MC14585BDG ON Semiconductor

MC14585B 4-Bit Magnitude Comparator The MC14585B 4Bit Magnitude Comparator is constructed with complementary MOS (CMOS) enhancement mode devices. The circuit has eight comparing inputs (A3, B3, A2, B2, A1, B1, A0, B0), three cascading inputs (A < B, A = B, and A > B), and three outputs (A < B, A = B, and A > B). This device compares two 4bit words (A and B) MC14585B BLOCK DIAGRAM (A > B) 4 in 6 (A = B) in (A < B) (A > B) 13 5 in out A0 10 B0 11 7 A1 (A = B) 3 out 9 B1 2 A2 1 B2 (A < B) 12 out 15 A3 14 B3 V = PIN 16 DD V = PIN 8 SS TRUTH TABLE (x = Dont Care) Inputs Comparing Cascading Outputs A3, B3 A2, B2 A1, B1 A0, B0 A < B A = B A > B A < B A = B A > B A3 > B3 x x x x x x 0 0 1 A3 = B3 A2 > B2 x x x x x 0 0 1 A3 = B3 A2 = B2 A1 > B1 x x x x 0 0 1 A3 = B3 A2 = B2 A1 = B1 A0 > B0 x x x 0 0 1 A3 = B3 A2 = B2 A1 = B1 A0 = B0 0 0 x 0 0 1 A3 = B3 A2 = B2 A1 = B1 A0 = B0 0 1 x 0 1 0 A3 = B3 A2 = B2 A1 = B1 A0 = B0 1 0 x 1 0 0 A3 = B3 A2 = B2 A1 = B1 A0 = B0 1 1 x 1 1 0 A3 = B3 A2 = B2 A1 = B1 A0 < B0 x x x 1 0 0 A3 = B3 A2 = B2 A1 < B1 x x x x 1 0 0 A3 = B3 A2 < B2 x x x x x 1 0 0 A3 < B3 x x x x x x 1 0 0