74HC85 4-bit Magnitude Comparator IC

The 74HC85 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC85 are 4-bit magnitude comparators that can be expanded to almost any length. They perform comparison of two 4-bit binary, BCD or other monotonic codes and present the three possible magnitude results at the outputs (QA>B, QA=B and QAB, IA=B and IAB = = LOW and IA=B = HIGH. For words greater than 4-bits, units can be cascaded by connecting outputs QAΒ and QA=B to the corresponding inputs of the significant comparator. Features:- • Serial or parallel expansion without extra gating • Magnitude comparison of any binary words • Output capability: standard • ICC category: MSI Specifications:- Symbol Parameter Conditions Typical Unit HC HCT tPHL/ tPLH Propagation Delay to QAB 15 15 ns IA=B to QA=B 11 15 ns CL = 15 pF; VCC = 5 V ns An, Bn to QA>B , QAB 20 22 ns An, Bn to QA=B 18 20 ns IAB to QAB 15 15 ns A=B to QA=B 11 15 ns CI Input Capacitance 3.5 3.5 Pf CPD Power Dissipation Capacitance per package notes 1 and 2 18 20 Pf 74hc85-ic-datasheet * product image for illustration purposes only. actual product may vary.