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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

    SN74HC595: *** Registers Many Chained 0 Locked

    1174 views
    7 replies
    Latest over 7 years ago
    by Clemens Ladisch
  • Answered

    SN74GTL2003: SREF pin impedance 0 Locked

    878 views
    4 replies
    Latest over 7 years ago
    by Errol Leon6
  • Suggested Answer

    CY74FCT157T: The O/P pins are driven at 2.5V, but Vcc=3.3.V 0 Locked

    1003 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LV4046A: VCO Characteristics 0 Locked

    1668 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AXC8T245: What is guaranteed output skew? 0 Locked

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

    TXS0102: short protection 0 Locked

    779 views
    4 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    SN74AVCH8T245: TPLH / TPHL MIN & MAX value ? 0 Locked

    1289 views
    4 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    TXS0108E: Question about input signal waveform 0 Locked

    673 views
    4 replies
    Latest over 7 years ago
    by Johnny Guo
  • Answered

    TXB0108: GND Level Translation 0 Locked

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

    SN74LVC1G80: Clock Rise Time 0 Locked

    486 views
    4 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    Request for CAHCT1G126QDCKRQ1 feature size (aka process technology) used at die level for this component 0 Locked

    399 views
    2 replies
    Latest over 7 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0104E: input low voltage issue 0 Locked

    740 views
    2 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LVTH16244A: The specs requirement of SN74LVTH16244 0 Locked

    529 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    CD4504B: CD4504B realize 3.3V transfer to 5V 0 Locked

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

    SN74AHCT1G04: Failure Mode 0 Locked

    864 views
    5 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0108: Channel to Channel Skew 0 Locked

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

    SN74LV123A: About unused channel connection 0 Locked

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

    SN74AHC595: IBIS model 0 Locked

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

    SN74AHCT16244: Part Number Defanition 0 Locked

    938 views
    2 replies
    Latest over 7 years ago
    by Andy Moss
  • Answered

    SN74LVC2G74-EP: output when inputs PRE=high, CLR=high, CLK=Low, and D=X 0 Locked

    464 views
    1 reply
    Latest over 7 years ago
    by Wade Vonbergen
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