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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

    SN74ACT14: Does the SN74ACT14DBR have ESD protection? 0 Locked

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

    TXB0304: TXBN0304RSVR: using pull-ups and pull-downs 0 Locked

    1830 views
    9 replies
    Latest over 7 years ago
    by Alfredo Bernardo
  • Suggested Answer

    SN74LVC8T245: Need IBIS Model 0 Locked

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

    Little Logic gates ESD rating 0 Locked

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

    TXS0102-Q1: Slow input transition 0 Locked

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

    SN74LVC00A: Device marking 0 Locked

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

    SN74ABT574A: About damping resistance 0 Locked

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

    TXS0108E: VIL max = 0.15V -- match to an output with VOLmax = 0.45V? 0 Locked

    803 views
    4 replies
    Latest over 7 years ago
    by Amir Natan
  • Suggested Answer

    CD74HC4538: Latch-up from EMP? 0 Locked

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

    SN74AUP1T87: short the AB input 0 Locked

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

    SN74LVC3G07: Partial Power Down 0 Locked

    763 views
    2 replies
    Latest over 7 years ago
    by Gim Song
  • Answered

    SN74AC74: VIL higher than 2.5V replacement? 0 Locked

    475 views
    2 replies
    Latest over 7 years ago
    by [FAE] Andrew Wang
  • Answered

    SN74LVC1T45-Q1: About θja of SN74LVC1T45-EP and SN74LVC1T45-Q1 0 Locked

    678 views
    3 replies
    Latest over 7 years ago
    by Michael J Schultis
  • Suggested Answer

    SN74AHCT541: Noise characteristics specification 0 Locked

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

    LSF0108-Q1: Can it be used for SDIO application 0 Locked

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

    SN74AVCH8T245: Looking for RGMII level shifter 0 Locked

    1187 views
    2 replies
    Latest over 7 years ago
    by [FAE] Andrew Wang
  • Answered

    SN74AUC16245: IBIS model link seems broken 0 Locked

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

    SN74HC595: Source/sink current of 74HC595@3.3V and maximum recommended length of daisy chain? 0 Locked

    4069 views
    6 replies
    Latest over 7 years ago
    by Tuomo Latto
  • Suggested Answer

    SN74LV1T34: support 50Mhz, 1.8v 0 Locked

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

    SN74AVCH16T245: SN74AVCH16T245 Data Rate 0 Locked

    560 views
    1 reply
    Latest over 7 years ago
    by Emrys Maier
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