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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

    SN74LVC2G79: Clarification on CPD for LVC2G79 needed 0 Locked

    660 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0204: Problems with the communication 3,3V CMOS to 5V TTL 0 Locked

    662 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LS165A: Package Information 0 Locked

    968 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    CD4093B: pin 4 peak current and peak power consumption 0 Locked

    1338 views
    7 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74AVC4T245: SN74AVC4T245 / Pull-down, Pull-up resistor is required for DIR pin? 0 Locked

    1786 views
    1 reply
    Latest over 7 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC165: SN74HC165 is pulling significant current compared to what datasheet states. 0 Locked

    2173 views
    5 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0104: Review & comment my schematics. 0 Locked

    676 views
    2 replies
    Latest over 7 years ago
    by Inho Jeon
  • Suggested Answer

    SN74AUP1T34: SN74AUP1T34: 0 Locked

    530 views
    2 replies
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVT245B: the maximum data rate that SN74LVT245 can support 0 Locked

    1043 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    Suggestions for appropriate level shifters 0 Locked

    5186 views
    3 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC257A: Bidirectional signal on A/B/Y 0 Locked

    603 views
    1 reply
    Latest over 7 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0108: Power-on ramp rate 0 Locked

    577 views
    2 replies
    Latest over 7 years ago
    by Takahiro Saito
  • Answered

    SN74LVC2T45: Input transition (rise and fall) 0 Locked

    629 views
    1 reply
    Latest over 7 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0102: 1.8V to 2.8V converter 0 Locked

    1272 views
    6 replies
    Latest over 7 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0101: Question about level of 'EN' on my schematics. 0 Locked

    442 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
  • Answered

    SN74LVC8T245: Failure modes 0 Locked

    462 views
    2 replies
    Latest over 7 years ago
    by Jason Pritchett
  • Suggested Answer

    TXB0104: Uart Data Corruption 0 Locked

    1092 views
    1 reply
    Latest over 7 years ago
    by Clemens Ladisch
  • Answered

    sn74lvc2g08: Automotive product temperature range 0 Locked

    836 views
    4 replies
    Latest over 7 years ago
    by user5083091
  • Answered

    SN74LVC2G17-Q1: θJc value 0 Locked

    766 views
    4 replies
    Latest over 7 years ago
    by Takamasa Horii
  • Answered

    "54F86" Product checking information related with National Semiconductor Parts 0 Locked

    1034 views
    4 replies
    Latest over 7 years ago
    by Kirby Kruckmeyer96848
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