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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

    CD4040B: SPICE Model 0 Locked

    1228 views
    2 replies
    Latest over 5 years ago
    by Robert Knutson
  • Answered

    2N7001T: How fast can this run? Can it really drive 50mA? 0 Locked

    419 views
    2 replies
    Latest over 5 years ago
    by Ron Breding
  • Suggested Answer

    SN74ALVC164245-EP: IBIS Model 0 Locked

    422 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Not Answered

    TXS0102-Q1: Spike and noise issue 0 Locked

    256 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    TXB0106: What behavior of Pin B1- B6 when no Vcc_B power 0 Locked

    199 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    SN74HC574: SN74HC574 3.3V power supply consult 0 Locked

    455 views
    2 replies
    Latest over 5 years ago
    by Lin_Charles
  • Answered

    SN74HCT139: SN74HCT139DR data code confirm 0 Locked

    409 views
    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AVCH2T45: Default output when input is floating after power-up 0 Locked

    584 views
    6 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    TXB0304: TXB0304 overshot and undershot limit 0 Locked

    448 views
    2 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    TXS0108E-Q1: TXS0108E 0 Locked

    538 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74HCT541: Thermal Information 0 Locked

    402 views
    3 replies
    Latest over 5 years ago
    by Art Mecina
  • Answered

    SN74F541: Pinouts of SN74F541NSR 0 Locked

    241 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    2N7001T: 2N7001T 0 Locked

    309 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LV32A: How much TjMax? 0 Locked

    350 views
    3 replies
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    Need MSL and Thickness Details 0 Locked

    374 views
    1 reply
    Latest over 5 years ago
    by Ed Walker
  • Suggested Answer

    SN74LVTH244A: Difference of suffix 0 Locked

    358 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74AC240: Octal buffer or driver with 3-state output, but TTL input 0 Locked

    447 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    LSF0102: Logic Low level not zero 0 Locked

    1791 views
    5 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN54HC245: Difference between SNJ54HC245J and SN54HC245J 0 Locked

    310 views
    2 replies
    Latest over 5 years ago
    by Art Mecina
  • Suggested Answer

    LSF0108-Q1: TXS0108E 0 Locked

    976 views
    1 reply
    Latest over 5 years ago
    by ShreyasRao
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