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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

    SN74AHCT244: SN74AHCT244MDWREP 0 Locked

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

    CD4093B: Import Toschiba Schottky diode lib 0 Locked

    352 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV1T34: NLSV1T244 0 Locked

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

    SN74LVC1G07: Slew rate of output signal 0 Locked

    514 views
    5 replies
    Latest over 2 years ago
    by Tamio Yokokura
  • Answered

    SN74ACT244-Q1: Noninverting buffers & drivers to control of LEDs 0 Locked

    1773 views
    8 replies
    Latest over 2 years ago
    by Francisco Vera
  • Suggested Answer

    SN74ALVC164245: SN74ALVC164245 Land Pattern 0 Locked

    375 views
    3 replies
    Latest over 2 years ago
    by Swathi D
  • Suggested Answer

    SN74AXCH8T245: 1.2V/3.3 translation at 200Mbps 0 Locked

    426 views
    3 replies
    Latest over 2 years ago
    by Joshua Salinas
  • Answered

    TXB0104: Functional Block Diagram 2 channels mean A2/3 need have to be in same direction? 0 Locked

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

    SN74LVC1G07: Which Iol to pick at 3V supply, as 2 are mentioned in the recommended Operating Conditions 0 Locked

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

    LSF0204: Could we connect un-used pins to GND? 0 Locked

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

    SN74AXC4T245: operating frequency (max) 0 Locked

    474 views
    3 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Not Answered

    SN74HC595: Simulation way 0 Locked

    351 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Answered

    SN74AXC1T45-Q1: Output port status during single power supply condition 0 Locked

    322 views
    2 replies
    Latest over 2 years ago
    by Joshua Salinas
  • Answered

    SN74ACT04: PSpice for TI model Drawing Too Much Current 0 Locked

    281 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    TXS0108E: TXS0108ENMER size problem 0 Locked

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

    SN74LVC1G07: output level question 0 Locked

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

    TXB0101: Same voltage level for VCCA/B 0 Locked

    490 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Not Answered

    SN74AUP1G08: Thermal Characteristics 0 Locked

    226 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Answered

    SN74AVC4T774: operating frequency (max) 0 Locked

    310 views
    2 replies
    Latest over 2 years ago
    by takuya ikeda
  • Answered

    SN74LVC08A: IBIS Model for RGY Package 0 Locked

    316 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
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