Hi i was given this assignment by my teacher to find the replacement of 74LS90 the question is given :
Do You Know The Substitute?
Joseph was given the task to build the electronics prototype of a single digit counter. The lead-time given to him was three weeks. Happily, he designed the electronics circuit of a single digit counter as shown in figure 1. However, he is now in a dilemma as he is facing some problem with this circuit.
“I had a big problem with the electronics prototype of the single digit counter which I am supposed to design and build.” said Joseph.
“What’s the problem, the circuit design looks good?” asked John.
“I could not buy all the components in time to build the circuit.” replied Joseph.
“Have you tried the different suppliers and multi-channel distributors? Some of them have website whereby you could conveniently do an on-line search for components and the lead-time for delivery” asked John.
“Yes, I have tried that. Some of the components, 74LS90 and 74LS47 in my design have either long lead time or are already obsolete. I am given only three weeks to build the prototype circuit.” answered Joseph.
“Have you tried looking for the substitute or compatible parts? You may need to re-design part of the circuit as well.” said John.
Imagine that you were Joseph, what alternatives would you try to overcome this problem? Proceed to re-design the single digit electronics counter circuit. Ensure that all the components used in your design are available with short lead-time in order to meet the requirement of the three weeks schedule.
**broken link removed**
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I searched the internet for relevent resources but it doesn't seems to link with the question . Can any kind soul help me out ? thxs !
Do You Know The Substitute?
Joseph was given the task to build the electronics prototype of a single digit counter. The lead-time given to him was three weeks. Happily, he designed the electronics circuit of a single digit counter as shown in figure 1. However, he is now in a dilemma as he is facing some problem with this circuit.
“I had a big problem with the electronics prototype of the single digit counter which I am supposed to design and build.” said Joseph.
“What’s the problem, the circuit design looks good?” asked John.
“I could not buy all the components in time to build the circuit.” replied Joseph.
“Have you tried the different suppliers and multi-channel distributors? Some of them have website whereby you could conveniently do an on-line search for components and the lead-time for delivery” asked John.
“Yes, I have tried that. Some of the components, 74LS90 and 74LS47 in my design have either long lead time or are already obsolete. I am given only three weeks to build the prototype circuit.” answered Joseph.
“Have you tried looking for the substitute or compatible parts? You may need to re-design part of the circuit as well.” said John.
Imagine that you were Joseph, what alternatives would you try to overcome this problem? Proceed to re-design the single digit electronics counter circuit. Ensure that all the components used in your design are available with short lead-time in order to meet the requirement of the three weeks schedule.
**broken link removed**
-------------------------------------------------------------------------------
I searched the internet for relevent resources but it doesn't seems to link with the question . Can any kind soul help me out ? thxs !