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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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  • Suggested Answer

    SN74ABT244A: Unused Inputs 0 Locked

    238 views
    2 replies
    Latest over 1 year ago
    by KJ
  • Suggested Answer

    TXS0108E: Can it be used as bi-directional? 0 Locked

    678 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74LVC2G74-Q1: failure modes and FIT rate data for SN74LVC2G74-Q1 0 Locked

    311 views
    1 reply
    Latest over 1 year ago
    by Owen Westfall
  • Suggested Answer

    SN74LVC1G32-Q1: failure modes and FIT rate data for SN74LVC1G32-Q1 0 Locked

    295 views
    1 reply
    Latest over 1 year ago
    by Owen Westfall
  • Answered

    TXS0102: Inquiry about A-port, B-port related parts including TXS0102 0 Locked

    320 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: LSF0204 offset 0 Locked

    470 views
    7 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74AXC8T245: 0.5V level shift 0 Locked

    541 views
    5 replies
    Latest over 1 year ago
    by Jeff YANG
  • Suggested Answer

    SN74LVC2G14: SN74LVC2G14 VT+ & VT- RANGE in VCC 3V 0 Locked

    302 views
    4 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC595: SN74HC595 failed in CS test 0 Locked

    621 views
    9 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    TXU0104-Q1: Level shift IC showing VCCA and VCCB power leakage 0 Locked

    445 views
    5 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    CD74HCT14: CD74HCT14M Obsolete 0 Locked

    421 views
    1 reply
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    by Clemens Ladisch
  • Suggested Answer

    TXB0304: level shifter with only one shot 0 Locked

    345 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Answered

    SN74LVC1G07: DCK 0 Locked

    402 views
    2 replies
    Latest over 1 year ago
    by Vivian Ojeda
  • Suggested Answer

    LSF0102: B-side voltage 0 Locked

    367 views
    10 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN54AHC157: Inquiry related to military rating 0 Locked

    349 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC2G17: Difference in Propagation Delay Time between Channels 1 and 2 in the Same IC 0 Locked

    493 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74LVC3G17: Thermal Information 0 Locked

    356 views
    4 replies
    Latest over 1 year ago
    by Benedict Goh
  • Suggested Answer

    SN74LVC1G175: Regarding thermal data for the part. 0 Locked

    248 views
    1 reply
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    SN54LVC646A-SP: Package mass 0 Locked

    271 views
    4 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74AUC244: would SN74AUC244 be suitable as MDIO buffer? 0 Locked

    312 views
    3 replies
    Latest over 1 year ago
    by Jack Guan
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