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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

    SN74LVC1G17: Missing Footprint 0 Locked

    598 views
    8 replies
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G74: Need Transient SPICE Model for simulation 0 Locked

    1339 views
    3 replies
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AXC1T45: What is the difference between SN74AVX and SN74AXC series devices? 0 Locked

    1076 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    TXS0108E: VOHA/VOHB specification 0 Locked

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

    SN74LVC1G125-Q1: Iq current requirement 0 Locked

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

    SN74LVC157A: SN74LVC157ARGYR Max Junction Temperature 0 Locked

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

    SN74AXC8T245: VQFN Package Exposed Pad Connection 0 Locked

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

    SN74LVC2G74-Q1: The max pulse current into the output pin 0 Locked

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

    TXB0104: Throughput of TXB0104 & TXB0106 0 Locked

    809 views
    13 replies
    Latest over 2 years ago
    by Binu Raj S
  • Answered

    SN74HC165: GPIO extension for microcontroller in combination with the SN74HC595 0 Locked

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

    SN74HCS244: SN74HCS244 0 Locked

    330 views
    2 replies
    Latest over 2 years ago
    by Elena Faventi
  • Suggested Answer

    SN74HC573A: Outputs going high during power cycle for short duration. 0 Locked

    951 views
    6 replies
    Latest over 2 years ago
    by Omprakash Sankaran
  • Suggested Answer

    SN74LXC1T14: Level translation from IO level to 28V 0 Locked

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

    TXS0102: The difference between TXS0102 and LSF0102 0 Locked

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

    SN74HC373: internal protection for input /output 0 Locked

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

    Compare Discrete Logic Devices Die maps 0 Locked

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

    damaged buffer SN74LVC244ADB 0 Locked

    870 views
    7 replies
    Latest over 2 years ago
    by Elena Faventi
  • Suggested Answer

    SN74HCS165: Doubt about Schmitt trigger VT- input level of the HCS logic family at 3.3V 0 Locked

    436 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Answered

    SN74LXC1T14: hysteresis 0 Locked

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

    SN74LVC1G373: SN74LVC1G373YZPR 0 Locked

    565 views
    6 replies
    Latest over 2 years ago
    by Clemens Ladisch
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