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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

    SN74HC138A: Difference in specifications 0 Locked

    357 views
    2 replies
    Latest over 2 years ago
    by Luna
  • Answered

    CD4001B: About “-NG” suffix 0 Locked

    405 views
    2 replies
    Latest over 2 years ago
    by Hide
  • Suggested Answer

    SN74AVC4T774: time need for the DIR change to be effective 0 Locked

    343 views
    3 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    SN74HC14A: Input transition (rise and fall) time 0 Locked

    429 views
    2 replies
    Latest over 2 years ago
    by Sadanori Kato
  • Suggested Answer

    CD40106B: schmitt trigger Adder Circuit 0 Locked

    455 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AXC4T774: NCSI 50MHz repeater 0 Locked

    502 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Answered

    SN74LVC2G74-Q1: Why does this device has such a fast input transition requirement? 0 Locked

    458 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Suggested Answer

    CY74FCT162373T: Device Replacement 0 Locked

    180 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXS02326A: What are specific use cases for the external clock input? 0 Locked

    220 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    DS320PR1601-RSC-EVM 0 Locked

    603 views
    4 replies
    Latest over 2 years ago
    by Nasser Mohammadi
  • Answered

    SN54AHC244: CFP pinout 0 Locked

    318 views
    2 replies
    Latest over 2 years ago
    by Albert Xu1
  • Answered

    SN74HC04: Die-shrink and date-code verification 0 Locked

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

    SN74LVC1G10: Could you please share FIT data and Lifecycle data like its Years to EOL for SN74LVC1G10? 0 Locked

    318 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Not Answered

    SN74AHC595: Request for Lifecycle Information for 1734-OBx/xE_MCU_Redesign 0 Locked

    251 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Answered

    SN74LVC1G125: The Cpd of SN74LVC1G125DCKR 0 Locked

    333 views
    1 reply
    Latest over 2 years ago
    by Ian Graham
  • Answered

    SN74LVC1G14: Excessive supply current near thresholds 0 Locked

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

    SN74AUP1T34: What is the input transition rise or fall rate specification when VCCA less than 3.0V? 0 Locked

    327 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G373: SN74LVC1G373DCKR vs 74LVC1G373DCKRG4 0 Locked

    347 views
    2 replies
    Latest over 2 years ago
    by Albert Xu1
  • Answered

    SN74HCS09: Please recommend a suitable IC 0 Locked

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

    SN74ABT541B: Junction Temp 0 Locked

    366 views
    1 reply
    Latest over 2 years ago
    by Clemens Ladisch
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