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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

    SN74LV541A: About VOH 0 Locked

    236 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AXC2T245: SN74AXC2T245RSWR material currently has 5800 pieces in stock, with oxidation accounting for about 60%. Please help confirm if there is a way to handle oxidation in order to continue using it in the future. Thank you 0 Locked

    217 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74LV06A: About l Transition Rate specification 0 Locked

    307 views
    5 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Not Answered

    CD74HC4046A: CD74HC4046APWR related issues 0 Locked

    208 views
    1 reply
    Latest over 2 years ago
    by vicente flores prado
  • Suggested Answer

    CD4098B: CD4098B spice model 0 Locked

    483 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74AUP1G74: Wrong symbol 0 Locked

    251 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74AHC1G32: Date rate (MBps) vs Frequency (Hz) 0 Locked

    361 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    TXS0206: SD CARD LEVEL TRANSLATION 0 Locked

    259 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1G74: junction to case thermal resistance 0 Locked

    248 views
    3 replies
    Latest over 2 years ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC8T245-Q1: Decaps requirement 0 Locked

    219 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC2G32-Q1: Decaps requirement 0 Locked

    233 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC125A: OD Configuration 0 Locked

    275 views
    2 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Not Answered

    SN74ALVC164245: SN74ALVC164245 0 Locked

    222 views
    5 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0304: Requesting for Switching frequency of TXB0304RUTR 0 Locked

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

    TXB0108: TXB0108 SDL and SCL issue 0 Locked

    241 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LV244A: The reason why "UPDATE thermal value" from Rev.P datasheet to Rev.Q datasheet. 0 Locked

    197 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS21: SN74HCS21's Thermal Derating 0 Locked

    311 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74LV244AT: P2P replacement 0 Locked

    286 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC14A: The input impedance for SN74LVC14A 0 Locked

    316 views
    4 replies
    Latest over 2 years ago
    by Zhang Liang
  • Answered

    SN74AUP1G08: Package weight 0 Locked

    323 views
    3 replies
    Latest over 2 years ago
    by Hiroaki Yuyama TED
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