While searching for a free PDF is tempting, several legal and ethical issues exist:

This is often the "weed-out" topic for students. While combinational logic depends only on the present input, sequential logic depends on the past history (memory).

Here, theory meets practical circuits. Lee explains how to design adders, subtractors, multiplexers (MUX), demultiplexers (DEMUX), encoders, decoders, and comparators. He emphasizes the concept of "don't care" conditions and hazard-free design. A student who masters this section can design any non-memory digital circuit.

The journey begins with binary, octal, and hexadecimal systems. Lee does not merely define these; he dives into binary arithmetic (addition, subtraction using complements) and error-detecting/correcting codes (like Hamming and Gray codes). This section is critical for anyone who wants to understand how data is represented inside an ALU.

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