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Which of the following IC is TTL based static RAM?(a) IC 7488(b) IC 7489(c) IC 7487(d) IC 2114I have been asked this question in exam.My enquiry is from Random Access Memory in section Memory Devices of Digital Circuits

Answer»

Correct option is (B) IC 7489

For EXPLANATION I would say: The flip-flop in the static memory cell can be constructed using Bipolar JUNCTION Transistor (BJT) and MOSFETs because of it’s STORING capability. Also, it’s access time is less and it is faster in operation. In IC 7489, TTL is used which is static RAM.



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