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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

    SN74LVC2G126: tri-state buffer OE pulldown resistor 0 Locked

    866 views
    1 reply
    Latest over 7 years ago
    by Dylan Hubbard
  • Answered

    LSF0204: Schematic and Layout Verification 0 Locked

    560 views
    6 replies
    Latest over 7 years ago
    by tejaChintalapati
  • Answered

    SN74LVC1G97: Is it a problem if input voltage swing range is 0V-3.3V with 5V VCC for SN74LVC1G97? 0 Locked

    434 views
    2 replies
    Latest over 7 years ago
    by Kazuya Nakai59
  • Suggested Answer

    TXB0101: output have glitch when power on 0 Locked

    1725 views
    9 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    LSF0102: LSF0102 VRef issue 0 Locked

    1276 views
    5 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AUP1G125: OE Thrshold at Vcc = 2.9V 0 Locked

    444 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    TXB0108: TXB0108 Input / Output Direction Detection 0 Locked

    1115 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVC1G123: Minimum retrigger time Rext value 0 Locked

    700 views
    4 replies
    Latest over 7 years ago
    by Dan Andersen
  • Suggested Answer

    SN74GTL1655: Output ringing in the falling edge 0 Locked

    1554 views
    9 replies
    Latest over 7 years ago
    by Lacey Lin
  • Suggested Answer

    TXB0108: Is there any limitation of OE signal rising/falling rate? 0 Locked

    390 views
    1 reply
    Latest over 7 years ago
    by Karan Kotadia
  • Answered

    SN74LVC1G17: Single Schmitt-Trigger Buffer: Input Rise time and fall time specs missing in data sheet 0 Locked

    1778 views
    2 replies
    Latest over 7 years ago
    by Daniel Ka
  • Answered

    SN74LVC1G11: Country of origin SN74LVC1G11DCKR 0 Locked

    544 views
    2 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0106: Voltage Translator with Vcca > Vccb 0 Locked

    891 views
    5 replies
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    CD74HC123: CD74HC123 Application question 0 Locked

    748 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    [FAQ] What is the maximum junction temperature (TJMAX) for a device? 0 Locked

    8448 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    CD4011B: why darker appearance? 0 Locked

    1558 views
    6 replies
    Latest over 7 years ago
    by Anthony Hong
  • Suggested Answer

    SN74LVC1G123: Fast pulse data for CEXT = 100 pF 0 Locked

    686 views
    8 replies
    Latest over 7 years ago
    by SteeVeeDee
  • Suggested Answer

    SN74ACT533: SN74ACT533PWR power dissipation figures & temperature ratings 0 Locked

    380 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0108: why the float level measured at A side is a little higher than vrefA? 0 Locked

    652 views
    4 replies
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LV1T34: Thermal resistance information needed 0 Locked

    350 views
    2 replies
    Latest over 7 years ago
    by ShreyasRao
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