Part Number: SN74121 Tool/software: Problem:
1. I have a temp sensor that gives an alarm where a temp threshold is reach. So the output goes from 0 to 1.
2. The 1 feeds into a latch. The D latch further feeds a clock counter/ timing circuit what creates…
Part Number: SN74121 Other Parts Discussed in Thread: SN74LVC1G123 Hi expert,
I am attempting to use pin 5 (input B) of the SN74121D as a trigger source, and have connected a 2kohm resistor from pin 5 to ground to pull the pin low.
However, I am still…
Part Number: SN74121 Hi E2E,
Good day!
A customer of mine wants to know the logic high level for A input and B input. It is understood that the logic high level for A input is 2V minimum. How about the for B input?
Looking forward to your response…
Part Number: SN74121 Other Parts Discussed in Thread: SN74LVC1G123 I'm trying to create a triggered one shot pulse schematic. I believe this is the correct component to use but I also need the design to only be able to be triggered once every couple seconds…
"Flip the polarity"???
From the very little information one can find in the datasheet, the positive side of the capacitor should be on Cext!
I see 2 problems:
1. Connect the node R/C to pin 11, not 9.
2. The input will never see a low level logic…
Other Parts Discussed in Thread: SN74121 Hi,
I am decreasing the duty cycle of TTL input signal (100kHz, duty cycle 50%) to 10%. The input signal was generated using a function generater(Stanford Research System, DS345). According to the datasheet of…
Part Number: SN74121 Hello,
Apologies if I've placed this in the wrong section.
I'm currently working on a university project to build a pulse extender with the ability to alter the output using a programmable potentiometer board. (RS232 - 8 Channel…
All of the three listed above can operate from about 2V to 5V Vcc. They do the same as the 121.
they have 3 inputs with one of them inverted. and 2 ouputs with one of them inverted. ecxept for the 1G123 that has only 1 output..
I am not sure which…
Other Parts Discussed in Thread: SN74121 , SN74LV123A , TPS3422 , SN74LVC1G123 Hi Team,
we are looking for TI cross for MAX6467XS22D3+T.
Our requirement: When input signal goes from high to low, output needs to go low immediately and stay low for…
Hi Wesley,
The CD4001B and SN74LS04 have PSpice models available for anyone to download, and are available under their Design & development tab. You can see how to load these files in using the below FAQ:
As for the SN74121, unfortunately, we…
