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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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  • Not Answered

    SN74HC594: Fusion 360 spice model files 0 Locked

    450 views
    2 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AHC1G08: (SN74AHC1G08DBVR)Design check 0 Locked

    361 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Not Answered

    TXB0108: Stable driving current 0 Locked

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

    SN74HC109: pin is black 0 Locked

    272 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN54AHCT08-SP: CFP Package 0 Locked

    958 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: Enable voltages at 0.8V VREF_A 0 Locked

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

    CD74HC73: how to reset pin R to initialize Q output low when power on? 0 Locked

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

    SN74LV1T02: PTN3365 0 Locked

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

    SN74LVC1G08: Old Die revision usage 0 Locked

    269 views
    2 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AHCT1G125-Q1: Is this an AEC-Q compliant part? 0 Locked

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

    TXB0108: About TXS0108 output oscillation problem 0 Locked

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

    SN74AHCT1G125-Q1: How to estimate the VIH/VIL spec within the operating range? 0 Locked

    370 views
    2 replies
    Latest over 4 years ago
    by Jay Sun
  • Answered

    LSF0108: Rising edge during the Translating UP 0 Locked

    576 views
    9 replies
    Latest over 4 years ago
    by Ella KIM
  • Suggested Answer

    SN74LVCH8T245: SN74LVCH8T245RHLR 0 Locked

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

    [FAQ] [H] Monostable Multivibrators - Top Questions Answered 0 Locked

    5253 views
    1 reply
    Latest over 4 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74LVC1G11-EP: Pspice model 0 Locked

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

    TXB0106: output(A->B) low level does not reach to 0V 0 Locked

    747 views
    6 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    SN74AVC4T245-Q1: Searching TI solution 0 Locked

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

    SN74LV244A: Output State with Hi-Z Inputs 0 Locked

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

    TXS0102: Input voltage acceptable range for TXS0102DCTR 0 Locked

    171 views
    2 replies
    Latest over 4 years ago
    by Keerthana U R
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