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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 configure a monostable multivibrator's inputs for rising/falling edge triggering?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Logic function table for the SN74LVC1G123 Most monostable multivibrator (MMV) devices have very similar logic tables to…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] With Open-Drain outputs, can I ...use them to shift a logic voltage level? ...connect the outputs directly together? ...force a voltage node to zero?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LVC1G123 FAQ: Logic and Voltage Translation > Output Parameters >> Current FAQ The answer to all three questions is "yes" - these are the three primary uses of open-drain outputs on logic devices. Much of this also…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] Can I connect the Cext pin to ground on a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A , SN74LVC1G123 , SN74LV123A , SN74221 , SN74LS221 FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ For the majority of MMV devices, y es, the Cext pin can be grounded. The Cext…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do you determine the output pulse width and the 'K' value for a monostable multivibrator?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The output pulse width (tw) is determined with the following equation: tw = K * R * C with R := external timing resistor, C := external timing capacitor, K := timing constant…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How do I terminate an unused channel of a monostable multivibrator (one shot)?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN74LV221A FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ Unused channels for a logic monostable multivibrator (MMV) such as the SN74LV221A should be terminated such that: (1) All inputs…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] How does a monostable multivibrator (one shot) work?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Monostable Multivibrators >> Current FAQ The above functional block diagram shows generally how a monostable multivibrator (MMV, or one-shot) works. Not all of them have every part shown, but this is the most common…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What's the difference between TTL and 5V CMOS logic?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ It's very common for people to refer to "TTL logic" and to actually mean "5V logic" -- but how are they different? The key difference is in the input and output voltages. This graphic…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference in timing between gates in the same device? How much skew is expected within a given logic device? What is the part-to-part skew?

    Karan Kotadia
    Karan Kotadia
    FAQ: Logic and Voltage Translation > Timing Parameters >> Current FAQ The difference in delay between the individual channels on an individual part is referred to as channel-to-channel skew or output skew. This is typically not covered as a datasheet…
    • over 5 years ago
    • Logic
    • Logic forum
  • [FAQ] What is the difference between the SN74HCxx and the SN74HCxxA?

    Emrys Maier
    Emrys Maier
    Other Parts Discussed in Thread: SN7400 , SN74LS00 FAQ: Logic and Voltage Translation > Logic Technology >> Current FAQ The High-speed CMOS (HC) logic family was created as a direct replacement for older bipolar junction transistor based transistor…
    • over 6 years ago
    • Logic
    • Logic forum
  • [FAQ] What method is best used for estimating specification values between those given in the datasheet?

    Emrys Maier
    Emrys Maier
    FAQ: Logic and Voltage Translation > Input Parameters >> Current FAQ The most common example of this question comes from the fact that Standard Logic devices are specified at 1.65V, 3V, and 4.5V, however most engineers use our devices at 1.8V, 3.3V…
    • over 6 years ago
    • Logic
    • Logic forum
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  • Answered

    SN74LVC1G79: output aumatically sets to high when power on 0 Locked

    55 views
    1 reply
    Latest 1 month ago
    by Nikki Dengel
  • Suggested Answer

    SN74HCS02-Q1: Are they available in smaller package 0 Locked

    161 views
    6 replies
    Latest 1 month ago
    by Albert Xu1
  • Answered

    SN74ALS1034: required ESD ratings 0 Locked

    94 views
    2 replies
    Latest 1 month ago
    by Jyothi Arjilli
  • Not Answered

    TPLD2001-DGS-EVM: How to operate the circuit on the evaluation board 0 Locked

    76 views
    1 reply
    Latest 1 month ago
    by Albert Xu1
  • Suggested Answer

    SN74HCS08: Shortcut on power supply + 1 input with very low impedance to VCC and GND 0 Locked

    41 views
    1 reply
    Latest 1 month ago
    by Albert Xu1
  • Answered

    LM65645: 3D File 0 Locked

    185 views
    6 replies
    Latest 1 month ago
    by Youhao Xi
  • Answered

    SN74HCT244: SN74HCT244 Test Datasheet 0 Locked

    47 views
    1 reply
    Latest 1 month ago
    by Albert Xu1
  • Answered

    SN74LVC4245A: DIE Revision on specific lot vs PCN 20230322001.1 0 Locked

    63 views
    1 reply
    Latest 1 month ago
    by Joshua Salinas
  • Suggested Answer

    SN74AVCH2T45: Vcc slew rate slower than recommend 0 Locked

    67 views
    1 reply
    Latest 1 month ago
    by Joshua Salinas
  • Suggested Answer

    SN74AVC4T245: abnormal waveform 0 Locked

    127 views
    5 replies
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    by Joshua Salinas
  • Suggested Answer

    SN7417: SN1701022RSBT VVM type and size? 0 Locked

    136 views
    3 replies
    Latest 1 month ago
    by Nick Zahabizadeh
  • Suggested Answer

    SN74AUC1G125: Buffer or level translator that work for logics less than 0.8V 0 Locked

    96 views
    2 replies
    Latest 1 month ago
    by Joshua Salinas
  • Answered

    TPLD1201: Some question about TPLD1201.. 0 Locked

    82 views
    1 reply
    Latest 1 month ago
    by Nikki Dengel
  • Suggested Answer

    SN74LVT8986: Thermal Enquiries for SN74LVT8986PM 0 Locked

    109 views
    4 replies
    Latest 1 month ago
    by Owen Westfall
  • Suggested Answer

    SN74LVC1G123: Datasheet Clarification for Discharge on Rext/Cext pin & output pulse constant 0 Locked

    117 views
    1 reply
    Latest 1 month ago
    by Clemens Ladisch
  • Suggested Answer

    SN74AVC4T245: Power VCCB when VCCA is off 0 Locked

    50 views
    1 reply
    Latest 1 month ago
    by Joshua Salinas
  • Answered

    SN74LV1T126: SN74LV1T126 Part variance.. 0 Locked

    87 views
    5 replies
    Latest 1 month ago
    by Joshua Salinas
  • Suggested Answer

    SN74LVC1G175: SN74LVC1G175DCKR : have part with 2249 date code and can i use it ? 0 Locked

    65 views
    1 reply
    Latest 1 month ago
    by Owen Westfall
  • Not Answered

    SN74LVC16245A: I can't use 8 bits. 0 Locked

    49 views
    1 reply
    Latest 1 month ago
    by Owen Westfall
  • Suggested Answer

    SN74AVC24T245: Is VOL(max) characterization available for 0-50C (or similar) 0 Locked

    93 views
    3 replies
    Latest 1 month ago
    by Joshua Salinas
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