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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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  • Not Answered

    TXB0104: S-Parameter 0 Locked

    118 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Not Answered

    TXS0108E: TXS0108E LSF0108 hot swap question 0 Locked

    241 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    CD4504B: New Generation Parts Consult 0 Locked

    270 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Answered

    SN74LVC2G06: Connection question 0 Locked

    493 views
    3 replies
    Latest over 5 years ago
    by Asaf Abraham
  • Suggested Answer

    SN74AHCT244: Pin to pin with SN74AHCT244PWR, and low drive capability 0 Locked

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

    TXB0101: Input Voltage Specification 0 Locked

    387 views
    4 replies
    Latest over 5 years ago
    by user5286503
  • Answered

    [FAQ] Can you pull-up an open-drain output to a higher voltage than the device's supply (VCC) voltage? 0 Locked

    4743 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    SN5432: SN5432 0 Locked

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

    SN74LS08: sn74ls08 0 Locked

    470 views
    6 replies
    Latest over 5 years ago
    by Narendra allu
  • Not Answered

    CD4048B-MIL: Cd4048B 0 Locked

    200 views
    1 reply
    Latest over 5 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74LS08: Sn54ls08 0 Locked

    389 views
    2 replies
    Latest over 5 years ago
    by Michael J Schultis
  • Answered

    TXS0206: Data rate vs. clock frequency 0 Locked

    1307 views
    2 replies
    Latest over 5 years ago
    by Alex Kucherov
  • Suggested Answer

    CD4081B-MIL: CD4081B-MIL 0 Locked

    451 views
    1 reply
    Latest over 5 years ago
    by Michael J Schultis
  • Suggested Answer

    [FAQ] [H] Input Parameters 0 Locked

    4693 views
    1 reply
    Latest over 5 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74LVCC3245A: Any restriction OE and DIR signal 0 Locked

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

    LSF0108: what is the recommended R value with variable VCCB? 0 Locked

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

    SN74LVC541A-Q1: Latch-up Performance 0 Locked

    652 views
    6 replies
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0108E: Question for TXS0108E BGA Packages 0 Locked

    663 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC2G74: Quick question for SN74LVC2G74 application. 0 Locked

    629 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    TXB0108: TXB0108RGYR 0 Locked

    278 views
    2 replies
    Latest over 5 years ago
    by Elamurugan Palanisamy
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