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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

    SN74AHC1G08: Δt/Δv Input transition rise or fall rate 0 Locked

    360 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1T45-Q1: Pin setting 0 Locked

    415 views
    4 replies
    Latest over 3 years ago
    by Masakazu Adachi
  • Answered

    SN74AHC14: AHC vs HCS 0 Locked

    678 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E: Device suggestion for layer 2 switch 0 Locked

    252 views
    1 reply
    Latest over 3 years ago
    by Michael Ikwuyum
  • Answered

    SN74LVC4245A: leak to VccB 0 Locked

    392 views
    4 replies
    Latest over 3 years ago
    by Yusuke Mukuno
  • Suggested Answer

    TXS0206AEVM: How to handle the enable pin of TXS0206AEVM 0 Locked

    266 views
    3 replies
    Latest over 3 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LV393A: Max. frequency at CLK input 0 Locked

    346 views
    2 replies
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    TXB0102: Is TXB0102 suitable for Uart aplication? 0 Locked

    416 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0104:Can it be used by connecting 3 components? 0 Locked

    234 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G08-Q1: Part CTE and PCB CTE 0 Locked

    466 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVCC3245A: Land size, Resist size and Metal Mask opening 0 Locked

    247 views
    1 reply
    Latest over 3 years ago
    by Jack Guan
  • Suggested Answer

    SN74AVC1T45: Schematic review 0 Locked

    616 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0102: Rise time/ Fall time specifications 0 Locked

    435 views
    5 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXU0104: X2SON vs. X2QFN 0 Locked

    383 views
    1 reply
    Latest over 3 years ago
    by Jack Guan
  • Suggested Answer

    LSF0204: Short circuit on design using LS0204 0 Locked

    476 views
    8 replies
    Latest over 3 years ago
    by Michael Ikwuyum
  • Suggested Answer

    TXS0206AEVM: TXS0206AEVM need pull-up resistor 0 Locked

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

    SN74HC164: And BQ34Z100(-g1) high powerconsumption 0 Locked

    500 views
    2 replies
    Latest over 3 years ago
    by Robert Jan Bout
  • Suggested Answer

    TXS0108E-Q1: Technical discussion about TXS0108E-Q1 Open-Drain and Push-Pull design 0 Locked

    773 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHC1G14: clamp diode connected to Vcc instead of ground 0 Locked

    277 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVCC3245A: A value that allows the undershoot and overshoot voltage of VI 0 Locked

    314 views
    2 replies
    Latest over 3 years ago
    by Jack Guan
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