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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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View FAQ threads
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  • Answered

    SN74LVC2G17: SN74LVC2G17 0 Locked

    1218 views
    7 replies
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0108: Logic forum 0 Locked

    2199 views
    5 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74AHC1G14: VT+ and VT- in case of Vcc=2.4V, Vcc=2.5V or Vcc=2.7V 0 Locked

    394 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVCH244A: Input Voltage Rise time and Fall time 0 Locked

    409 views
    1 reply
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    SN74AUP1T17: Level translation for 125MHz LVCMOS clock signal 0 Locked

    943 views
    3 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    SN74LV14A: Input impedance @Vcc=5.0V 0 Locked

    469 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74LVC1G125: RoHS2 0 Locked

    433 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    TICPAL22V10Z-25C: Replacement part for TIBPAL22V10ACNT needed. 0 Locked

    694 views
    2 replies
    Latest over 6 years ago
    by Christian Lauruschkat
  • Answered

    SN74LVC157A: SN74LVC157A IOH current with Vcc = 3.3V 0 Locked

    544 views
    2 replies
    Latest over 6 years ago
    by Alex Yeh
  • Suggested Answer

    CD74HC573: About the TOP-SIDE MARKING of the device 0 Locked

    527 views
    2 replies
    Latest over 6 years ago
    by Emrys Maier
  • Not Answered

    SN74LVC1G08: Thermal Data for DSF Package 0 Locked

    676 views
    4 replies
    Latest over 6 years ago
    by Emrys Maier
  • Not Answered

    [FAQ] How do I determine the output voltage (VOH, VOL) or output current (IOH, IOL) of a CMOS logic device? 0 Locked

    17478 views
    0 replies
    Started over 6 years ago
    by Emrys Maier
  • Answered

    AND Gate Output State During Power-Up 0 Locked

    1228 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0108: LSF0108 0 Locked

    411 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC06A: SN74LVC06A max freq. 0 Locked

    428 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G123: Consumption Current 0 Locked

    278 views
    1 reply
    Latest over 6 years ago
    by Emrys Maier
  • Answered

    SN74AXC8T245: Can VCCA = VCCB? 0 Locked

    575 views
    2 replies
    Latest over 6 years ago
    by ShreyasRao
  • Suggested Answer

    TXB0108: TXB power-up requirements 0 Locked

    815 views
    6 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    LSF0108-Q1: VIL / VOL spce? 0 Locked

    468 views
    4 replies
    Latest over 6 years ago
    by ShreyasRao
  • Answered

    TXB0304: Question on Additional Care-about Vcc <= Vccb 0 Locked

    321 views
    2 replies
    Latest over 6 years ago
    by ShreyasRao
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