need pull-up resistor or not 0 Locked

    2706 views
    3 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    SN74LVC1G123: Equation I could use to calculate R(ext) and C(ext) based on a specific pulse duration 0 Locked

    502 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    CD4099B: CD4099BF & CD4099BF3A 0 Locked

    576 views
    1 reply
    Latest over 7 years ago
    by Wade Vonbergen
  • Suggested Answer

    TXB0104-Q1: Internal pullup or pulldown 0 Locked

    712 views
    1 reply
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    SN74LV74A: Continuous output current in case of short time rating(10ms~50ms) 0 Locked

    465 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVC125A: Power Supply Sequencing and the Output Pins 0 Locked

    469 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0106: TXB0106 0 Locked

    669 views
    3 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    LSF0102: LSF0102 and TXS0102 major difference? 0 Locked

    993 views
    3 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    Hardware break points understanding 0 Locked

    389 views
    2 replies
    Latest over 7 years ago
    by LeonardEllis
  • Suggested Answer

    SN74LVC125A: channel isolation 0 Locked

    1391 views
    9 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    TXB0101: TXB0101 Pull up Resistor 0 Locked

    990 views
    6 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    LM567C: LM567 - frequency stability 0 Locked

    3533 views
    16 replies
    Latest over 7 years ago
    by Simon Damphousse
  • Suggested Answer

    TXB0104: Power down of one side of the translator 0 Locked

    700 views
    4 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    TXS0202: Compatibility with regular USB / alternatives 0 Locked

    1140 views
    6 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    TXS0108E: PCB trace capacitive loading 0 Locked

    688 views
    3 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    SN74HCT273: SN74HCT273 0 Locked

    665 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVC1G126: SN74LVC1G126 / Output state at less than 1.65V 0 Locked

    579 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
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