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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] 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
  • [FAQ] Difference between Multiplexer/De-multiplexer and Analog Switch

    Hari T O0
    Hari T O0
    Other Parts Discussed in Thread: TS5A3159-Q1 , TMUX1209 FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ Hi Team, May I know difference is there between mux/demux IC's and analog switch IC's? I'm comparing this in the context…
    • Answered
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] How do I determine the output voltage (VOH, VOL) or output current (IOH, IOL) of a CMOS logic device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ The high logic level output voltage of a logic device with no load will be the supply voltage. The output current of a logic device is determined by the load connected to the device…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What happens when I connect a logic device's output to a 50 ohm transmission line?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ Transmission lines cause a lot of confusion for engineers. I hope to clear up some of that here. I will break this up into a few sections, so if you already know something you can…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] Can I connect two outputs from a CMOS logic device together directly?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ **** It's important to note that this FAQ is in reference to CMOS devices. Bipolar devices should not be paralleled in this fashion. **** The primary concern with connecting outputs…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What does 'partial power down' or 'Ioff' mean in the datasheet?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The " Ioff " specification in the electrical characteristics table is only in the datasheet of devices that have the special feature of " partial power down " - also known as " back…
    • over 6 years ago
    • Logic
    • Logic forum
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  • Answered

    SN74LVC1G08: Do we have open drain option support VCC=1.8V? 0 Locked

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

    SN74LVC1T45: SN74LVC1T45DRLR Pin color problem 0 Locked

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    SN74AVC4T774: Direction control using GPIO 0 Locked

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    CD74HC02: Query on part terminal finish 0 Locked

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    SN74HC240: SN74HC240APWR 0 Locked

    218 views
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    by Clemens Ladisch
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    SN74AVC4T245: VCCA Clarification 0 Locked

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    by Clemens Ladisch
  • Answered

    SN74AVC4T774: What is the maximum SPI frequency it can translate. 0 Locked

    1213 views
    20 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Answered

    SN74AXC8T245: Bidirectional TDM 4MHz buffer 0 Locked

    365 views
    4 replies
    Latest over 1 year ago
    by Robert Alfred Kecs
  • Answered

    LSF0108: LSF0108 questions regarding behavior at same voltage 0 Locked

    295 views
    2 replies
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    by Robert Alfred Kecs
  • Answered

    SN74AUC1G125: Vih/Vil Specification at VCC=1.0V 0 Locked

    331 views
    2 replies
    Latest over 1 year ago
    by Yoshiyuki Tokumitsu
  • Suggested Answer

    SN74ACT74: Do you have IBIS model for SN74ACT74? 0 Locked

    189 views
    1 reply
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    by Malcolm Lyn
  • Answered

    SN74LVC125A: Regarding the same heading items in the datasheet "5 Specifications" 0 Locked

    292 views
    5 replies
    Latest over 1 year ago
    by Owen Westfall
  • Answered

    SN74LVC244A: External pull up/down resistor 0 Locked

    254 views
    1 reply
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    by Clemens Ladisch
  • Suggested Answer

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    453 views
    7 replies
    Latest over 1 year ago
    by Joshua Salinas
  • Suggested Answer

    SN74LVC1G123: Cext pin connect to GND or only to the Cext? 0 Locked

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

    SN74HC08: Difference between SN74HC08N-E4 and SN74HC08N-G4 0 Locked

    453 views
    1 reply
    Latest over 1 year ago
    by Clemens Ladisch
  • Not Answered

    TXS0102: Jittern issue on the Falling edge of the input pulses 0 Locked

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

    CD74HC238: The ESD of the CD74HC238E 0 Locked

    189 views
    1 reply
    Latest over 1 year ago
    by Albert Xu1
  • Suggested Answer

    SN74AC244-EP: I'm looking for SN74AC244-EP ibis model 0 Locked

    238 views
    1 reply
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  • Answered

    TXU0104: Design Review 0 Locked

    367 views
    5 replies
    Latest over 1 year ago
    by Michael Ikwuyum
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