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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] How does a monostable multivibrator (one shot) work?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The above functional block diagram shows generally how a monostable multivibrator (MMV, or one-shot) works. Not all of them have every part shown, but this is the most common…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What's the difference between TTL and 5V CMOS logic?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ It's very common for people to refer to "TTL logic" and to actually mean "5V logic" -- but how are they different? The key difference is in the input and output voltages. This graphic…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference in timing between gates in the same device? How much skew is expected within a given logic device? What is the part-to-part skew?

    Karan Kotadia
    Karan Kotadia
    FAQ: Logic and Voltage Translation > Timing Parameters >> Current FAQ The difference in delay between the individual channels on an individual part is referred to as channel-to-channel skew or output skew. This is typically not covered as a datasheet…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between the SN74HCxx and the SN74HCxxA?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN7400 , SN74LS00 FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The High-speed CMOS (HC) logic family was created as a direct replacement for older bipolar junction transistor based transistor…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What method is best used for estimating specification values between those given in the datasheet?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ The most common example of this question comes from the fact that Standard Logic devices are specified at 1.65V, 3V, and 4.5V, however most engineers use our devices at 1.8V, 3.3V…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] When will TI End of Life (EOL) or Obsolete a certain logic device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Quality and Manufacturing >> Current FAQ TI's General Quality Guideline (page 7) describes our official policy on obsoleting a device. This policy is summarized below. TI's Product withdrawal/discontinuance process…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What are the power sequencing requirements for the translation device?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ Some of the TI translators have requirements during normal operation mode to have Vcca <= Vccb ( TXS/ TXB01xx) or Vrefb>= VrefA+0.8V(LSF). However, the TI translation devices do…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between IOFF and VCC isolation? What are the conditions to guarantee it?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The I OFF specification guarantees the I/O ports are in high impedance whenever either one of the power supply is at pulled to ground (0V) or close to gnd(<100mV as specified for the…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What should be done with unused I/O pins of the level translator devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ For the TXB family, unused I/O ports are recommended to be tied to GND through a weak pulldown resistors (>=100kohm). For TXS devices, the internal 10kohm pull-ups resistors will…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] Why is there no PSpice model for a Monostable Multivibrator device?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ To make a long post short: MMVs cannot be directly simulated by PSpice because of their direct dependence on external components…
    • over 6 years ago
    • Logic
    • Logic forum
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  • Answered

    SN74LS139A: Output States without Power 0 Locked

    304 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    SN74AXC4T774: BUS contention 0 Locked

    674 views
    4 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC8T245: Changing Outputs with Constant Inputs 0 Locked

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

    TXS0108E: Ringing outputs / Spice Model 0 Locked

    679 views
    7 replies
    Latest over 5 years ago
    by Dylan Hubbard
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    SN74LVC1G3208: output voltage about SN74LVC1G3208 0 Locked

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    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
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    SN74HCT125: IC geting short VCC to GND 0 Locked

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    by Obi Oji
  • Suggested Answer

    SN74LV1T08: How to get a 180 degree phase shift output from SN74LV1T08DCKR 0 Locked

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    1 reply
    Latest over 5 years ago
    by Karan Kotadia
  • Answered

    Please select a MUX chip used to translate 1.05V level signal. 0 Locked

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    4 replies
    Latest over 5 years ago
    by Saminah C
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    SN74LVC16373A: SN74LVC16373A <Maximum Power Dissipation> 0 Locked

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    by Karan Kotadia
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    Search for module with 6 Inputs to trigger 6 Outputs 0 Locked

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    TXS0104E: I2C issue 0 Locked

    777 views
    8 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC245A: If a current-limiting resistor is needed on the input pin. 0 Locked

    1402 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVT16244B: We want to check the Hysteresis threshold for the Vih and Vil 0 Locked

    1817 views
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    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74AHC1G09: VOL value for different current and supply 0 Locked

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

    SN74AVC4T774: higher level on Input than VCC 0 Locked

    246 views
    2 replies
    Latest over 5 years ago
    by robert_2100
  • Answered

    TXS02324: does txs02324 can support with 4G? 0 Locked

    614 views
    8 replies
    Latest over 5 years ago
    by Hapidz Daulah Nurisman
  • Suggested Answer

    SN74LVT245B: Octal buffer seeing intermittent/latent failures where one or more channels are latching output either high or low. 0 Locked

    1391 views
    11 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Answered

    Logic buffer to drive 100pF line 0 Locked

    326 views
    2 replies
    Latest over 5 years ago
    by franziskus
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