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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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View FAQ threads
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  • Answered

    SN74HC541A: SN74HC541A datasheet is not listed on TI's website 0 Locked

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

    TXS0104E: supports Vcca=Vccb? 0 Locked

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

    SN74AHC74PWR resistance junction to board 0 Locked

    259 views
    3 replies
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74ALVC164245: SN74ALVC164245DGGR 0 Locked

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

    SN74LXC8T245: SN74LXC8T245 0 Locked

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

    SN74LVC1G07: Open drain output pull-up voltage query 0 Locked

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

    SN74AVC8T245: SN74AVC8T245DGVR OVERSHOOT and UNDERSHOOT 0 Locked

    368 views
    1 reply
    Latest over 2 years ago
    by Swathi D
  • Answered

    SN54SLC8T245-SEP: What is the allowed time the product can be exposed to the peak solder temperature? 0 Locked

    410 views
    1 reply
    Latest over 2 years ago
    by Lance Lin
  • Not Answered

    SN74LV08A: SN74LV08A is showing 0.6V at output with VCC=0V and output connected to 3.3V 0 Locked

    326 views
    1 reply
    Latest over 2 years ago
    by Ian Graham
  • Answered

    SN74AVC4T774: PCN for the updated footprint 0 Locked

    546 views
    3 replies
    Latest over 2 years ago
    by Swathi D
  • Answered

    SN74LVCR2245A: Frequency range of input signal 0 Locked

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

    SN54AHC14: SN54AHC14 0 Locked

    222 views
    1 reply
    Latest over 2 years ago
    by Ian Graham
  • Suggested Answer

    SN74HCS09: NC7WZ08L8X alternative 0 Locked

    376 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN54HC109-SP: Maximum clock frequency for the SN54HC109-SP when it is powered by 3.3 volts 0 Locked

    310 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74LVC1G08: The rising edge of the input signal is slow, causing the output signal to jitter 0 Locked

    616 views
    1 reply
    Latest over 2 years ago
    by Jack Campbell
  • Suggested Answer

    SN74LV157A: input voltage vs Vcc 0 Locked

    261 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LVC2G34: shock and vibration document 0 Locked

    328 views
    1 reply
    Latest over 2 years ago
    by Albert Xu1
  • Suggested Answer

    SN74AUCH244: level shifter/ Buffer, SPI , 3.3V <=> 1.2V, CLK=50MHz, drive 16ea device 0 Locked

    929 views
    13 replies
    Latest over 2 years ago
    by Albert Xu1
  • Answered

    SN74AHCT244: Possible datasheet error for device temperature range (or POA error) 0 Locked

    302 views
    1 reply
    Latest over 2 years ago
    by Ian Graham
  • Answered

    TXB0108: Question about minimum input logic levels 0 Locked

    243 views
    2 replies
    Latest over 2 years ago
    by Nicholas Ipri1
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