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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

    TXS0102: TXS0102YZPR - usage with external sensor on 1m wire, 2.2K Ohm pull-up, 3.3V (SHT35) 0 Locked

    165 views
    2 replies
    Latest 6 months ago
    by Achim Kraus
  • Answered

    SN74AVC32T245: Max Data Rates for 1.2V -> 1.8V and 1.8V -> 1.2V 0 Locked

    223 views
    4 replies
    Latest 6 months ago
    by Joshua Salinas
  • Answered

    SN74LVC1G08: Input Level is not the Same 0 Locked

    108 views
    1 reply
    Latest 6 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS00-Q1: SN74HCS00QDRQ1 0 Locked

    128 views
    1 reply
    Latest 6 months ago
    by Albert Xu1
  • Suggested Answer

    SN74HCS00-Q1: Pin FMEA of IC SN74HCS00QDRQ1 0 Locked

    134 views
    1 reply
    Latest 6 months ago
    by Albert Xu1
  • Not Answered

    TXV0106-Q1:TXV106-Q1 Leakage voltage 0 Locked

    212 views
    5 replies
    Latest 6 months ago
    by Joshua Salinas
  • Suggested Answer

    SN74LVC1G97: How much is the input leakage current? 0 Locked

    416 views
    7 replies
    Latest 6 months ago
    by Ian Graham
  • Suggested Answer

    TXU0304: Schematic review of TXU0304 0 Locked

    142 views
    1 reply
    Latest 6 months ago
    by Joshua Salinas
  • Suggested Answer

    SN74GTL2014: GTL2014PWZ TSSOP-14 TI Cross 0 Locked

    104 views
    1 reply
    Latest 6 months ago
    by Joshua Salinas
  • Suggested Answer

    SN74AXC1T45: Convert .cir to .olb file for PSpice simulation 0 Locked

    169 views
    1 reply
    Latest 6 months ago
    by Joshua Salinas
  • Answered

    TXS0108E: Issue with UART communication through level translator 0 Locked

    321 views
    6 replies
    Latest 6 months ago
    by Jack Guan
  • Suggested Answer

    TXB0304: Power consumption Calculation 0 Locked

    116 views
    1 reply
    Latest 6 months ago
    by Jack Guan
  • Suggested Answer

    SN7400: Topside part marking 0 Locked

    322 views
    6 replies
    Latest 6 months ago
    by Malcolm Lyn
  • Suggested Answer

    SN74HC04: UL Certification 0 Locked

    189 views
    5 replies
    Latest 6 months ago
    by Owen Westfall
  • Answered

    TXB0108: Footprint and pinout 0 Locked

    258 views
    2 replies
    Latest 6 months ago
    by Alberto Vella
  • Suggested Answer

    SN54LS04: Military PN identification 0 Locked

    136 views
    1 reply
    Latest 6 months ago
    by Clemens Ladisch
  • Suggested Answer

    Derivation of the Rsns Formula in LM5022 Boost Converter 0 Locked

    184 views
    1 reply
    Latest 6 months ago
    by Harry Hofner
  • Suggested Answer

    TXS0101: Request for PSpice Model of Voltage Level Translator (1.8V to 5V) 0 Locked

    266 views
    2 replies
    Latest 6 months ago
    by Anusree T V
  • Answered

    LSF0108: Ioff Or Partial Power Down Features? 0 Locked

    129 views
    1 reply
    Latest 6 months ago
    by Jack Guan
  • Suggested Answer

    TXB0108: SPI Repeater 0 Locked

    248 views
    5 replies
    Latest 6 months ago
    by Jack Guan
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