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Showing 10 results View by: Thread Post Sort by
  • RE: SN74LV221A: SN74LV221A Issue Resolution and CD74HCT221 Recommendation

    Owen Westfall
    Owen Westfall
    Hi Obi, Yes it can meet those requirements, and I'll have someone from our team reach out to you about the schedule of those TPUL devices. I did note the AFBR2528 has TTL outputs, so it may be best to use the CD74HCT221 as you originally asked as that…
    • 7 days ago
    • Logic
    • Logic forum
  • Answered
  • RE: CD74HCT221: pulse width theoritical calc vs measured values dont match at first multivibrator output ?

    vinay kattela
    vinay kattela
    Resolved
    Yes I agree Emrys, I just shared as reference and at times it might helps others too. Meanwhile I have planned to have some tolerance captured in the test spec. Really helpful discussion, thank you( Emrys & Albert ) for your patience in reviewing and…
    • over 1 year ago
    • Logic
    • Logic forum
  • CD74HCT221: Pull-up Resistor on Pin 3

    TI-CSC
    TI-CSC
    Answer Suggested
    Part Number: CD74HCT221 Hello E2E Experts, Good day. I am using the PIN 3 connected to Vcc without a pull-up and it works great. But then I asked myself if I had to use a pull-up but I wasn't able to find the information in the datasheet. Do I have…
    • over 1 year ago
    • Logic
    • Logic forum
  • Answered
  • CD74HCT221: ESD data request

    yutaro hayashi
    yutaro hayashi
    Resolved
    Part Number: CD74HCT221 Hi Support Team. In the Qualification Summary, the results of ESD-HBM and CDM are described as "See data sheet". However, the datasheet does not show the results of ESD. Please tell me ESD data (HBM data , CDM data) of…
    • Resolved
    • over 2 years ago
    • Logic
    • Logic forum
  • CD74HCT221: CD74HCT221E Logic Diagram

    Scott Taylor
    Scott Taylor
    TI Thinks Resolved
    Part Number: CD74HCT221 There is an error in the logic diagram. I know usage is on the decline and that Harris, or RCA before them, probably made the original error but I thought I would report it anyway. The A and B inputs are both driving the same line…
    • over 4 years ago
    • Logic
    • Logic forum
  • RE: SN74221: SN74221NE4 regarding the pulse width related query

    vinay kattela
    vinay kattela
    I did replace U1 IC with CD74HCT221, with same 10% Cap in place, 1% resistor in place. Only change was the U1 IC part number, CD74HCT221 IC works as expected, output is very consistent with variation in the trigger frequency. It will be really good to understand…
    • over 1 year ago
    • Logic
    • Logic forum
  • Answered
  • RE: SN74221: SN74221NE4 regarding the pulse width related query

    Clemens Ladisch
    Clemens Ladisch
    Resolved
    As shown in the switching characteristics table for t w , the tolerances are much larger than that. (Why are you using an old TTL device? The CD74HCT221 would use much less power.)
    • over 2 years ago
    • Logic
    • Logic forum
  • RE: SN74LV221A: PULSE CUT SHORT, RETRIGGERS WHEN IT SHOULD NOT

    Emrys Maier
    Emrys Maier
    Hi John and welcome to the forums! I can't give details regarding internal projects, however I can say that we are definitely looking into the issue. The LV221 is the only device that's shown this problem. I would recommend to instead use the HC…
    • over 4 years ago
    • Logic
    • Logic forum
  • Answered
  • RE: SN74LV221A: Replacing SN74HCT221A

    Chad Crosby
    Chad Crosby
    Resolved
    Hi Harry, Is there a reason you're switching from the CD74HCT221 to the SN74LV221A? Thanks! Chad Crosby
    • over 4 years ago
    • Logic
    • Logic forum
  • [FAQ] [H] Monostable Multivibrators - Top Questions Resolved

    Albert Xu1
    Albert Xu1
    TI Thinks Resolved
    Quickly find solutions to common questions about monostable multivibrator (one-shot) devices by clicking this link. This FAQ answers the most common questions asked about these devices ……………… Use Cases & …
    • over 4 years ago
    • Logic
    • Logic forum

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