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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] How do I terminate any unused channels of a logic device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ CMOS Inputs All CMOS inputs must be terminated at either Vcc or Ground. The inputs of a CMOS device are high-impedance. These terminations can be through a resistor (for example…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] Are there voltage level translation / level shifter device recommendations for the industry standard interfaces like GPIO, SPI, UART, I2C, MDIO, RGMII, I2S etc?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ Here are the voltage level translation device recommendations for various industry standard interfaces: Interface Recommended Device 3.6V Maximum 5.5V Maximum…
    • Answered
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the default output of a latched device? (Flip-Flop, latch, register)

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ Flip-flops, latches, and registers do not have a default state on power up. The output is in an 'unknown' state until data is clocked through. Because of this, SPICE simulation models…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] How does a slow or floating input affect a CMOS device?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ There are two primary issues associated with slow and floating inputs. Not sure what a 'floating input' is? Please see our FAQ: What is a floating input or floating node? (1) Shoot…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] If the OE pin is asserted to maintain Hi-Z at the IO, will it disconnect the internal pull-up resistors in TXS devices?

    ShreyasRao
    ShreyasRao
    FAQ: Logic and Voltage Translation > Voltage Translators >> Current FAQ Yes, the internal pull-up resistors are disconnected once OE is asserted(to enable High impedance on the IO ports) Additionally, if the device supports Vcc isolation feature …
    • over 6 years ago
    • Logic
    • Logic forum
  • [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
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  • Answered

    TXV0106: data sheet 1st page drawing correct? 0 Locked

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

    SN74LVC1G17: Electrical characteristics difference between packages 0 Locked

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

    SN74AXC8T245-Q1: Definition of "Input transition rise or fall rate" 0 Locked

    391 views
    3 replies
    Latest over 1 year ago
    by Kazuki Kuramochi
  • Suggested Answer

    CD4536B: Power Up State 0 Locked

    242 views
    1 reply
    Latest over 1 year ago
    by Noel Fung
  • Answered

    SN74ACT373: IBIS model 0 Locked

    249 views
    1 reply
    Latest over 1 year ago
    by Malcolm Lyn
  • Suggested Answer

    SN54SLC8T245-SEP: Determining max frequency 0 Locked

    223 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN74AUC125: sn74auc125rgy thermal information 0 Locked

    220 views
    1 reply
    Latest over 1 year ago
    by Hannah Bludau
  • Suggested Answer

    TXB0106: Output Current in the operating condition 0 Locked

    298 views
    3 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Answered

    LSF0101: LSF 0 Locked

    316 views
    2 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74LVC1G08: SN74LVC1G08 output slew rate (rise/fall time) 0 Locked

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

    TXB0304: QSPI Trace limitation and evaluation of one short level-shift 0 Locked

    794 views
    12 replies
    Latest over 1 year ago
    by Clemens Ladisch
  • Suggested Answer

    TXS0108E: Failed to reach normally after restarting 0 Locked

    317 views
    5 replies
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74AHC1G04: P2P invert gaterecommendation for SGM7SZ04 0 Locked

    250 views
    1 reply
    Latest over 1 year ago
    by Owen Westfall
  • Answered

    SN74LVC1G17: ICC current 0 Locked

    499 views
    6 replies
    Latest over 1 year ago
    by Owen Westfall
  • Suggested Answer

    UC2843A: UC2843AD8 0 Locked

    150 views
    1 reply
    Latest over 1 year ago
    by Steven Mappus1
  • Suggested Answer

    TXS0104E-Q1: Needed IBIS model for SI simulation 0 Locked

    352 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74LVC2T45: Recent PCN has change to terminal finish from NiPdAu to Sn. 0 Locked

    310 views
    1 reply
    Latest over 1 year ago
    by Michael Ikwuyum
  • Suggested Answer

    SN54SLC8T245-SEP: VDDA and VDDB 0 Locked

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

    TXB0106: SPICE Model 0 Locked

    399 views
    1 reply
    Latest over 1 year ago
    by Jack Guan
  • Suggested Answer

    SN74AVCH8T245: Transition Timing 0 Locked

    374 views
    7 replies
    Latest over 1 year ago
    by Clemens Ladisch
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