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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 do I configure a monostable multivibrator's inputs for rising/falling edge triggering?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Logic function table for the SN74LVC1G123 Most monostable multivibrator (MMV) devices have very similar logic tables to…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] With Open-Drain outputs, can I ...use them to shift a logic voltage level? ...connect the outputs directly together? ...force a voltage node to zero?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ The answer to all three questions is "yes" - these are the three primary uses of open-drain outputs on logic devices. Much of this also…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] Can I connect the Cext pin to ground on a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A , SN74LVC1G123 , SN74LV123A , SN74221 , SN74LS221 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ For the majority of MMV devices, y es, the Cext pin can be grounded. The Cext…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do you determine the output pulse width and the 'K' value for a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The output pulse width (tw) is determined with the following equation: tw = K * R * C with R := external timing resistor, C := external timing capacitor, K := timing constant…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do I terminate an unused channel of a monostable multivibrator (one shot)?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Unused channels for a logic monostable multivibrator (MMV) such as the SN74LV221A should be terminated such that: (1) All inputs…
    • over 5 years ago
    • Logic
    • Logic forum
  • [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
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  • Answered

    SN74AVCH4T245: SN74AVCH4T245 0 Locked

    301 views
    3 replies
    Latest over 3 years ago
    by Doris Bello
  • Suggested Answer

    SN74LVC2T45-EP: Why ΔICC is more than ICCA + ICCB 0 Locked

    354 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    confirm Alternate part PTP function 0 Locked

    231 views
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    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0108: TXB0108DQS 0 Locked

    185 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    SN74AVC2T45: Channel skew 0 Locked

    278 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Not Answered

    SN74HC595: When it is working, the MCU is suddenly powered off, and the output status of SN74HC595 0 Locked

    293 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E: Low—level input range 0 Locked

    244 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

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    330 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

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

    SN74HCS72: latching circuit for watchdog timer 0 Locked

    904 views
    2 replies
    Latest over 3 years ago
    by Kelvin Le THS
  • Answered

    CD4541B: Can send Spice model per component CD4541B. 0 Locked

    534 views
    3 replies
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    TXB0104-Q1: VCCA<VCCB 0 Locked

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

    SN74HC14: VOL @VCC=5V 0 Locked

    288 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC1G240: SN74AUC1G240 input signal frequency 0 Locked

    203 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74ALVC244: About the penetration current of SN74ALVC244 0 Locked

    287 views
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    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    TXS0104E: Pull Down Required? 0 Locked

    413 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G19: Delay matching A to Y1 & Y2 0 Locked

    415 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    CD4027B: CD4027BNSR ESD(HBM/CDM)SPEC 0 Locked

    347 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74AXC8T245-Q1: What is the max data rates for 1V8 to 1V8? 0 Locked

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

    LSF0108: Looking for good IC selection to send PWM signals to motors. LSF doesn't seem to be working. 0 Locked

    1957 views
    11 replies
    Latest over 3 years ago
    by Emrys Maier
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