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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

    SN74AC11: ESD (HBM) 0 Locked

    249 views
    2 replies
    Latest over 1 year ago
    by Siby VV
  • Suggested Answer

    SN74AHC595: Looking for 1.8V logic 0 Locked

    469 views
    3 replies
    Latest over 1 year ago
    by Albert Xu1
  • Suggested Answer

    CD74AC163: ESD (HBM) 0 Locked

    177 views
    1 reply
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    TAS6584Q1EVM: CE/EU Declaration of Conformity (aka EU DoC) required 0 Locked

    244 views
    2 replies
    Latest over 1 year ago
    by Chris Cavillon
  • Suggested Answer

    SN74AHC00: SN74AHC00 suspicious pinout in TI data sheet 0 Locked

    452 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74AVCH4T245: VCC lower than recommended 0 Locked

    179 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204D: Level conversion problem 0 Locked

    588 views
    12 replies
    Latest over 1 year ago
    by Shinya Kume
  • Suggested Answer

    SN54ACT04: Lifecycle Status Question 0 Locked

    269 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    TXS0102-Q1: Voltage level when OE pin pull low 0 Locked

    287 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    TXU0304: Propagation delay in IBIS model 0 Locked

    310 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E-Q1: Channel Connection and Voltage Level 0 Locked

    322 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74AUP2G17: What is maximum frequency SN74AUP2G17 works? 0 Locked

    336 views
    3 replies
    Latest over 1 year ago
    by Albert Xu1
  • Suggested Answer

    SN54LVTH574-SP: Rad Hard? 0 Locked

    580 views
    5 replies
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    SN74AUP2G126: Theta JC / Max Tj information 0 Locked

    393 views
    5 replies
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    SN74LV6T17: input signal when device is powered OFF 0 Locked

    398 views
    3 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    TXS0102: DCUR versus DCUT and what is G4 0 Locked

    365 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    LSF0204: VIH, VIL, VOH, VOL of input/output pins 0 Locked

    298 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS244: ENQUIRY ON DISCOLORATION LEADS FOR PART SN74HCS244QPWRQ1 (SO#171288) 0 Locked

    248 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN54SLC8T245-SEP: Cold Sparing Question 0 Locked

    278 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Not Answered

    CD74HC125: Contain different electronic size 0 Locked

    183 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
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