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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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  • Suggested Answer

    SN74LVT244B: About PSPICE model. 0 Locked

    457 views
    2 replies
    Latest over 5 years ago
    by Karan Kotadia
  • Suggested Answer

    SN74LVC16T245: Series Resistors 0 Locked

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

    SN74LVC2G06: Alternative IBIS model 0 Locked

    456 views
    2 replies
    Latest over 5 years ago
    by Art Mecina
  • Answered

    SN74LVC2G07: Please help to share the comment about Vih (Min. 2V) 0 Locked

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

    SN74HC74: regarding PCN 20200629000.1 (Qualification of new Fab site (RFAB) using qualified Process Technology, Die Revision, and additional Assembly site/BOM options for select devices) 0 Locked

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

    TXS0108E: On the previous datasheet, themin VCCA was 1.2V, the reason for the change to 1.4V? 0 Locked

    747 views
    2 replies
    Latest over 5 years ago
    by Emrys Maier
  • Answered

    TXS0108E: Can TXS0108E support 10MHz MDIO signal voltage level shift? 0 Locked

    516 views
    4 replies
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC2T45: SN74LVC2T45 0 Locked

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

    SN54HC04-SP: operating HC04 IC with -5V supply. 0 Locked

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

    TXB0108: Circuit with two TXB0108 connected in series 0 Locked

    733 views
    5 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC2G17-Q1: SC70 package layout 0 Locked

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

    SN74AHCT374: Is there waveform data showing the characteristics of input voltage and consumption current ? 0 Locked

    398 views
    5 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Not Answered

    SN74GTL2014: how to reduce the negative voltage of the SN74GTL2014 0 Locked

    428 views
    7 replies
    Latest over 5 years ago
    by Frank Xiao
  • Suggested Answer

    SN74AXC8T245: Compatibility with Xilinx Zynq Ultrascale FPGA 0 Locked

    1145 views
    8 replies
    Latest over 5 years ago
    by RajK
  • Not Answered

    SN74AHCT541: SN74AHCT541PW output incorrect voltage 0 Locked

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

    SN74LVC1G125: pull up/down resistor for SN74LVC1G125 & SN74LVC1G126 0 Locked

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

    SN74LVC1T45-Q1: Power management forum 0 Locked

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

    SN74LVC245A: what's the highest frequency could be input to SN74LVC245APW? 0 Locked

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

    SN54LVTH245A-SP: Power dissipation calculation -- missing Cpd value 0 Locked

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

    SN74AVCBH164245: Power consumption estimation 0 Locked

    756 views
    11 replies
    Latest over 5 years ago
    by Clemens Ladisch
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