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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

    SN74ABT827: Discrepancy between Reliability Tool and Datasheets, please advise 0 Locked

    275 views
    2 replies
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC1G17: Temperature dependency of Spice model available for SN74LVC1G17 0 Locked

    365 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV244A: Is the PCN change package size the same? 0 Locked

    329 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    LSF0102: Max lead thickness of the 'DCUR Package 0 Locked

    346 views
    6 replies
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    SN74HC4060: timer circuit 0 Locked

    443 views
    1 reply
    Latest over 2 years ago
    by Malcolm Lyn
  • Suggested Answer

    LSF0102: Questions of LSF0102 0 Locked

    229 views
    1 reply
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    SN74AXC4T774: VCCA and VCCB supply restriction 0 Locked

    295 views
    1 reply
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    SN74LVC1G97: SN74LVC1G97QDCKRQ1 0 Locked

    423 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0108-Q1: unused pin 0 Locked

    512 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    LSF0204: push-pull to push-pull level shifter 0 Locked

    559 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC244A: SN74LVC244ARWPR Ibis Model 0 Locked

    218 views
    1 reply
    Latest over 2 years ago
    by Malcolm Lyn
  • Answered

    SN74LVC16244A: Question on fanout of the output 0 Locked

    264 views
    1 reply
    Latest over 2 years ago
    by Malcolm Lyn
  • Suggested Answer

    SN74LVC125A: Junction to board and junction to case temperature 0 Locked

    309 views
    5 replies
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74LVC125A: SPI CS Buffering 0 Locked

    295 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    TXS0108E: sink current capablity 0 Locked

    389 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    TXS0108E-Q1: maximum output load capacitance 0 Locked

    320 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Answered

    SN54HC595: How to make a test for testing the shift register's basic functionality 0 Locked

    957 views
    3 replies
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV4040A: The latest datasheet reverses the pin functions of pins 9 to 16. 0 Locked

    194 views
    1 reply
    Latest over 2 years ago
    by Malcolm Lyn
  • Suggested Answer

    TXS0108E-Q1: Technical issue 0 Locked

    199 views
    1 reply
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    CODECOMPOSER: CCS coding aids 0 Locked

    149 views
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    by Ki
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