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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

    TXS0108E-Q1: About pull-up resistor 0 Locked

    761 views
    8 replies
    Latest over 6 years ago
    by Koji Hayashi92
  • Not Answered

    SN74ACT14: How fast can these things toggle? I'm Having's problems with a 500kHz switch circuit. 0 Locked

    1742 views
    11 replies
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0104E: clock signal drop compensation 0 Locked

    381 views
    2 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74HC541: Output current 0 Locked

    458 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74AC373: output H before LE enables when start up 0 Locked

    479 views
    5 replies
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74HC14: Supply Current vs Input Voltage 0 Locked

    397 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVTH245A: θ junction-to-case needed for three part numbers 0 Locked

    451 views
    2 replies
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74ALVC04: THERMAL RESISTANCE VALUES NEEDED 0 Locked

    597 views
    6 replies
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74AVCH20T245: Is it possible to have a different direction for half of the ports of the device? 0 Locked

    372 views
    2 replies
    Latest over 6 years ago
    by Stephane Mouton
  • Answered

    TXB0106: Correct Solution for Quad SPI application 0 Locked

    1119 views
    2 replies
    Latest over 6 years ago
    by Jim CHEN
  • Answered

    SN74LVT125-EP: Tjc 0 Locked

    455 views
    3 replies
    Latest over 6 years ago
    by Wade Vonbergen
  • Suggested Answer

    SN74LVTH125: Thermal Metrics and maximum junction temperature for SN74LVTH125DGV 0 Locked

    422 views
    2 replies
    Latest over 6 years ago
    by Dylan Hubbard
  • Answered

    plc help 0 Locked

    441 views
    3 replies
    Latest over 6 years ago
    by LeonardEllis
  • Suggested Answer

    LSF0204: SPI Speed and Voltage 0 Locked

    1157 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    Segment LED driving using shift Register SN74HC595DR 0 Locked

    497 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AHCT125-Q1: VOH -IOH , VOL - IOL 0 Locked

    856 views
    2 replies
    Latest over 6 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVCA406E: Restriction of Vcca and Vccb of SN74AVCA406E 0 Locked

    535 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    SN74AXCH8T245: Power up 0 Locked

    470 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    SN54HC14: Question about Orderable Device p/n 0 Locked

    448 views
    4 replies
    Latest over 6 years ago
    by Stefano Scremin
  • Suggested Answer

    TXS0108E: Voltage Level 0 Locked

    256 views
    1 reply
    Latest over 6 years ago
    by ShreyasRao
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