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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

    SN74LV21A: Spice Model 0 Locked

    176 views
    1 reply
    Latest 8 months ago
    by Albert Xu1
  • Answered

    SN74LV123A: Necessity of Power-up ramp rate 0 Locked

    216 views
    3 replies
    Latest 8 months ago
    by Albert Xu1
  • Suggested Answer

    SN74LV273A: Partial Power Down (Ioff) 0 Locked

    242 views
    1 reply
    Latest 9 months ago
    by Ian Graham
  • Answered

    TPLD1201-RWB-EVM: Regarding the memory of the EVM 0 Locked

    299 views
    3 replies
    Latest 9 months ago
    by Owen Westfall
  • Suggested Answer

    TXS0102: SI simulation model 0 Locked

    209 views
    2 replies
    Latest 9 months ago
    by Jack Guan
  • Answered

    SN74LXC2T45: UART to RS-485 schematic review 0 Locked

    256 views
    2 replies
    Latest 9 months ago
    by Joshua Salinas
  • Suggested Answer

    SN74AHCT240: Why output of SN74AHCT240 oscillation greatly compared with SN74HCT240? 0 Locked

    220 views
    6 replies
    Latest 9 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LV165A: SN74LV165APWR 0 Locked

    186 views
    1 reply
    Latest 9 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G125: SPEC packaging confirmation 0 Locked

    268 views
    5 replies
    Latest 9 months ago
    by Clemens Ladisch
  • Answered

    UCC28740: Flyback Converter Output Voltage Drop Issue at High Load 0 Locked

    279 views
    6 replies
    Latest 9 months ago
    by TAE JIN KO
  • Suggested Answer

    SN74LVC1G11-Q1: SN74LVC1G11-Q1 0 Locked

    196 views
    2 replies
    Latest 9 months ago
    by Michael Marinello
  • Suggested Answer

    SN74LV1T34: Can SN74LV1T34 operate 50MHz clock from 3.3V to 1.8V? 0 Locked

    238 views
    4 replies
    Latest 9 months ago
    by Joshua Salinas
  • Answered

    SN74LVC8T245: Maximum allowable load capacity 0 Locked

    245 views
    2 replies
    Latest 9 months ago
    by Joshua Salinas
  • Suggested Answer

    CY54FCT573T: Replace competitor 0 Locked

    151 views
    1 reply
    Latest 9 months ago
    by Owen Westfall
  • Suggested Answer

    CD74AC00: Junction Temperature is not available 0 Locked

    145 views
    1 reply
    Latest 9 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G123: Problems with part, device marking not specified in datasheet. 0 Locked

    249 views
    4 replies
    Latest 9 months ago
    by Mark Bolduan
  • Answered

    TXS0104E: TWI Interface Issue 0 Locked

    217 views
    3 replies
    Latest 9 months ago
    by Nachiketh Karanth
  • Answered

    TPLD1201: Possible to emulate without ICS? 0 Locked

    421 views
    8 replies
    Latest 9 months ago
    by user4616635
  • Answered

    TXS0104V-Q1: vs TXS0102V Ioff? 0 Locked

    257 views
    5 replies
    Latest 9 months ago
    by Jack Guan
  • Suggested Answer

    CD74HC273: Pinout Discrepancies 0 Locked

    165 views
    1 reply
    Latest 9 months ago
    by Clemens Ladisch
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