For Digital Electronics or Digital Systems courses requiring a comprehensive, class and time tested text with an emphasis on the "Digital System".

Tocci: Digital Systems, hands down the most widely used textbook in Digital Electronics, uses a block diagram approach to enable students to gain a firm understanding of logic principles before they study the electrical characteristics of the logic ICs. For each new device or circuit, the authors describe the principle of the operation, give thorough examples, and then show its actual application.