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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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  • Not Answered

    SN74HC193: SN74HC193PWR ESD level consultation 0 Locked

    223 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74LVC1G125: CLVC1G125MDCKREP: what is the delamination impact on the component fiability? 0 Locked

    315 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    SN74HC14-Q1: SN74HC14DR and SN74HC14QDR and IMDS 0 Locked

    602 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LV1T34: auto version for this part 0 Locked

    427 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1G32: marking issue SN74AUP1G32DPW 0 Locked

    762 views
    7 replies
    Latest over 4 years ago
    by Elena Karacheva
  • Suggested Answer

    SN74AHC574: Both of pin9 and pin11 connect to 25MHz CLK 0 Locked

    254 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC8T245: input higher than supply 0 Locked

    241 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    CD4069UB: Is it original Texas IC? 0 Locked

    506 views
    2 replies
    Latest over 4 years ago
    by Luca Peterlini
  • Answered

    SN74HCS00-Q1: Input threshold temperature variations 0 Locked

    464 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN7400: SN7400 0 Locked

    377 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74LVC1G80: with schmitt trigger 0 Locked

    339 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN7400: SN7400 0 Locked

    348 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    CD74HC123: CD74HC123NSR 0 Locked

    456 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC2T45: Wanted a part number for a chip that can do 5V to 3V3 transition at atleast 300 Mbps 0 Locked

    282 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Not Answered

    SN74LVC1G17: SN74LVC1G17 VCC and GND are close to short . 0 Locked

    447 views
    9 replies
    Latest over 4 years ago
    by Dale Blankenship1
  • Suggested Answer

    SN74LVC1G97: Thermal Characteristics 0 Locked

    326 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    CD74HCT221: CD74HCT221E Logic Diagram 0 Locked

    326 views
    1 reply
    Latest over 4 years ago
    by Rami Mooti1
  • Not Answered

    TXS0104E: Voltage level shifter issue in touch panel 0 Locked

    372 views
    2 replies
    Latest over 4 years ago
    by Rami Mooti1
  • Suggested Answer

    SN74LVC8T245: SN74LVC8T245 Glitchfree Power-Up 0 Locked

    677 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: Pull-high resistance design for LSF0204 0 Locked

    415 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
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