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What is the difference between a 7490 and a 7493?

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What is the difference between a 7490 and a 7493?

(a) 7490 is a MOD-10, 7493 is a MOD-16

(b) 7490 is a MOD-16, 7493 is a MOD-10

(c) 7490 is a MOD-12, 7493 is a MOD-16

(d) 7490 is a MOD-10, 7493 is a MOD-12

The question was asked during an interview.

My query is from Counter ICs in chapter Counters of Digital Circuits

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Right choice is (a) 7490 is a MOD-10, 7493 is a MOD-16

Explanation: The difference between a 7490 and a 7493 is that 7490 is a MOD-10, 7493 is a MOD-16 counter. Thus, 7490 traverses 10 states and 7493 traverses 16 states.

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