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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

    TPLD1202: Changing the threshold voltages of the analog comparators 0 Locked

    261 views
    2 replies
    Latest 7 months ago
    by Ian Graham
  • Suggested Answer

    SN74LVC1G08-Q1: datasheet link broken 0 Locked

    162 views
    2 replies
    Latest 7 months ago
    by Albert Xu1
  • Suggested Answer

    LM5146-Q1: Rated power dissipation 0 Locked

    189 views
    2 replies
    Latest 8 months ago
    by Timothy Hegarty
  • Suggested Answer

    SN74LV126A: Need information 0 Locked

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

    SN74LVC126A: Output Behaviour When Not Supplied 0 Locked

    176 views
    3 replies
    Latest 8 months ago
    by Jakob Z
  • Answered

    SN74LVC2G06: Clamp current 0 Locked

    193 views
    1 reply
    Latest 8 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN54AHCU04: SN54AHCU04 0 Locked

    135 views
    1 reply
    Latest 8 months ago
    by Clemens Ladisch
  • Answered

    SN74HC11: What is the ESD Sensitivity HBM Class, PN SN74HC11PWR 0 Locked

    177 views
    1 reply
    Latest 8 months ago
    by Albert Xu1
  • Suggested Answer

    SN74HCS164-Q1: Rising time of CLK 0 Locked

    173 views
    1 reply
    Latest 8 months ago
    by Clemens Ladisch
  • Answered

    TAS2505EVM: Increasing the gap time between IOVDD and DVDD when powering up with USB input 0 Locked

    462 views
    6 replies
    Latest 8 months ago
    by Ivan Salazar
  • Suggested Answer

    LSF0204: LSF0204 related issues 0 Locked

    162 views
    2 replies
    Latest 8 months ago
    by Jack Guan
  • Suggested Answer

    TXU0102-Q1: Spice-model? 0 Locked

    323 views
    5 replies
    Latest 8 months ago
    by Joshua Salinas
  • Answered

    TXB0108: Minimum Pull-up Resistance 0 Locked

    222 views
    2 replies
    Latest 8 months ago
    by Jack Guan
  • Answered

    SN74AHCT1G86: Input threshold max. min. levels 0 Locked

    251 views
    7 replies
    Latest 8 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G08: inputs applied before VCC 0 Locked

    181 views
    2 replies
    Latest 8 months ago
    by Vidhya J
  • Suggested Answer

    SN74LVT245B: When OE is Lo at power up 0 Locked

    176 views
    2 replies
    Latest 8 months ago
    by Hiroaki Yuyama TED
  • Suggested Answer

    SN74LVC1G00: SN74LVC1G00DBVTG4 TJ Max info 0 Locked

    115 views
    1 reply
    Latest 8 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC573A: Input voltage > VCC 0 Locked

    106 views
    1 reply
    Latest 8 months ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0108: Output voltage can't pull down to GND 0 Locked

    199 views
    4 replies
    Latest 8 months ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC8T245: Schematic review 0 Locked

    196 views
    4 replies
    Latest 8 months ago
    by Clemens Ladisch
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