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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

    SN74LS640: About AC characteristic 0 Locked

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

    SN74AXC1T45: PSPICE model / current consumption 0 Locked

    469 views
    4 replies
    Latest over 3 years ago
    by Jan Witte
  • Suggested Answer

    SN74AHC574: OUTPUT waveform unstable and there is not CLKOUT 0 Locked

    878 views
    15 replies
    Latest over 3 years ago
    by Hanmin Zhang
  • Answered

    SN74HC153: SN74HC153NSR:ESD data request 0 Locked

    322 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74AVC4T234: Maximum data rate at 1.2V / 80 MHz clock and 160 Mbps DDR data rate 0 Locked

    868 views
    4 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Not Answered

    SN74AUP1T08: Can they use SN74AUP1G08 instead? 0 Locked

    310 views
    2 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    CD4046B: Multiplication circuit to be locked on a range of frequencies from 47 Hz to 63 Hz. 0 Locked

    1216 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Not Answered

    SN74HC86: in someone batch, product can't work stably and the current increase continually. 0 Locked

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

    SN74LVT244B: Isolation level 0 Locked

    299 views
    4 replies
    Latest over 3 years ago
    by Kazuhiko Hirano
  • Suggested Answer

    SN74LVTH244A: Bit-to-Bit skew and Part-to-Part skew 0 Locked

    388 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC86A: different bottom marking from different suppliers 0 Locked

    382 views
    7 replies
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC8T245: channel-to-channel and part-to-part skew 0 Locked

    399 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC8T245: SN74LVC8T245\Maximum supported clock rate 0 Locked

    257 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    TIBPAL16R4-15M: Partner Programmer 0 Locked

    234 views
    2 replies
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74HC245A: Missing Datasheet 0 Locked

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

    SN74HCS238: Compatibility verification with CPLD(ICE40UP5K-SG48I) 0 Locked

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

    Comparator 0 Locked

    426 views
    7 replies
    Latest over 3 years ago
    by Sylvain
  • Suggested Answer

    SN74LS122: MC8601 to SN74LS122 0 Locked

    750 views
    7 replies
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74AXC8T245: Any similar devices having Level 2/3 Isolation? 0 Locked

    232 views
    2 replies
    Latest over 3 years ago
    by Kazuhiko Hirano
  • Suggested Answer

    SN74LVC2G17-Q1: Could you please give me SN74LVC2G17-Q1 information? 0 Locked

    356 views
    3 replies
    Latest over 3 years ago
    by Emrys Maier
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