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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] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ This question is really about the input structure of a logic device. There are primarily two types of CMOS input structures - one with a positive clamping diode, and one without…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] Where do I connect the thermal pad of the logic QFN devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Power and Thermals >> Current FAQ Some datasheets do not specify what should be done with the thermal pad, such as in the image below: The thermal pad is recommended to be soldered to the PCB and electrically…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the maximum capacitive load that a logic device can drive?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC2G34 FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ There are a few issues with trying to determine a maximum capacitive load for a standard CMOS logic device. First is propagation delay…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] Why does a logic device's part number have an E4/G4 suffix?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Quality and Manufacturing >> Current FAQ In short, there will be no difference between a device labelled SN74xxG4 and SN74xx. Historically, G4 and E4 suffixes meant that the devices were rated to be "Green" or…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between TXS TXB and LSF devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] Is part number X pin to pin compatible with part number Y?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Quality and Manufacturing >> Current FAQ It's extremely common to need to know if one device can be directly replaced with another. With Standard Logic devices, this is generally an easy process. The part number…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the output transition rate for a logic device?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G08 FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ Very few logic devices specify an output transition rate, and those that do only specify it under very specific conditions. The best…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] Why do the leadframes look strongly oxidized or corroded?

    Karan Kotadia
    Karan Kotadia
    FAQ: Logic and Voltage Translation > Quality and Manufacturing >> Current FAQ Texas instruments has decided to change from non-roughened leadframe to single-side roughened leadframe for some of its parts. For this reason these devices look as if they…
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the TXS device internal resistor variation/ tolerance

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ According to the design simulation, the variation of the 10K internal resistor of the TXS device can be between 6.5k to 15kohm across PVT.
    • over 7 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the maximum junction temperature (TJMAX) for a device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Power and Thermals >> Current FAQ The vast majority of logic devices do not list a maximum junction temperature ( T J(max) ) on the datasheet. For logic devices, T J(max) is equal to the maximum storage temperature…
    • Answered
    • over 7 years ago
    • Logic
    • Logic forum
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  • Not Answered

    [FAQ] Frequently Asked Questions: TPLD 0 Locked

    2814 views
    0 replies
    Started over 1 year ago
    by Malcolm Lyn
  • Answered

    [FAQ] [H] Frequently Asked Questions: Logic and Voltage Translation 0 Locked

    45345 views
    1 reply
    Latest over 4 years ago
    by Michael J Schultis
  • Not Answered

    SN74LV540A: SN74LV540ARGYR Exposed Pad to GND? 0

    11 views
    0 replies
    Started 1 hour ago
    by Eli Hait54
  • Answered

    SN74LV8T245: Input voltage tolerance on IO pins 0

    80 views
    7 replies
    Latest 2 hours ago
    by Alexis Monaci
  • Suggested Answer

    SN74LV1T34: VCC=open, Input=3.3V 0

    81 views
    8 replies
    Latest 11 hours ago
    by Joshua Salinas
  • Suggested Answer

    TXS0108E: What happen if we did not provide Pull down on OE line? 0

    62 views
    6 replies
    Latest 12 hours ago
    by Jack Guan
  • Not Answered

    CD74AC14: CD74AC14M96 updates in datasheet (June 2026) 0

    3 views
    0 replies
    Started 12 hours ago
    by Erika Alejandre
  • Suggested Answer

    SN74AVC4T774: Letter of Volatility Request 0

    10 views
    2 replies
    Latest 12 hours ago
    by Joshua Salinas
  • Answered

    SN74AVC4T245: SN74AVC4T245PWR unpredictable consumption on sleep mode 0

    58 views
    7 replies
    Latest 14 hours ago
    by Joshua Salinas
  • Answered

    SN74AXC4T774: SN74AXC4T774 /OE pin is tied to GND directly 0

    11 views
    1 reply
    Latest 17 hours ago
    by Clemens Ladisch
  • Suggested Answer

    SN74HC42: sn74hc42 problem 0

    10 views
    1 reply
    Latest 18 hours ago
    by Nikki Dengel
  • Suggested Answer

    SN74AHCT1G126: OE pin tied to VCC 0

    9 views
    1 reply
    Latest 19 hours ago
    by Chris Pui
  • Not Answered

    MSPM0G5187: Clarification on Generating Separate Main and Non-Main DFU Images 0

    12 views
    1 reply
    Latest 1 day ago
    by Pengfei Xie
  • Not Answered

    SN74HC244: As per the received PCN No--20260608001.0 from TEXAS INSTRUMENTS for the part number SN74HC244N. The change is data sheet has been revised to Rev.I by changing 0

    47 views
    2 replies
    Latest 1 day ago
    by Keerthi Grandhi
  • Suggested Answer

    TPSM63603E: Switch node 0

    28 views
    4 replies
    Latest 1 day ago
    by Frank De Stasi
  • Not Answered

    SN74LVC2G34: SN74LVC2G34DCKR Thermal Resistance Data 0

    12 views
    0 replies
    Started 1 day ago
    by Claudia Dufour
  • Not Answered

    CD4051B: Significant device behavioural change masquerading as a non-issue between datasheet revisions 0

    79 views
    4 replies
    Latest 1 day ago
    by Nir Gilgur
  • Answered

    TPLD2001: No simulation in interconnect studio 0

    32 views
    2 replies
    Latest 1 day ago
    by Clément Letonnelier
  • Not Answered

    SN74HC74-Q1: Failure in time (FIT) number for SN74HC74QPWRQ1 0

    15 views
    0 replies
    Started 2 days ago
    by Nikhil Jose
  • Not Answered

    SN74LVC1G14: Inverter need more current 0

    16 views
    0 replies
    Started 2 days ago
    by Pascal Schneider
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