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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

    SN74LVC14A: Vcc=5V (Figure4) 0 Locked

    636 views
    3 replies
    Latest over 8 years ago
    by cafain
  • Not Answered

    SN74AVC4T774: SN74AVC4T774 0 Locked

    531 views
    1 reply
    Latest over 8 years ago
    by aozer
  • Suggested Answer

    SN74LVC2G08: Land Pattern for DCT (R-PDSO-G8) 0 Locked

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    Latest over 8 years ago
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  • Answered

    CD4046B: CD4046B VCO calculation problem 0 Locked

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    Latest over 8 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74LV1T125: Level Translation for PWM 0 Locked

    2281 views
    3 replies
    Latest over 8 years ago
    by Clemens Ladisch
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    SN74AVC32T245: Output impedance, DOC circuit 0 Locked

    925 views
    5 replies
    Latest over 8 years ago
    by Ryuji
  • Answered

    SN74LVC1G38: Difference between SN74LVC1G38 and 2G38 0 Locked

    827 views
    2 replies
    Latest over 8 years ago
    by Takumi Suzuki1
  • Suggested Answer

    SN74LVC3G07: Temperature for SN74LVC3G07DCUR 0 Locked

    612 views
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    by Emrys Maier
  • Suggested Answer

    SN74LVC1G123: pulse transition timing of INPUT pins 0 Locked

    912 views
    7 replies
    Latest over 8 years ago
    by Shinichi Inoue
  • Suggested Answer

    CD74HC08: failure modes 0 Locked

    522 views
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    Incorrect parametric search values in error 0 Locked

    3618 views
    24 replies
    Latest over 8 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC32A: Tjmax spec 0 Locked

    768 views
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    by Emrys Maier
  • Suggested Answer

    SN74AUP1G74: SN74AUP1G74 used for frequency divider 0 Locked

    719 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC14A: Voltage range applied to any output in the high-impedance or power-off stat 0 Locked

    1101 views
    1 reply
    Latest over 8 years ago
    by Clemens Ladisch
  • Suggested Answer

    CD40106B: Use an open collector to trigger 12V inputs to 5V outputs 0 Locked

    1358 views
    1 reply
    Latest over 8 years ago
    by Michael J Schultis
  • Not Answered

    SN74LV123A: Tw(Output Pulse Duration) at Ta= -30C ->0C -> 25C 0 Locked

    783 views
    1 reply
    Latest over 8 years ago
    by ShreyasRao
  • Suggested Answer

    TXB0108: How to detect the direction 0 Locked

    647 views
    1 reply
    Latest over 8 years ago
    by aozer
  • Suggested Answer

    TXS0206: TXS0206 0 Locked

    679 views
    2 replies
    Latest over 8 years ago
    by aozer
  • Answered

    TXB0108: Clarification on OE input voltage levels 0 Locked

    548 views
    1 reply
    Latest over 8 years ago
    by aozer
  • Answered

    SN74LVC125A-Q1: max Cpd value of SN74LVC125A-Q1 0 Locked

    789 views
    4 replies
    Latest over 8 years ago
    by tsuyoshi tokumoto
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