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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

    TXS0108E: TXS0108E output issue - output pins not consistent in level shifting 0 Locked

    4624 views
    7 replies
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    SN74AUP3G14: Input transition rise or fall rate 0 Locked

    1616 views
    4 replies
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    SN74AUP1G06: Output Leakage Current, SN74AUP1G06 0 Locked

    1264 views
    5 replies
    Latest over 8 years ago
    by Sornam Viswanathan V
  • Answered

    SN74ALVC164245: Placement of decoupling capacitors 0 Locked

    646 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Answered

    LSF0108: tps386000 and lsf0108 pull up resistor issue 0 Locked

    1441 views
    4 replies
    Latest over 8 years ago
    by user1359349
  • Suggested Answer

    CD4044B: Vih for 3.3V supply operation 0 Locked

    932 views
    2 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74HC573AQDWRQ1 The output (Q) will have an indefinite output 0 Locked

    728 views
    2 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0108: One-shot circuitry and short input pulses 0 Locked

    5547 views
    12 replies
    Latest over 8 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LVC244A: about SN74LVC244 Ioff 0 Locked

    949 views
    2 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVTH16245A: Looking for the land pattern to the SN74LVTH16245ADGVR 0 Locked

    870 views
    3 replies
    Latest over 8 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LV244A: Δt/Δv 0 Locked

    584 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC1G17: SN74AUC1G17 output 0 Locked

    684 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Not Answered

    CD4077B: does CD4077B support 3.3V power supply? 0 Locked

    1021 views
    2 replies
    Latest over 8 years ago
    by Emrys Maier
  • Not Answered

    CD4077B: what's the difference of NOR Gate and Exclusive NOR gate? 0 Locked

    1416 views
    3 replies
    Latest over 8 years ago
    by Max Han
  • Suggested Answer

    TXS0104E: Rds(on) of TXS0104 in low level output 0 Locked

    3297 views
    10 replies
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHC1G04: VIH(min) and VOH(min) with 3.3V Vcc 0 Locked

    774 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC373A: Is output state knowable during power-up with /OE = L, LE = L, D = H? 0 Locked

    772 views
    2 replies
    Latest over 8 years ago
    by Jonathan Bender
  • Answered

    SN74LVC8T245: Maximum operating Speed of level shifter from 3.3V to 1.8V 0 Locked

    1177 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Answered

    SN74AUP1G57: what's the difference between 1t and 1g devices 0 Locked

    938 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC244A: the abs. minimum input negative AC voltage 0 Locked

    739 views
    1 reply
    Latest over 8 years ago
    by Emrys Maier
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