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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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  • Suggested Answer

    SN74LVC1G32: about SN74LVC1G32MDBV 0 Locked

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

    SN74LVC1G04: Chip metal exposed 0 Locked

    381 views
    4 replies
    Latest over 1 year ago
    by ?? ?
  • Suggested Answer

    SN74ACT244: Influence of power supply voltage 0 Locked

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

    TXB0102: Controller in B and system in A 0 Locked

    442 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HCS08: VT range definition 0 Locked

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

    SN74AHCT16244: Need to find alternative of CY74FCT16244TPVC 0 Locked

    442 views
    10 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    SN74ACT573: VOH, IOH and VCC Plot 0 Locked

    377 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Not Answered

    SN74LVC07A: the reason of no output 0 Locked

    323 views
    5 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0108: Abnormal high voltage when push-pull down translation (3.3V to 1.8V): 0 Locked

    713 views
    10 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G11-Q1: Momentary overcurrent 0 Locked

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

    CD74HC595: Output state when Vcc not present 0 Locked

    299 views
    4 replies
    Latest over 1 year ago
    by Ian Southgate
  • Not Answered

    SN74HC164: SN74HC164 0 Locked

    642 views
    2 replies
    Latest over 1 year ago
    by Malcolm Lyn
  • Answered

    SN74LVC1G14: package outline 0 Locked

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

    SN74AUP2G32: maximum reflow numbers 0 Locked

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

    TXB0104: Color issue of chip coating 0 Locked

    265 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Answered

    TXS02612: Voltage translation 1.8V to 3.3V for SD card; timing delays 0 Locked

    802 views
    2 replies
    Latest over 1 year ago
    by Thomas Rounds
  • Answered

    TXU0204-Q1: Failure Modes for NC pins 0 Locked

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

    TXS0102-Q1: IBIS model of TXS0102 0 Locked

    491 views
    4 replies
    Latest over 1 year ago
    by Sathish Raja
  • Suggested Answer

    LSF0002: 2 bit application 0 Locked

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

    SN7400: Regarding replacement of obsolete TI components 0 Locked

    455 views
    2 replies
    Latest over 1 year ago
    by Clemens Ladisch
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