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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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  • Discussion

    LSF0204: The SPICE model downloaded from TI website shows an empty file after importing into TINA Locked

    336 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    TXS0108E: Driving OE pin 0 Locked

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

    SN74HCS595-Q1: Max switching frequency 0 Locked

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

    SN74LVC2G125: Output Impedance 0 Locked

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

    SN54ALS244C-SP: bi-directional buffer 0 Locked

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

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

    SN74LVC3G34: time delay for different channels 0 Locked

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

    LSF0108: The leakage current is observed when the EN pins are not connected to a pull-up resistor 0 Locked

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

    LSF0102: Vref_A I2C pull high resistor. 0 Locked

    379 views
    2 replies
    Latest over 2 years ago
    by Brian Chan
  • Answered

    SN74HCS165: Reading capacitive touch sensor matrix 0 Locked

    1449 views
    4 replies
    Latest over 2 years ago
    by Den L
  • Suggested Answer

    SN74BCT25244: Driving 74BCT25244 BiCMOS octal buffer with 74LS? 0 Locked

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

    TXB0304: LEVEL TRANSLATOR FOR PSEUDO OPEN DRAIN CONFIGURATION 0 Locked

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

    LSF0108: When using LSF0108, we found that the rising edge of the A-B direction waveform was very slow 0 Locked

    326 views
    2 replies
    Latest over 2 years ago
    by yanggang5
  • Answered

    SN74LVC8T245: How to calculate ICC 0 Locked

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

    SN74LVCH8T245: Max operating frequency from 1.8V to 3.3V 0 Locked

    235 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC1T45: output jitter and oscillator converter 0 Locked

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

    TXU0202: TXU0202DCUR , marking 0 Locked

    482 views
    1 reply
    Latest over 2 years ago
    by Joshua Salinas
  • Suggested Answer

    TXS0108E: Use at I2C 0 Locked

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

    TXB0108: Not working with LCD 0 Locked

    357 views
    8 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    TXB0108: Problem when cascading two bidirectional level translators 0 Locked

    337 views
    4 replies
    Latest over 2 years ago
    by Carlos Nieves Onega
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