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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

    CD4050B: On power down, the output goes high momentarily 0 Locked

    401 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    CD74HC4046A: Help defining resistors and capacitors for CD74HC4046AE PLL +1 Locked

    2500 views
    15 replies
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74LVC1G125: drive capacity 0 Locked

    342 views
    2 replies
    Latest over 4 years ago
    by Rami Mooti1
  • Answered

    LSF0102: A glitch during power up 0 Locked

    771 views
    8 replies
    Latest over 4 years ago
    by Vincent Chen64988
  • Answered

    LSF0204: 3.3V to 1.8V UART bi-directional level translation 0 Locked

    1741 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Not Answered

    need help for level shift promotion 0 Locked

    213 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC244A: SN74LVC/SN74CBT/LSF 0 Locked

    1540 views
    10 replies
    Latest over 4 years ago
    by Bryan Marshall
  • Suggested Answer

    SN74ALVC08-Q1: Tdp and data rate 0 Locked

    334 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74AHC1G126-EP: Output state until minimum VCC reaches during power up 0 Locked

    307 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74AUC125: Skew data 0 Locked

    294 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74LV4T125: Power consumption for SN74LV4T125PWR 0 Locked

    287 views
    3 replies
    Latest over 4 years ago
    by Dylan Hubbard
  • Not Answered

    SN74LVC1G123: IEC 60747-8 0 Locked

    210 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74HC165: Interfacing IC SN74HC165D with dspic33 uC 0 Locked

    382 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    TXS0102-Q1: Internal 10K pull-up resistors 0 Locked

    537 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN54AC14: Question regarding different Inverter Schmitt Triggers - RUAG Space 0 Locked

    375 views
    2 replies
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    SN74AUP1G34: Input Hysteresis 0 Locked

    430 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0102: Vref_A minimum threshold voltage for 0.95V input 0 Locked

    308 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    SN74AHC123A: Tw Design calculation and Observed output is not matching 0 Locked

    426 views
    2 replies
    Latest over 4 years ago
    by Sandeep NS
  • Answered

    TXB0104: current driving capacity 0 Locked

    307 views
    4 replies
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    SN74LV245A: Maximum Input signal of SN74LV245APWR 0 Locked

    277 views
    2 replies
    Latest over 4 years ago
    by Yuto Kitamura
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