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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-Q1: vs TXU0304 0 Locked

    234 views
    1 reply
    Latest over 2 years ago
    by Caden Fischer
  • Answered

    SN74AVCA406: MAX Clock speed 0 Locked

    299 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    SN74HCS594: Table 8-1 0 Locked

    289 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Answered

    SN74LV123A: is the part a proper alternative for Nexperia 74HC123 0 Locked

    484 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74LVC2G126: Pull-up resistor on output 0 Locked

    333 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC16245A: SN74LVC16245 vs SN74LVCH16245 0 Locked

    309 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Answered

    SN74AHC244-Q1: TAPE DIMENTIONS 0 Locked

    317 views
    3 replies
    Latest over 2 years ago
    by Albert Xu1
  • Answered

    SN74AHCT244Q: What is a Q device? 0 Locked

    278 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0104-Q1: TXB0104-Q1 RECOMMEND for level shift the directions signal only 0 Locked

    386 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Not Answered

    SN54SLC8T245-SEP: Maximum operating frequency. 0 Locked

    288 views
    3 replies
    Latest over 2 years ago
    by Dan Oliver
  • Suggested Answer

    LSF0101: X2SON DTQ0006A Footprint 0 Locked

    641 views
    10 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74AVC8T245-Q1: internal delamination of the device 0 Locked

    284 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    SN74AVC16T245: The output caused by invalid input logic level 0 Locked

    237 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74HC541: A method to prevent leakage current from being connected from IO to VCC 0 Locked

    270 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Not Answered

    TXB0104-Q1: TXB0104-Q1 circuit problem and current backflow problem 0 Locked

    312 views
    5 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXU0101: Layout guidance results in permanently disabled IC 0 Locked

    224 views
    3 replies
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    SN74LV6T17: SN74LV6T17 - not able to find the land pattern 0 Locked

    245 views
    1 reply
    Latest over 2 years ago
    by Swathi D
  • Answered

    SN74LVC1G123: Is there a version with inverted output? 0 Locked

    400 views
    2 replies
    Latest over 2 years ago
    by user6067694
  • Answered

    SN74HC688: Replace NXP's 74HC688 0 Locked

    317 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LS04: ESD data request 0 Locked

    209 views
    1 reply
    Latest over 2 years ago
    by Malcolm Lyn
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