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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

    CD54HC14: Part History 0 Locked

    227 views
    2 replies
    Latest over 3 years ago
    by Matt Charlton
  • Answered

    LSF0102: IBIS Model with 4V VCC 0 Locked

    823 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G125: alternative device 0 Locked

    408 views
    2 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Not Answered

    SN74HC14: The indicator light cannot go off completely 0 Locked

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

    SN74LVC1G14: Use SN74LVC1G14DCK as a positive to negative level shifter/translator 0 Locked

    1875 views
    3 replies
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0104E: Design data for MTBF 0 Locked

    317 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    SN74AXCH8T245: out of stock. So what the impact of replacing SN74AXCH8T245 with SN74LVH8T245 0 Locked

    304 views
    2 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    SN74AXCH8T245: SN74AXC8T245 & SN74AXCH8T245 0 Locked

    427 views
    3 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    SN74LVC2G07: out of input transition rise rate 0 Locked

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

    LSF0204: IBIS Model detail required 0 Locked

    364 views
    2 replies
    Latest over 3 years ago
    by Ayush Awasthi
  • Answered

    SN74LV123A: Is it OK to input voltage higher than the Vcc? 0 Locked

    740 views
    2 replies
    Latest over 3 years ago
    by Ryotaro Fukui
  • Answered

    CD74AC164: Schematic example 0 Locked

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

    SN74AVCB164245: output voltage characteristics(VOH, VOL) 0 Locked

    490 views
    3 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    SN74LVC1G125: SN74LVC1G125(6)DBVR 0 Locked

    736 views
    5 replies
    Latest over 3 years ago
    by Emrys Maier
  • Not Answered

    TXS0102: TXS0102 0 Locked

    763 views
    9 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    TXS0102: IBIS Model detail required 0 Locked

    326 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AHCT125: TA of SN74AHCT125PW 0 Locked

    401 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Not Answered

    SN74AVC4T245: IBIS Model detail required 0 Locked

    217 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AHC240: Input Signal Beyond "min" ABS MAX for <1ns 0 Locked

    215 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G07: product oxidation on the legs 0 Locked

    332 views
    3 replies
    Latest over 3 years ago
    by Emrys Maier
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