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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

    SN74LVC245A: SN74LVC245A in Mixed Voltage during Power-Up 0 Locked

    365 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN54HC574: JM38510/65604BRA VS SNJ54HC574J 0 Locked

    290 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Not Answered

    SN74LS02: Simulation issue: SN74LS02 gate rise- and fall-times depends on input frequency 0 Locked

    278 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Not Answered

    TXS0102: about Level shifter TXS0102 for I2C signal 0 Locked

    2905 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1T34: High to Low Voltage Translation 0 Locked

    298 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1T34: Tying VCCA and A Pins 0 Locked

    311 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: If can be used for 1.8V LVCMOS level shifter 0 Locked

    258 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74ALVCH162373: SN74ALVCH162373: SN74ALVCH162373 EOLA and finding recommended replacement 0 Locked

    320 views
    2 replies
    Latest over 5 years ago
    by Lee Chiew Teik
  • Not Answered

    CD74HC283: ESD spec(HBM/CDM) of CD74HC283M 0 Locked

    355 views
    2 replies
    Latest over 5 years ago
    by Masahiro Chino
  • Suggested Answer

    CD74HC4060: CD74HC4060m96 0 Locked

    557 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0102: Design Question 0 Locked

    389 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    CD74HC132: Characterization data 0 Locked

    264 views
    1 reply
    Latest over 5 years ago
    by Emrys Maier
  • Suggested Answer

    Asking for the logic design suggestion 0 Locked

    352 views
    3 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC1G125-Q1: Datasheet question (over recommended spec) 0 Locked

    449 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0204: Level Shifter Schematic Review 0 Locked

    502 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0108: TXB, TXS, LSF for High-Z / Push-Pull signals? 0 Locked

    674 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    CD4050B: Conflicting specs 0 Locked

    483 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHC1G08: Related Part Selection 0 Locked

    294 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    LSF0102: LSF0102 Voltage Isolation 0 Locked

    370 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    CD4047B: ref design for DC to AC 0 Locked

    436 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
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