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: SN74LV221A-Q1 Tool/software: Hi team,
Is there maximum value restriction of Rext and Cext?
We like to make 200ms to 300ms pulse with it. Do you have recommended value of R/C? We are considering 1Mohm/330nF now.
Best regards, Yuto K…
Other Parts Discussed in Thread: SN74LV221A , SN74LVC1G123 , SN74LV123A Hi,
I was wondering why there is a model of the SN74LVC1G123 / SN74LV123A but none of the SN74LV221A? I found this thread "e2e.ti.com/.../faq-why-is-there-no-pspice-model-for-a…
Part Number: SN74LV221A If we have port A low and we pulse the port B a second time during the discharge of the external capacitor, the output pulse is either shorter than expected, or worse just a single very short pulse! We would expect that the second…
Part Number: SN74LV221A Other Parts Discussed in Thread: CD74HCT221 Hello
We have a product using the SN74HCT221A and evaluating whether the SN74LV221A will be a drop in replacement.
This thread describes a difference in the LV part:
SN74LV221A…
Part Number: SN74LV221A Other Parts Discussed in Thread: CD74HC221 , CD74HCT221 , Number: CS0323764 Contact: JOHN LIGUORI First name: JOHN Last name: LIGUORI Short description: PULSE CUT SHORT, RETRIGGERS WHEN IT SHOULD NOT Email: jliguori@firecominc…
Part Number: SN74LV123A Other Parts Discussed in Thread: SN74LV221A Hi,
I have a question regarding the connection to GND of the pin CEXT of the monostable SN74LV123A.
In your SN74LV123A datasheet, the CEXT, apparently should NOT be connected to GND…
Hi Emrys,
Related to your last response:
SN74221NE4 is a PDIP 16 pin device Vs SN74LV221A SOIC.
The suggested part SN74LV221A but this calls for a design change(PWA), as I was actually looking for a drop in.
Also SN74LV221A parts seems have a…
Part Number: SN74LVC1G123 Other Parts Discussed in Thread: SN74LV221A , Hello,
Can the part be configured as non-retriggerable monostable?
I plan to use it for an output pulse between 1 to 3 seconds whenever input is triggered, like using 1.5Mohms…
Hey Shaun,
The SN74LV221A has Schmitt-trigger inputs on all 3 trigger inputs, so that might be an option for you in future projects. It's a larger device - dual channel, but it maybe be worth using instead to avoid any issues.
