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Engineering and Comp Sci Homework Help
Constructing a JK Flip-Flop: Troubleshooting Unexpected Outputs
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[QUOTE="Baluncore, post: 6874023, member: 447632"] Do not mix logic families unless you have a very good reason for doing it. The TTL outputs will not go high enough for an HC input to see a high. The TTL outputs will need pull-up resistors to get within the 1 volt of Vcc required of HC. Alternatively, use HCT which have HC power consumption with TTL thresholds. There may also be situations where speed differences between families causes race conditions. [/QUOTE]
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Constructing a JK Flip-Flop: Troubleshooting Unexpected Outputs
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