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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

    SN74LVC245A: Output Voltage Level 0 Locked

    944 views
    8 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AUC16244: meet bandwidth 533Mbps 0 Locked

    352 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    TXS0102: looking for replacement solution 0 Locked

    437 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC1G07: Input Voltage higher than Vcc 0 Locked

    1234 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    TXB0104: Trying to adapt voltage levels for an SDI-12 bus with a 3.3V MCU 0 Locked

    3861 views
    4 replies
    Latest over 5 years ago
    by Nicolas Harel
  • Suggested Answer

    LSF0101: Need Values for Noise Margin Calculation 0 Locked

    639 views
    2 replies
    Latest over 5 years ago
    by Anoop Kumar K V
  • Answered

    SN74LS02: ESD Rating of SN74LS02NSR 0 Locked

    381 views
    2 replies
    Latest over 5 years ago
    by Hajime Shimaya
  • Not Answered

    TXS0108E: SD card interface issue with TXS0108EPWR level translator 0 Locked

    3271 views
    15 replies
    Latest over 5 years ago
    by ShreyasRao
  • Suggested Answer

    SN74HC138: IBIS model for SN74HC138NS, SN74HC139NS 0 Locked

    859 views
    5 replies
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN74AC08: ESD Information 0 Locked

    314 views
    1 reply
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    SN74LVC1T45-EP: Max Load Capacitance 0 Locked

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

    SN74AVC2T244: Maximum input voltage for /OE if VCCA is 1.8V 0 Locked

    283 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Not Answered

    CD4059A: counter 'freezing' with quickly changing jam inputs (part 2) 0 Locked

    582 views
    6 replies
    Latest over 5 years ago
    by Ryan Sarver1
  • Suggested Answer

    SN74ALVC244: Can SN74ALVC244 used in Hot insertion application 0 Locked

    349 views
    3 replies
    Latest over 5 years ago
    by Chad Crosby
  • Suggested Answer

    SN74AHC245: About the input tolerant function of SN74AHC245. 0 Locked

    761 views
    3 replies
    Latest over 5 years ago
    by Clemens Ladisch
  • Answered

    SN74LVC2G06: Best way to lower V_IH? 0 Locked

    607 views
    2 replies
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74LVC1G123: Cext limitation 0 Locked

    341 views
    1 reply
    Latest over 5 years ago
    by Dylan Hubbard
  • Suggested Answer

    TXB0104: Inrush current 0 Locked

    241 views
    1 reply
    Latest over 5 years ago
    by Clemens Ladisch
  • Suggested Answer

    SN74LVC1G17: Vt+ range 0 Locked

    407 views
    1 reply
    Latest over 5 years ago
    by Chad Crosby
  • Answered

    SN74AXC8T245: SN74AXC8T245RHLR 1.8V IBIS model 0 Locked

    456 views
    4 replies
    Latest over 5 years ago
    by Chad Crosby
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