ADWSystems
Member
How would one go about finding a PLD that would allow one to roll their own CD4020/CD4040 12/14 stage ripple counter?
This is the phase of the design process that bogs me down the most. Finding chips that will fit the bill. I know their out there but haven't found a good way of identifiying them. I've been looking but can't tell which one(s) would suit the purpose. The main point is that the first few stages of the 4020 are not on exposed pins. The last time I worked with PLD, the 8V10 was just starting to fade but still quite prominent. That doesn't appear to be the case today. In addition it would appear that to implement the CD4020 in a 8V10 type chip would require all stages to be exposed on an output pin; which is not what I want. So how would one go about finding a PLD (not microcontroller but combinatorial logic chip) that would fit this bill?
This is the phase of the design process that bogs me down the most. Finding chips that will fit the bill. I know their out there but haven't found a good way of identifiying them. I've been looking but can't tell which one(s) would suit the purpose. The main point is that the first few stages of the 4020 are not on exposed pins. The last time I worked with PLD, the 8V10 was just starting to fade but still quite prominent. That doesn't appear to be the case today. In addition it would appear that to implement the CD4020 in a 8V10 type chip would require all stages to be exposed on an output pin; which is not what I want. So how would one go about finding a PLD (not microcontroller but combinatorial logic chip) that would fit this bill?
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