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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] Is it necessary to have pull-down( or pullup) resistor on the OE pin or can I connect it directly to TXS/ TXB supply?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ The OE ( output enable) is over voltage tolerant, high input impedance, active high enable pin for most of the TXS, TXB devices. If the IOs must be in high impedance during power…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] Can I connect the OE pin to Vccb supply pin instead of Vcca for TXS, TXB devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ The OE ( output enable) is active high CMOS high input impedance pin for most of the TXS and TXB devices. The OE is referenced to Vcca supply w.r.t the voltage levels. i.e The Vih…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the maximum output pulse length for a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ There is no official maximum output pulse length for a monostable multivibrator device, but there are practical limits. The…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How stable is the output pulse length of a monostable multivibrator across changes in supply voltage?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ This plot is from the SN74LVC1G123 datasheet. You can see that the "K" value decreases as the supply increases, but it also…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How stable is the output pulse length of a monostable multivibrator across temperature?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The application report Designing with the SN74LVC1G123 Monostable Multivibrator has some useful information regarding this. Essentially, the timing is primarily determined…
    • over 5 years ago
    • Logic
    • Logic forum
  • [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
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  • Answered

    SN74AUC16245: Fast bus switching or selection in a 1v8 to 3v6 system 0 Locked

    358 views
    6 replies
    Latest over 1 year ago
    by Bill Kury
  • Answered

    SN74LVC1G123: Retrigger time requirement/calculation 0 Locked

    394 views
    5 replies
    Latest over 1 year ago
    by Ian Graham
  • Answered

    TXU0104: Control the power supplies asynchronous 0 Locked

    195 views
    1 reply
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    by Clemens Ladisch
  • Suggested Answer

    CD74AC138: Part recomendation wanted for demuxing SPI CS 0 Locked

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    SN74LVC8T245: Power supply requirements 0 Locked

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    SN74LVC244A: Delay Variation Issue 0 Locked

    487 views
    11 replies
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    by Malcolm Lyn
  • Suggested Answer

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    279 views
    2 replies
    Latest over 1 year ago
    by Michael Marinello
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    199 views
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    SN74LV1T34: SN74LV1T34DBVR 0 Locked

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    TXB0108: TXB0108PWR 0 Locked

    263 views
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    SN74AXCH8T245: SN74AXCH8T245RHLR Max. IO toggling speed 0 Locked

    274 views
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    Latest over 1 year ago
    by Blessing Selvakumar
  • Answered

    SN74ALS245A: differences between SN74ALS245A-1DBR and SN74ALS245ADBR 0 Locked

    277 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC244: Bi-directional buffer 0 Locked

    434 views
    3 replies
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    by Malcolm Lyn
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    CD74HC541: IBIS Model 0 Locked

    258 views
    1 reply
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    SN74LVC14A: marking rule 0 Locked

    339 views
    7 replies
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    by Malcolm Lyn
  • Not Answered

    SN74HC595: Is it normal for the chip without logo? 0 Locked

    329 views
    5 replies
    Latest over 1 year ago
    by Owen Westfall
  • Suggested Answer

    LSF0204: LSF0204 vs LSF0204D 0 Locked

    293 views
    2 replies
    Latest over 1 year ago
    by Jonathan Navor
  • Suggested Answer

    SN74LVC2G02: |tPLH-tPHL| question 0 Locked

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