1] Ronald. J. Tocci, Neal. S. Widmer, Gregory L. Moss, Digital Systems Principles and Applications, Pearson Education, 10th Edition.

2] Tokheim, Digital Electronics, Principles and Applications, TATA McGraw-Hill Edition.

3] R. P. Jain, Tata McGraw-Hill Education, Modern Digital Electronics, 3rd Edition.

4] National Semiconductors Data sheet