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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

    TXS0104E: Single Event Effect 0 Locked

    211 views
    1 reply
    Latest over 2 years ago
    by Jack Guan
  • Answered

    SN54LS674: Cascading Parallel to Serial Conversion Shift Registers 0 Locked

    1566 views
    4 replies
    Latest over 2 years ago
    by Viraj Patel
  • Answered

    SN54LS673: Cascading Serial to Parallel Conversion Shift Registers 0 Locked

    1097 views
    5 replies
    Latest over 2 years ago
    by Viraj Patel
  • Suggested Answer

    SN74AXCH8T245: Power Up Sequence 0 Locked

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

    SN74LVC1G14: Input voltage specifications 0 Locked

    410 views
    3 replies
    Latest over 2 years ago
    by Mike Havey
  • Answered

    SN74LVCC3245A: Dynamic Parameters and Latch-up Current 0 Locked

    425 views
    1 reply
    Latest over 2 years ago
    by Jack Guan
  • Answered

    SN74AVC8T245-Q1: DIR Pull-up Resistor 0 Locked

    477 views
    2 replies
    Latest over 2 years ago
    by joe lindula
  • Answered

    SN74AXC8T245: DIR Pull-up Resistor Value 0 Locked

    360 views
    2 replies
    Latest over 2 years ago
    by joe lindula
  • Suggested Answer

    TXB0104-Q1: SPI Baud Rate of TXB0104-Q1 0 Locked

    897 views
    4 replies
    Latest over 2 years ago
    by Jack Guan
  • Suggested Answer

    SN74LVC1G14: Advice to pick right logic family and devices for next 10-20yrs 0 Locked

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

    SN74AHCT1G126: Can this device be used with a supply voltage of 3.3V? 0 Locked

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

    CD74HC4046A: PC3OUT OPERATION 0 Locked

    526 views
    7 replies
    Latest over 2 years ago
    by user1126267
  • Suggested Answer

    SN74LVC126A: the pull-down resistor of OE pin 0 Locked

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

    SN74LS73A: Difference between SN74LS73N and the SN74LS73A 0 Locked

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

    CD74HCT368: Output state on power up 0 Locked

    237 views
    1 reply
    Latest over 2 years ago
    by Emrys Maier
  • Answered

    SN74LVC1T45: Lead frame differences 0 Locked

    513 views
    4 replies
    Latest over 2 years ago
    by Jack Guan
  • Answered

    SN74LVC1G125: What does the error message "Item is not fully scheduled" mean 0 Locked

    301 views
    5 replies
    Latest over 2 years ago
    by Owen Westfall
  • Suggested Answer

    SN74LVC1G07-Q1: (VOL) for SN74LVC1G07QDRYRQ1 when its Vcc = 3.3V 0 Locked

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

    /CLR function for D latch 0 Locked

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

    SN74AHC123A: Need to found same function replace 74HC123 0 Locked

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