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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

    SN74AUC1G08: Rise and fall times 0 Locked

    662 views
    4 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74ABT540: SN74ABT540PW still avairable? 0 Locked

    468 views
    1 reply
    Latest over 7 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AVC4T774: SN74AVC4 0 Locked

    614 views
    1 reply
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    SN74HC08-Q1: SN74HC08 VIH & VIL Level at VCC = 5V 0 Locked

    921 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LV123A-Q1: VOH (min) at the condition of Vcc=3.3V, IOH=-70uA 0 Locked

    732 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    LSF0108: IBIS simulation question 0 Locked

    906 views
    3 replies
    Latest over 7 years ago
    by Luke Sun
  • Answered

    SN74LVC07A-Q1: Need Max Operating Junction Temperature 0 Locked

    463 views
    2 replies
    Latest over 7 years ago
    by Gabriel Garza45
  • Suggested Answer

    Fastest level translator above 40 MHz 0 Locked

    677 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0104: Transition point is different when ramping up and rolling down the input signal. 0 Locked

    1473 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G175: output status at startup 0 Locked

    388 views
    1 reply
    Latest over 7 years ago
    by ShreyasRao
  • Answered

    SN74LVC1T45: About input voltage level to Vcc Isolation 0 Locked

    438 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    WEBENCH® Tools/TXB0104: Connection of OE Pin 0 Locked

    2760 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0204: when Vref_A open with pull-down resistor 0 Locked

    941 views
    4 replies
    Latest over 7 years ago
    by Hiroshi Sato
  • Answered

    LMC567: Seeking to find a discriminator that works at audio frequencies 0 Locked

    566 views
    3 replies
    Latest over 7 years ago
    by richard5998
  • Answered

    SN74HC594: Output state when /SRCLR & /RCLR are low 0 Locked

    2266 views
    4 replies
    Latest over 7 years ago
    by Zhou Fang67
  • Suggested Answer

    SN74LV244A: SN74LV244APWRG3 0 Locked

    471 views
    2 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0108E: If we make VCCB to control OE, is it OK? 0 Locked

    1446 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVC8T245: Recommend a suitable level shift for customer 0 Locked

    1144 views
    5 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AVC4T774: SN74AVC4T774 long propagation delays 0 Locked

    920 views
    5 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC8T245: Input data rate 0 Locked

    590 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
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