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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

    SN74LVCH8T245: Bus Hold Function 0 Locked

    566 views
    2 replies
    Latest over 5 years ago
    by AP
  • Suggested Answer

    SN74LVC1G125: SN74LVC1G125GCKR Application Question 0 Locked

    276 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC3G14: PLEASE TELL ME THE DIFFERENCE BETWEEN"SN74LVC3G14DCU3" AND "SN74LVC3G14DCUR". 0 Locked

    494 views
    2 replies
    Latest over 5 years ago
    by Toshihiro Koizumi1
  • Not Answered

    TXB0108: functional issue with 8-Channel TXB0108 device 0 Locked

    562 views
    17 replies
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    CD4043B: Initial output on start up if both inputs are low 0 Locked

    379 views
    2 replies
    Latest over 5 years ago
    by Danilo A.
  • Suggested Answer

    TXS0108E: Revision code of the TXS0108EPWR 0 Locked

    371 views
    2 replies
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN74LVC1G07: SN74LVC1G07DCKR details 0 Locked

    303 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN74AVC4T774: Maximum operating junction temperature. 0 Locked

    293 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    SN74AUC1G04: Maximum operating junction temperature. 0 Locked

    325 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC2G07: DC I/O level clarification 0 Locked

    293 views
    2 replies
    Latest over 5 years ago
    by Albert Xu1
  • Answered

    SN54LVTH16244A: Internal ESD Protection 0 Locked

    373 views
    2 replies
    Latest over 5 years ago
    by Emrys Maier
  • Not Answered

    TXB0108: outpuy PortB sometimes can't be pull down. 0 Locked

    286 views
    2 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74LVCH8T245: Delay time calculation 0 Locked

    641 views
    8 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G126: Problem: The simulation results of thi-state gate are not correct, the result about high resistance state are same with an AND gate. 0 Locked

    2282 views
    8 replies
    Latest over 5 years ago
    by Nu Pu
  • Answered

    TXB0102: Design Review for TXB0102 and TXS0102 0 Locked

    1576 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T774: Use case question 0 Locked

    200 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC3G07-Q1: PCB designed with Input and Output flipped. Requesting help finding an option to replace on current PCB. 0 Locked

    355 views
    2 replies
    Latest over 5 years ago
    by Anvit Garg
  • Answered

    SN74LVC1G17: buffer device with 1. live insertion 2.delay time <0.5ns 3.differential input & output(optional) 0 Locked

    317 views
    1 reply
    Latest over 5 years ago
    by Albert Xu1
  • Suggested Answer

    SN74HC595: Operation when OE pin is OPEN 0 Locked

    328 views
    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC07A: Device Recommendation 0 Locked

    238 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
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