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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

    SN74LVC2G04: Need a un-encrypted Pspice model for the SN74LVC2G04 0 Locked

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

    TXB0104-Q1: Can TXB0104QRGYRQ1 be used to implement 3.3V to 5V or 1.8V to 5V automotive-grade SPI level translation 0 Locked

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

    SN74LVC14A Letter Of Volatility Request 0 Locked

    1414 views
    4 replies
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    SN54LS32: RHA numbers/radiation testing 0 Locked

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

    TXS4555: TXS4555 in long trace application 0 Locked

    696 views
    5 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AHCT244-Q1: SN74AHCT244QPWRQ1 0 Locked

    517 views
    2 replies
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    SN74LV244A: About Input Voltage vs Input Current graph 0 Locked

    677 views
    6 replies
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    SN74HC08-Q1: pin 3, pin8, pin11 short to GND 0 Locked

    1230 views
    3 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    CD14538B: Adjusting timing: input current specification for pin 2 RXCX ? 0 Locked

    589 views
    3 replies
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    CD4541B: Example Design 0 Locked

    1705 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0204: Higher push pull resistor 0 Locked

    1022 views
    5 replies
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    CD74HC40105: Input on CD74HC40105E 0 Locked

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

    SN74LVC2G14: Schmitt trigger failure - fault finding assistance 0 Locked

    1528 views
    1 reply
    Latest over 5 years ago
    by Karan Kotadia
  • Suggested Answer

    TXS0108E: VCCa > VCCb 0 Locked

    966 views
    5 replies
    Latest over 5 years ago
    by ShreyasRao
  • Answered

    SN74AUC244: Thermal Pad Connection 0 Locked

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

    SN54LVC74A: What is the threshold voltage, SN54LVC74A will consider high or low on PRE/ and CLR/ Pin ? 0 Locked

    356 views
    1 reply
    Latest over 5 years ago
    by Karan Kotadia
  • Not Answered

    SN74AUP1G57: in2 has a small spikes when power up 0 Locked

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

    TXB0104: Suitable Level Shift 0 Locked

    613 views
    5 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LVC2GU04: About HSPICE of SN74LVC2GU04 0 Locked

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

    SN74AVC2T45: Output Jitter spec 0 Locked

    442 views
    1 reply
    Latest over 5 years ago
    by ShreyasRao
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