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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

    SN74LVC1G08: How to Ensure Logic High Glitch Free Power Up 0

    75 views
    2 replies
    Latest 23 days ago
    by Gregory Dieffenderfer
  • Suggested Answer

    TPUL2G123: Pulse generator IC < 10nS 0

    139 views
    6 replies
    Latest 24 days ago
    by Albert Xu1
  • Not Answered

    SN74AXCH2T45: SN74AXCH2T45DCUR 0

    52 views
    1 reply
    Latest 24 days ago
    by Joshua Salinas
  • Answered

    SN74HCS153-Q1: SN74HCS153QWBQBRQ1 0

    65 views
    1 reply
    Latest 24 days ago
    by Ian Graham
  • Suggested Answer

    SN74LVC1G17: Recommendation for fixed hysteresis device 0

    73 views
    3 replies
    Latest 24 days ago
    by Malcolm Lyn
  • Suggested Answer

    SN74AHC1G00: wrong VIH threshold 0

    46 views
    1 reply
    Latest 24 days ago
    by Clemens Ladisch
  • Answered

    SN74AHC244-Q1: Does the SN74AHC244-Q1 share the same die as the SN54AHC244W? 0

    57 views
    1 reply
    Latest 24 days ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC1G17: SN74LVC1G17QDCKRq1 0

    58 views
    1 reply
    Latest 24 days ago
    by Malcolm Lyn
  • Answered

    SN74LVTH125: Complete Thermal Resistance Value 0

    53 views
    3 replies
    Latest 24 days ago
    by Malcolm Lyn
  • Not Answered

    SN54AHCT08: 5962-9682101Q2A Questions 0

    29 views
    0 replies
    Started 24 days ago
    by Cindy Wang
  • Suggested Answer

    SN74LVC2T45: SN74LVC2T45DCTR and SN74LVC2T45DCTRE4: Plating Heated after Deposition | Tin thickness (microns) | Process 0

    76 views
    2 replies
    Latest 24 days ago
    by Jack Guan
  • Answered

    SN74HCS594: Difference to SN74HCS595 0

    399 views
    23 replies
    Latest 25 days ago
    by Dharmesh Joshi
  • Suggested Answer

    SN74AHC14Q-Q1: SN74AHC14QPWRG4HE 0

    37 views
    1 reply
    Latest 25 days ago
    by Malcolm Lyn
  • Answered

    SN74AUC1G14: SN74AUC1G14 0

    397 views
    22 replies
    Latest 25 days ago
    by Rajan Bedi
  • Suggested Answer

    SN74LVC1G34: SN74LVC1G34 powered by 3.3V supply with 1.8V input signal 0

    74 views
    2 replies
    Latest 25 days ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC541A: Regarding Tstg 0

    74 views
    2 replies
    Latest 25 days ago
    by Daisuke Higa
  • Suggested Answer

    SN74LVC3G17: SN74LVC3G17DCUR - Availability of Automotive / EP Grade 0

    40 views
    1 reply
    Latest 25 days ago
    by Michael Marinello
  • Suggested Answer

    SN74AXC8T245: SN74AXC8T245 and SN74AXC2T245 support for 1V2 to 1V8 in 1000Mbps GMII Interface 0

    121 views
    7 replies
    Latest 25 days ago
    by Jack Guan
  • Not Answered

    LSF0102: Request for Pin-Compatible Level Translator with Internal Pull-ups for LSF0102DQER 0

    50 views
    1 reply
    Latest 26 days ago
    by Joshua Salinas
  • Suggested Answer

    SN74HCS541: Inquiry on input/output voltage levels 0

    32 views
    1 reply
    Latest 26 days ago
    by Albert Xu1
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