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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

    SN74AXC2T245: Internal pull-down resistor value 0 Locked

    173 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74AXC4T774: NCSI check 0 Locked

    179 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC2G74-Q1: 500V HBM ESD test 0 Locked

    415 views
    6 replies
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    SN74LVC1G17: Package Marking 0 Locked

    414 views
    6 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC125A: SN74LVC125APW 0 Locked

    306 views
    3 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN54SC4T125-SEP: Min/Max rise and fall times for 5V supply 0 Locked

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

    SN74HCS164: SN74HCS164DR Kindly share the Maximum reflow cycle for the above part 0 Locked

    244 views
    1 reply
    Latest over 1 year ago
    by Ian Graham
  • Suggested Answer

    TXB0104-Q1: Package Inquiry 0 Locked

    248 views
    2 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    TXU0102-Q1: I/O level by supply voltage 0 Locked

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

    TXS0104E: TXS0104E 0 Locked

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

    TXS0101: Request for proposals for alternatives that do not have internal pull-ups 0 Locked

    278 views
    2 replies
    Latest over 1 year ago
    by Masaki Takeuchi
  • Suggested Answer

    SN74LVC1G74: SN74LVC1G74DCUR vs SN74LVC2G74DCUR 0 Locked

    305 views
    2 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC126A: Check the footprint info 0 Locked

    500 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Answered

    TXS0101: Request for proposals of alternatives that do not have internal pull-ups. 0 Locked

    326 views
    2 replies
    Latest over 1 year ago
    by Masaki Takeuchi
  • Suggested Answer

    SN54LVTH245A: IBIS model 0 Locked

    307 views
    3 replies
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    SN54SC6T17-SEP: Single Event Transient Characterization 0 Locked

    272 views
    2 replies
    Latest over 1 year ago
    by Matthew Joplin
  • Not Answered

    TXS0108E: sleep mode work abnormal 0 Locked

    235 views
    2 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74HCS541: Inverting Option? 0 Locked

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

    SN74AVC4T245: SN74AVC4T245RSVR with 1.2V 0 Locked

    244 views
    2 replies
    Latest over 1 year ago
    by Joshua Salinas
  • Answered

    SN74LVC1G32-Q1: Input transition rise/fall time 0 Locked

    343 views
    2 replies
    Latest over 1 year ago
    by Michael Daimer
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