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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

    TXU0204-Q1: Partial Power Down 0 Locked

    524 views
    6 replies
    Latest over 4 years ago
    by Karan Kotadia
  • Answered

    TXS0102-Q1: VCCA larger than VCCB 0 Locked

    409 views
    1 reply
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN54AC14: Pspice model 0 Locked

    465 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0108: Delay during the LOW transition 0 Locked

    269 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    1.8V to 3.3V level conversion chip 0 Locked

    1713 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    Voltage translators product selection 0 Locked

    530 views
    4 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS594-Q1: SRCLK and RCLK frequency requirement of the device 0 Locked

    840 views
    4 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74HC14: Inverter with specific input feature 0 Locked

    296 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    SN74HC74: barrier metal is used for the internal structure 0 Locked

    311 views
    2 replies
    Latest over 4 years ago
    by TATSUNORI NARITA
  • Suggested Answer

    SN74HC00: SN74HC00 0 Locked

    370 views
    2 replies
    Latest over 4 years ago
    by SHAWN FONG
  • Suggested Answer

    SN54LS244-SP: Radiation Hardness, TID and Displacement Damage info 0 Locked

    596 views
    6 replies
    Latest over 4 years ago
    by Emrys Maier
  • Answered

    SN74HCS08-Q1: Layout 0 Locked

    501 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    SN74LXC8T245-Q1: VCC isolation feature 0 Locked

    583 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Answered

    TXB0104-Q1: OE pin connected to VCCB 0 Locked

    237 views
    3 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Answered

    TXS0108E-Q1: 1V8 CMOS compatibilty 0 Locked

    515 views
    2 replies
    Latest over 4 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC132: accepts 12V input from fan tach signal? 0 Locked

    567 views
    1 reply
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    CD74HC123: Maximum CX value & powerdown considerations 0 Locked

    421 views
    4 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AVC16T245: SN74AVC16T245 0 Locked

    257 views
    1 reply
    Latest over 4 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AHC594: IBIS model availability 0 Locked

    386 views
    2 replies
    Latest over 4 years ago
    by Emrys Maier
  • Suggested Answer

    SN74LVC1G123: Recommended TI voltage translator to level shift up output from SN74LVC1G123 to 12V 0 Locked

    305 views
    3 replies
    Latest over 4 years ago
    by Emrys Maier
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