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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

    SN74LVC244A: Can be used for 2.5V to 1.8V voltage down translation? 0 Locked

    271 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUP1T34: 25MHz Clock 3.3V to 1.0V 0 Locked

    296 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHC14: Is it OK to connect 1K pull up resistor to 5V at the output of SN74AHC14PWR powered by 3.3V? 0 Locked

    272 views
    2 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74AVC4T774: Similar parts with more outputs 0 Locked

    201 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC1G19: solution select 0 Locked

    271 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74AXCH1T45: Data rate query 0 Locked

    443 views
    6 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    TXB0108: TXB0108 and TXS0108 have different data rate 0 Locked

    998 views
    5 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC2G08: What's difference between SN74LVC2G08DCURG4 and SN74LVC2G08DCUR 0 Locked

    360 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74AVC4T774: Asking for the level shifter design review suggestion 0 Locked

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

    SN74HC193: IBIS Model 0 Locked

    250 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74HCS74: CLR and PRESET 0 Locked

    2113 views
    3 replies
    Latest over 3 years ago
    by Emrys Maier
  • Not Answered

    TXB0104: Level Shifter Selection 0 Locked

    534 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Not Answered

    SN74AXC8T245: technology 0 Locked

    222 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    LSF0204: What are different of TXS0204RUT、TXU0204RUT and LSF0204RUT ? 0 Locked

    265 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G07: Low-level output current limit 0 Locked

    673 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AHC595: IBIS for SN74AHC595 0 Locked

    364 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G80: SPICE model in LTspice throws error: "Can't find definition of model "GND"" 0 Locked

    1810 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVCH16T245-EP: Debounce time 0 Locked

    571 views
    3 replies
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC3GU04: Matching for current mirror 0 Locked

    728 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    LSF0102: Simulation with either PSpice for TI or TINA-TI 0 Locked

    398 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
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