Part Number: SN74LV221A Other Parts Discussed in Thread: CD74HCT221 , CD74HC221 Tool/software: Dear Texas Instruments Support Team,
I’m designing a trigger box for an MR scanner requiring reliable 5ms pulse stretching. I’ve noted issues with the SN74LV221A…
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…
Part Number: CD74HCT221 Other Parts Discussed in Thread: SN74221 , SN74LV221A
I did replace U1 IC from SN74221NE4 to CD74HCT221, one of the reasons is SN74221NE4 part output signal varies a lot based on the input trigger frequency.
One problem solved…
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 CD74HCT221MT…
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…
Part Number: SN74221 Other Parts Discussed in Thread: CD74HCT221 , When I refer SN74221NE4 datasheet, they suggested to consider as ln2.
From the agile we see the part# we are using is SN74221NE4 , referring to the datasheet :
tw(out) = CextRext In2…
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…
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…
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