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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

    SN74LVC4245A: DIE Revision on specific lot vs PCN 20230322001.1 0

    56 views
    1 reply
    Latest 18 days ago
    by Joshua Salinas
  • Suggested Answer

    SN74AVCH2T45: Vcc slew rate slower than recommend 0

    56 views
    1 reply
    Latest 18 days ago
    by Joshua Salinas
  • Suggested Answer

    SN74AVC4T245: abnormal waveform 0

    120 views
    5 replies
    Latest 18 days ago
    by Joshua Salinas
  • Suggested Answer

    SN7417: SN1701022RSBT VVM type and size? 0

    112 views
    3 replies
    Latest 20 days ago
    by Nick Zahabizadeh
  • Suggested Answer

    SN74AUC1G125: Buffer or level translator that work for logics less than 0.8V 0

    85 views
    2 replies
    Latest 20 days ago
    by Joshua Salinas
  • Answered

    TPLD1201: Some question about TPLD1201.. 0

    72 views
    1 reply
    Latest 21 days ago
    by Nikki Dengel
  • Suggested Answer

    SN74LVT8986: Thermal Enquiries for SN74LVT8986PM 0

    92 views
    4 replies
    Latest 21 days ago
    by Owen Westfall
  • Suggested Answer

    SN74LVC1G123: Datasheet Clarification for Discharge on Rext/Cext pin & output pulse constant 0

    103 views
    1 reply
    Latest 21 days ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T245: Power VCCB when VCCA is off 0

    42 views
    1 reply
    Latest 21 days ago
    by Joshua Salinas
  • Answered

    SN74LV1T126: SN74LV1T126 Part variance.. 0

    77 views
    5 replies
    Latest 21 days ago
    by Joshua Salinas
  • Suggested Answer

    SN74LVC1G175: SN74LVC1G175DCKR : have part with 2249 date code and can i use it ? 0

    52 views
    1 reply
    Latest 22 days ago
    by Owen Westfall
  • Not Answered

    SN74LVC16245A: I can't use 8 bits. 0

    39 views
    1 reply
    Latest 22 days ago
    by Owen Westfall
  • Suggested Answer

    SN74AVC24T245: Is VOL(max) characterization available for 0-50C (or similar) 0

    87 views
    3 replies
    Latest 22 days ago
    by Joshua Salinas
  • Answered

    SN74AXC4T245: VOH, VOL Values at 1.8V VCCI 0

    65 views
    3 replies
    Latest 22 days ago
    by Abhijith TP
  • Suggested Answer

    SN74LVC245A: Checking some odd wording in the datasheet 0

    95 views
    1 reply
    Latest 22 days ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E: Disable time value due to revision change. 0

    55 views
    1 reply
    Latest 23 days ago
    by Jack Guan
  • Not Answered

    SN74LV14A: PSpice for TI Simulation 0

    130 views
    4 replies
    Latest 23 days ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC1G08: How to maintain the output amplitude of SN74LVC1G08 in the LMG1020EVM-006? 0

    233 views
    10 replies
    Latest 23 days ago
    by Albert Xu1
  • Suggested Answer

    AFE7950EVM: Reg-Onboard sampling Clock query 0

    58 views
    1 reply
    Latest 23 days ago
    by David Chaparro
  • Suggested Answer

    TXS0104E: Screen printing issue. 0

    78 views
    1 reply
    Latest 23 days ago
    by Jack Guan
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