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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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  • Not Answered

    SN74HCT08: Difference with SN74ACT08 0 Locked

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

    SN74LV541AT: Is it OK to always tie OE to GND? 0 Locked

    285 views
    2 replies
    Latest over 2 years ago
    by TkMk
  • Not Answered

    CD74HC192: Pspice model 0 Locked

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

    TXB0108: Driving current issue 0 Locked

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

    SN54AC00-DIE: Request SPICE model for SN54AC00 family output 0 Locked

    423 views
    2 replies
    Latest over 2 years ago
    by Emrys Maier
  • Answered

    TXS0108E: Cascading devices? 0 Locked

    356 views
    2 replies
    Latest over 2 years ago
    by Martin Galster
  • Suggested Answer

    SN74LVC125A: RN PCU_QC Buffer_ESD_Diode on the OE# pin(Pin 1,4) 0 Locked

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

    SN54HC244: LCCC (20) 0 Locked

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

    SN74V293: FIFO data out isn't always the FIFO data that went in. 0 Locked

    1278 views
    15 replies
    Latest over 2 years ago
    by Colin Stocks
  • Suggested Answer

    SN74AHC1G08: Input transition rise or fall rate Δt/Δv define in datasheet 0 Locked

    1214 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVCH4T245-EP: prop delay maximum spec 0 Locked

    372 views
    3 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LXC8T245: Is it ok to have nOE and Dir pulled to +5V when in the powered down state ? 0 Locked

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

    SN74LXC8T245: When Vcca=1.8V what is Vt- for inputs referenced to vcca ? 0 Locked

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

    LSF0204: auto direction detection function and device recommend 0 Locked

    354 views
    3 replies
    Latest over 2 years ago
    by Clemens Ladisch
  • Suggested Answer

    LSF0108: CIO and Total Cl 0 Locked

    500 views
    7 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    TXS0108E: Mechanical Stress Rating 0 Locked

    299 views
    1 reply
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    LSF0108: the vref A has an output when we give Vref B and EN PIN 5V voltage 0 Locked

    321 views
    3 replies
    Latest over 2 years ago
    by Michael Ikwuyum
  • Suggested Answer

    SN54LS374: What are the specific differences between SN54LS374 and SNJ54LS374J? 0 Locked

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

    TXS02612: Questions of TXS02612 0 Locked

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

    LSF0102: Both of A and B are with 3.3V Vpu when Vref_A= 1.8V or 3.3V and Vref_B= 5V 0 Locked

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