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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

    SN74ABT2240A: What happens if VI > VCC ? (Bus hold function using and side effect) 0 Locked

    709 views
    6 replies
    Latest over 3 years ago
    by Sway Chen
  • Answered

    SN54ACT241: OPN MSL rating clarification 0 Locked

    254 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Answered

    74ACT11244: Trace under 74ACT11244 0 Locked

    264 views
    2 replies
    Latest over 3 years ago
    by Sayandev Ghosh
  • Suggested Answer

    TXS0104E: TXS0104 Architecture Question 0 Locked

    316 views
    1 reply
    Latest over 3 years ago
    by Clemens Ladisch
  • Answered

    SN74AUP1G08: Voltage translator output with mixed input 0 Locked

    317 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    TXB0104: Circuit design using Level Transceiver (TXB0104RGY) and Open-drain (SN74LVC07A) chip. 0 Locked

    375 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74GTLP22033: Common Pulldown Resistor to GND for Multiple Unused B Port I/Os 0 Locked

    175 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74AVC8T245: Unused-pin 0 Locked

    212 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    TXS0104E: ROHS & REACH 0 Locked

    194 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    TXB0104: Please advise on the circuit 0 Locked

    338 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    TXS0104E: recharge to VccA 0 Locked

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

    SN54LVTH162244: V_OH at Vcc=3.3V 0 Locked

    258 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74AUP1T50: Can I connect a voltage to the NC Pin 1? 0 Locked

    282 views
    1 reply
    Latest over 3 years ago
    by Albert Xu1
  • Answered

    SN74HC164: Output current capability for each channel if all outputs is enabled 0 Locked

    244 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Answered

    SN74AXC4T774: the data rate on the different voltage 0 Locked

    203 views
    1 reply
    Latest over 3 years ago
    by Dylan Hubbard
  • Suggested Answer

    SN74AVC4T774: how many length can this device succeed after output of either A-port or B-port 0 Locked

    209 views
    3 replies
    Latest over 3 years ago
    by Dylan Hubbard
  • Answered

    CD74HCT368: CD74HCT368: VCC voltage is provided from the input 0 Locked

    212 views
    2 replies
    Latest over 3 years ago
    by Sway Chen
  • Answered

    SN74AVC4T245: Ioff parameter SN74AVC4T245 0 Locked

    486 views
    4 replies
    Latest over 3 years ago
    by Albert Xu1
  • Suggested Answer

    SN74LV164A: disfunction due to Noise perturbation 0 Locked

    272 views
    1 reply
    Latest over 3 years ago
    by Emrys Maier
  • Suggested Answer

    SN74AHCT244-Q1: Buffer with higher output current 0 Locked

    450 views
    5 replies
    Latest over 3 years ago
    by Emrys Maier
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