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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

    TXU0304: TXU0304 0 Locked

    396 views
    4 replies
    Latest over 1 year ago
    by Manmohan garg
  • Answered

    TXB0108: how can we use both 8-ch simulation in IBIS model? +1 Locked

    616 views
    7 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74LVC16T245: questions about datasheet section 10.1.1 0 Locked

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

    LSF0102: Use LSF0102 for IO level shifting between 1.2V and 1.8V. 0 Locked

    792 views
    7 replies
    Latest over 1 year ago
    by Jack Guan
  • Answered

    TXV0106: More datasheet issues. 0 Locked

    337 views
    3 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    LSF0108: Push Pull Driver into A1 with Voltage higher than VREF_A 0 Locked

    258 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G17: Slow input rise and fall time spec 0 Locked

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

    SN74HC540: Query regarding direct substitute part 0 Locked

    304 views
    2 replies
    Latest over 1 year ago
    by Nitesh Bhurke
  • Suggested Answer

    SN74LVC1G74: Project schematic review 0 Locked

    253 views
    3 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Not Answered

    SN74AHCT541: while OE1 is high, OE2 is low, why output signal changes its state 0 Locked

    862 views
    16 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVTH125: SN74LVTH125 for 1 pulse per second 3.3V LVTTL 50 ohm load drive compatibility 0 Locked

    598 views
    4 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    CD74HC393: RFQ SUPPORT 0 Locked

    242 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E-Q1: Level Shifting not sitting at 0 when no input 0 Locked

    333 views
    2 replies
    Latest over 1 year ago
    by Jack Guan
  • Answered

    SN74LVCH8T245: Pulse Rise/Fall Time 0 Locked

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

    TXS0108E:level shifter 5v to 3.3V 0 Locked

    742 views
    3 replies
    Latest over 1 year ago
    by francesc riera vidal
  • Answered

    LSF0101: Capacitor on Vref_A? 0 Locked

    228 views
    2 replies
    Latest over 1 year ago
    by Zach Kimble
  • Suggested Answer

    TXB0108: VCCB ON/OFF 0 Locked

    297 views
    4 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74HCS125: SN74HCS125 0 Locked

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

    SN54SC4T125-SEP: Level translation 0 Locked

    242 views
    2 replies
    Latest over 1 year ago
    by Javier Guevara
  • Suggested Answer

    TXV0106: skew for Vcca=1.2V and switching char. for Vcca=3.3V 0 Locked

    301 views
    5 replies
    Latest over 1 year ago
    by Michael Ikwuyum
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