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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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View FAQ threads
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  • Answered

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

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

    SN74LVC244A: External pull up/down resistor 0 Locked

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

    SN74AVC2T245: Hspice model question 0 Locked

    459 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

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

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

    461 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

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

    CD74HC238: The ESD of the CD74HC238E 0 Locked

    191 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

    243 views
    1 reply
    Latest over 1 year ago
    by Albert Xu1
  • Answered

    TXU0104: Design Review 0 Locked

    371 views
    5 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Not Answered

    TPS62822: IC Short 0 Locked

    326 views
    5 replies
    Latest over 1 year ago
    by Varun John
  • Answered

    SN74LVC2G74-Q1: What is the Q when power on? 0 Locked

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

    SN74AUP1G98: SN74AUP Devices - Proper Termination of Unused Inputs 0 Locked

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

    SN74AVC4T774-Q1: Direction pin switching delay 0 Locked

    232 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Not Answered

    TPLD1201: what is the underlying mechanism for implementing the delay function in TPLD1201 0 Locked

    390 views
    1 reply
    Latest over 1 year ago
    by Gerardo Leyva-Hernandez
  • Suggested Answer

    TIBPAL16R8-30M: Programmer information 0 Locked

    277 views
    1 reply
    Latest over 1 year ago
    by Gerardo Leyva-Hernandez
  • Answered

    SN74AVC4T774-Q1: Need mechanical drawing for BQB package 0 Locked

    380 views
    3 replies
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74LVC1G14-Q1: Clarification on Power Dissipation Calculation for Inverting Buffer 0 Locked

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

    SN74LV1T125: Used as 5V to 1.8V level shifter 0 Locked

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

    SN74HC04: Some lot codes working, others don't 0 Locked

    737 views
    2 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G125: Output rise time 0 Locked

    363 views
    4 replies
    Latest over 1 year ago
    by Johan Gjellan
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