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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

    TXB0108: TXB0108ZXYR vs TXB0108NME 0 Locked

    529 views
    4 replies
    Latest over 4 years ago
    by MK
  • Answered

    SN74LVC2G32-Q1: I can use SN74LVC2G32QDCURQ1 in ADAS systems applications? 0 Locked

    365 views
    2 replies
    Latest over 4 years ago
    by JACOB LEE
  • Suggested Answer

    SN74AC14: Do you have IC for noise filter and debouncing? 0 Locked

    472 views
    5 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G34: Block diagram of SN74LVC1G34 0 Locked

    455 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    SN74AUP3G17: Ioff Voltage Threshold 0 Locked

    442 views
    1 reply
    Latest over 4 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74HCS04: tpd at TA=-40~+125℃ 0 Locked

    389 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    Voltage Level Translator vs Voltage Divider 0 Locked

    1025 views
    2 replies
    Latest over 4 years ago
    by HARI T O1
  • Suggested Answer

    SN74LVC8T245: Auto device recommendation: 2us input signal rise time 0 Locked

    349 views
    3 replies
    Latest over 4 years ago
    by Songzhen Guo
  • Answered

    SN74AUC1G125: Question about xOE fall-time requirement 0 Locked

    510 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    LSF0204: Sinking/sourcing current even when tristated. 0 Locked

    411 views
    3 replies
    Latest over 4 years ago
    by Terry Hendrix
  • Suggested Answer

    LSF0101: Why is 1V changed to 0.95V in the datasheet 0 Locked

    288 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AHCT1G125: Slow ramp up voltage at Vcc 0 Locked

    349 views
    2 replies
    Latest over 4 years ago
    by Chad Crosby
  • Suggested Answer

    SN74LXCH8T245: If 23pin Could Left Floating 0 Locked

    419 views
    4 replies
    Latest over 4 years ago
    by Chad Crosby
  • Suggested Answer

    SN74LVC2G08-Q1: Pin drop replacement for 74HC2G08DC-Q100 ? 0 Locked

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

    SN74ALVCHS162830A: What's the difference between ALVCHS162830AGRE4 and 74ALVCHS162830AGR ? 0 Locked

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

    TXB0108: TXB0108 on Nvidia Jetson SPI ports 0 Locked

    894 views
    5 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74AXC1T45-Q1: Schematic review request 0 Locked

    694 views
    2 replies
    Latest over 4 years ago
    by DY Ko
  • Answered

    SN74AXC8T245: channel to channel tpd tolerance 0 Locked

    318 views
    4 replies
    Latest over 4 years ago
    by Wiky Liao
  • Suggested Answer

    TXS0104E: schematic review 0 Locked

    955 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G175: Level Triggered vs Edge Triggered 0 Locked

    712 views
    1 reply
    Latest over 4 years ago
    by Chad Crosby
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