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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

    SN74LVC1G08: Need Technical Support 0 Locked

    304 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Answered

    SN74LV1T00-Q1: 1.8V to 5V Level Shift 0 Locked

    1209 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LV1T34: is it needed pullup resistor at input side of this IC (SN74LV1T34) 0 Locked

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

    SN74LVC1G14-Q1: Do we have VT+ and VT- voltage VS temperature curve? 0 Locked

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

    TXU0104: Solder Test Failed PN: 53507130-1-19V 0 Locked

    294 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Answered

    TXS0102: I2C SCL not pulled low 0 Locked

    615 views
    5 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    LSF0108: The voltage of B side is abnormal 0 Locked

    317 views
    2 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    CD4070B: VOL and VOH, TTL of LM566 0 Locked

    540 views
    3 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Answered

    SN74AVC4T234: Can u please Verify SN74AVC4T234 Schematic Implementation attached in description page 0 Locked

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

    SN74LVC8T245: VOH and VOL when VCCA/VCCB=5.5V 0 Locked

    338 views
    2 replies
    Latest over 1 year ago
    by Shinichi Inoue
  • Answered

    SN74AVC4T245DGVR Maximum Data Rates 0 Locked

    315 views
    3 replies
    Latest over 1 year ago
    by kimura-t
  • Answered

    SN74AHC1G125: Input impedance of OE# pin 0 Locked

    376 views
    2 replies
    Latest over 1 year ago
    by Eric Sims
  • Answered

    SN74AHCT1G04: Regarding ESD 0 Locked

    319 views
    2 replies
    Latest over 1 year ago
    by Yusuke Kawate
  • Answered

    SN74ACT00: What is the max junction temperature of the device? 0 Locked

    711 views
    2 replies
    Latest over 1 year ago
    by Bowen Ling
  • Not Answered

    LSF0204D: LSF0204D: Unexpected voltage across FET 0 Locked

    282 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    XNOR single Gate in SOT753 or SOT353? 0 Locked

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

    SN74LVC1G175: Regarding thermal data for the part. 0 Locked

    291 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN74HC132: SN74HC132DR marking 0 Locked

    409 views
    4 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Answered

    TXS0104E: Application advise 0 Locked

    347 views
    2 replies
    Latest over 1 year ago
    by Massimo Tosa
  • Answered

    SN74LVC1T45: input levels above power levels (but below 5V) 0 Locked

    290 views
    2 replies
    Latest over 1 year ago
    by Alejandro Gil
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