I couldn’t find a specific PDF titled "Digital Logic Design" by Aaron Tan available for free download through legal public sources. Aaron Tan is known for contributing educational materials, often in computer engineering or digital logic, but the exact PDF you mentioned might be:
In later versions of the PDF (post-2015), Tan integrated Verilog. He doesn't teach programming; he teaches hardware concurrency.
This section acts as the grammar of digital logic.
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To understand the value of the PDF, you first need to understand the author. Aaron Tan is a renowned educator and lecturer associated with the National University of Singapore (NUS) , specifically within the Department of Computer Science, School of Computing.
For years, Tan has taught foundational modules like CS2100: Computer Organisation and its predecessors. His teaching style is known for breaking down complex abstractions (like flip-flops, Karnaugh maps, and state machines) into digestible, visual-heavy explanations. While the official course materials are locked behind university portals, students have compiled and shared his lecture notes and tutorial solutions—colloquially known as the "Aaron Tan PDF"—across the internet.
Important Note: There is no single official "Aaron Tan Textbook." Instead, the keyword refers to a compilation of his lecture slides, tutorial answers, and concise reference sheets that have been aggregated into PDF format by students for offline study.