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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

    SN74LV74A: Output impedance 0 Locked

    242 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC16T245: Design Review 0 Locked

    366 views
    2 replies
    Latest over 2 years ago
    by user5841077
  • Answered

    SN74AXC4T245-Q1: power on sequence 0 Locked

    257 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74GTL2003: Level translator 0 Locked

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    4 replies
    Latest over 2 years ago
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    SN74AVCH2T45: Measurement Across the Diode 0 Locked

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

    SN74LVC8T245: vs SN74LXC8T245 migration: difference in how inputs behaves? 0 Locked

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

    SN54HC109-SP: SN54HCxxx-SP logic family listed in space products but without radiation hardness levels 0 Locked

    336 views
    2 replies
    Latest over 3 years ago
    by Phil Zercher
  • Answered

    TXB0104: benefit of level shifter 0 Locked

    488 views
    5 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T774: OE to signal delay time spec 0 Locked

    301 views
    2 replies
    Latest over 3 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC1G11-Q1: About FMEDA 0 Locked

    458 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Not Answered

    TXS0102: TXS0102 output Drooping waveform observed for clock (MDIO interface) 0 Locked

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

    TXU0104: Use with quadrature encoder PWM signals at 5V HIGH 0 Locked

    492 views
    6 replies
    Latest over 3 years ago
    by Christopher Buckley
  • Suggested Answer

    SN74LVC244A: looking for MDIO/MDC buffer solution 0 Locked

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

    SN74AHC1G08: Δt/Δv Input transition rise or fall rate 0 Locked

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

    SN74LVC1T45-Q1: Pin setting 0 Locked

    415 views
    4 replies
    Latest over 3 years ago
    by Masakazu Adachi
  • Answered

    SN74AHC14: AHC vs HCS 0 Locked

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

    TXS0108E: Device suggestion for layer 2 switch 0 Locked

    252 views
    1 reply
    Latest over 3 years ago
    by Michael Ikwuyum
  • Answered

    SN74LVC4245A: leak to VccB 0 Locked

    392 views
    4 replies
    Latest over 3 years ago
    by Yusuke Mukuno
  • Suggested Answer

    TXS0206AEVM: How to handle the enable pin of TXS0206AEVM 0 Locked

    262 views
    3 replies
    Latest over 3 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LV393A: Max. frequency at CLK input 0 Locked

    344 views
    2 replies
    Latest over 3 years ago
    by Emrys Maier
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