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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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  • Discussion

    TXB0304: IBIS Model not outputting expected voltage in ADS. Locked

    467 views
    3 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    TXB0104-Q1: TXB0104-Q1 Max Date Rate Issue 0 Locked

    349 views
    2 replies
    Latest over 1 year ago
    by Xiaoxiang Liu
  • Discussion

    TXB0104: Use on 1.8V level with 0.2xsupply voltage spec for logic low Locked

    392 views
    7 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1G32: AUP1G32 for Automotive parts 0 Locked

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

    LSF0108: level transfer issue 0 Locked

    419 views
    9 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74AUP1G98: SN74AUP1G98DRL Storage Temperature Range 0 Locked

    263 views
    2 replies
    Latest over 1 year ago
    by Markus Lempen37
  • Answered

    SN74LV594A: Could I wire pin 3 "QD" to ground directly event this pin is at output high situation, VCC=P3V3 0 Locked

    292 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74AVC2T244: Input Hysteresis 0 Locked

    390 views
    2 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    LSF0204: Level shifter with push pull for SPI communication 0 Locked

    964 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVTH244A: Exposed pad RGY package 0 Locked

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

    TXS0104E: MDMS report 0 Locked

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

    SN74AUP1G17: SN74AUP1G17DBVR 0 Locked

    473 views
    6 replies
    Latest over 1 year ago
    by Rani T C
  • Discussion

    TXS0102: OE pin pull up and pull down resistor Locked

    762 views
    4 replies
    Latest over 1 year ago
    by Jack Guan
  • Discussion

    TXB0104-Q1: TXB0104-Q1 for Uart Issue Locked

    781 views
    7 replies
    Latest over 1 year ago
    by Jack Guan
  • Answered

    SN74LXC1T14-Q1: Need to Have 5V Square Wave from 0.8Vpp Clipped Sine Wave TCXO Source 0 Locked

    859 views
    8 replies
    Latest over 1 year ago
    by Wira Aditama
  • Suggested Answer

    LSF0108: TXS0108 & LSF0108 Diff? 0 Locked

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

    SN74LVC1G11: Oputput state when unpowered 0 Locked

    428 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Discussion

    SN74AXC4T774-Q1: SN74AXC4T774-Q1 is Driving MISO line to LOW Locked

    476 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74AUP1G125: Max V_OL for Vcc=1.1V? 0 Locked

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

    SN74LVC1G00: About SN74LVC1G00 failure mode 0 Locked

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