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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

    voltage divider instead of translator 0 Locked

    1028 views
    4 replies
    Latest over 5 years ago
    by POTHIRAJAN KANDASAMY
  • Answered

    SN74LVC1G17: Will level shifting 1.8V 50Mhz clock to 3.3V stable? 0 Locked

    1229 views
    3 replies
    Latest over 5 years ago
    by Brian Han1
  • Suggested Answer

    LSF0102: Vref_A and Vref_B voltage selection 0 Locked

    452 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    CD4021B: Looking for a model/subcircuit 0 Locked

    319 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    SN74LVC3G17: RθJC(junction-to-case thermal resistance)specification 0 Locked

    379 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC1G34: Source and sink current 0 Locked

    304 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0108: Query on Thermal Pad 0 Locked

    239 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LV595A: Output Pulled Up to 3V3 While VCC = 0V 0 Locked

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

    SN74LVC32373A: SN74LVC32373AZKER Substrate CTE Young's modulus 0 Locked

    353 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74AUP2G126: System with Vcc = 0 with 1OE and 2OE still supplying voltage 0 Locked

    439 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC16T245: tPD change according to temperature 0 Locked

    343 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    SN74LVC2G07: Two Output Currents? 0 Locked

    436 views
    6 replies
    Latest over 5 years ago
    by Emrys Maier
  • Answered

    SN74HC138: Difference between SN74HC138A 0 Locked

    661 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVCH32373A: What's the operating and standby current value? 0 Locked

    409 views
    6 replies
    Latest over 5 years ago
    by Michael Jeong1
  • Answered

    LSF0101: Voltage translators in series 0 Locked

    332 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Not Answered

    SN74ALS541: When 74ALS541 is not powered, can applying 3.4V (less than absolute maximum ratings) to output pin, will this cause any damage to this device? 0 Locked

    226 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AXC8T245: Level shifter for Gigabit RGMII lines running @ 125MHz DDR rate 0 Locked

    1354 views
    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74LVC8T245: Max buad rate: CLVC8T245MRHLTEP 0 Locked

    229 views
    2 replies
    Latest over 5 years ago
    by Javier
  • Suggested Answer

    Buffer 0 Locked

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

    SN74AVC2T245: IBIS model capacitance simulation 0 Locked

    507 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
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