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datasheet, circuit, data sheet: TI – SYNCHRONOUS 4-BIT COUNTERS,alldatasheet, datasheet, Datasheet search site for Electronic. These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters.

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Multisim and Ultiboard

Message 9 of In the schematics the rco is connected to ENT. Message 2 of 74116 Most Active Software Boards: Can you provide me with the following information to help the troubleshooting? In my search for understanding more I discovered a recent document that had identified an error in the multisim model related to the counter executing on falling edge of clock, should be rising edge.

Something wrong with the model? But, when the dafasheet counter’s RCO carries over to the third datqsheet ENT it stays high for a long period of time the duration of the QA and sets off the third counter to “race at clock speed” similar to the first counter.


I am asking because I found another post in this board that noted that the issue was resolved.

74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Message 8 of I appreciate any insights. Thanks for sharing these files over here!

This is not the case when connecting to ENP. They should form a simple 16 bit binary counter that keeps incrementing until all of the output bits for E4 are all zeros and then it loads all the counters with preset value.

Message 6 of Is the model that is being used in there shareable? Please find attached the multisim model. Do you have any information about the simulation tool you are comparing to?

Fairchild Semiconductor

I am building a simulation of an old 70s design based on s and I have had a lot of trouble getting a set of counters to operate according to my expectations. Message 10 of Question to the forum: Message 4 of Message 1 of Message 3 of When connected to ENT as it appears to be done in the orignal schematics p21, B4 to E4 the third counter starts to race at clock speed when RCO set ENT high as can be seen in the attached simulation screen shot.


Message 5 of Message 7 of I am especially looking for information concerning the “old 70s design” you want to simulate.

The case is not solved – and I 47161 now asked the moderator to remove the duplicate. I tried to simulate the similar cascade in another simulation tool – and i get the reverse and expeced results; that when RCO is connect to ENT, the carry is forwarded and no “racing” occurs. I am new to NI tools and new to the forums. Thanks in advance for your feedback! For some reason i couldnt attach files with my message above, and i cannot post them separately either it appears Unfortunately it did not solve my headache.