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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

    LSF0102-Q1: - 0 Locked

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

    SN74AC04: IOH Questions 0 Locked

    456 views
    1 reply
    Latest over 5 years ago
    by Karan Kotadia
  • Suggested Answer

    SN74AVC4T774: IBIS model - No “Series Pin Mapping” and “Series model” 0 Locked

    1210 views
    3 replies
    Latest over 5 years ago
    by Karan Kotadia
  • Answered

    SN74LVC1T45-Q1: Bidirectional translator 0 Locked

    565 views
    4 replies
    Latest over 5 years ago
    by Rongpeng Zhai
  • Answered

    SN74LVC245A: rise and fall times of output 0 Locked

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

    SN74LVC07A: SN74LVC07ARGY QFN pad internal connection 0 Locked

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

    CD74HC4050: IC failure issue. 0 Locked

    1179 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74AUP2G17: SN74AUP2G17DCKR and SN74AUP3G17DCUR 0 Locked

    648 views
    4 replies
    Latest over 5 years ago
    by Kento Sato
  • Suggested Answer

    SN74123: SN74123: Changing Output from Dual Retrigg. Monostable Multivibrator w/ Reset 0 Locked

    1306 views
    9 replies
    Latest over 5 years ago
    by Karan Kotadia
  • Answered

    CD74HC4514: Latch Enable and Output Enable 0 Locked

    1810 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74AHC74Q-Q1: Process technology and number of transistor count 0 Locked

    349 views
    1 reply
    Latest over 5 years ago
    by Karan Kotadia
  • Suggested Answer

    SN74LVC2T45: difference between SN74LVC2T45DCTRE4 and SN74LVC2T45DCTR 0 Locked

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

    SN54LVCH244A: Confirm the small square orientation mark near pin 1 of SNJ54LVCH244AFK 0 Locked

    549 views
    4 replies
    Latest over 5 years ago
    by Jonathan Geronga
  • Answered

    SN74AHC1G86: The input protection circuit (ESD diode) characteristic on SN74AHC1G86 0 Locked

    1009 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    LSF0108: Incorrect pull-up voltage at Vref_b side 0 Locked

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

    LSF0108: EN pin capacitor 0 Locked

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

    TXS0206A: Use with SD Card in SPI mode. 0 Locked

    1107 views
    3 replies
    Latest over 5 years ago
    by Karan Kotadia
  • Suggested Answer

    SN74LS273: Voltage waveforms 0 Locked

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

    TXB0108: TOP MARKING QUERY ON TXB0108 0 Locked

    380 views
    4 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74AVC4T245: VCC isolation 0 Locked

    541 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
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