74HC85D,653

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT85 4-bit magnitude comparator Product specification File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification 4-bit magnitude comparator 74HC/HCT85 weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits. FEATURES • Serial or parallel expansion without extra gating The operation of the “85” is described in the function table, showing all possible logic conditions. The upper part of the table describes the normal operation under all conditions that will occur in a single device or in a series expansion scheme. In the upper part of the table the three outputs are mutually exclusive. In the lower part of the table, the outputs reflect the feed forward conditions that exist in the parallel expansion scheme. • Magnitude comparison of any binary words • Output capability: standard • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT85 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. For proper compare operation the expander inputs (IA>B, IA=B and IAB, QA=B and QAB, QA B expansion input 5 QA>B A > B output 6 QA=B A = B output 7 QAB IAB QAB3 A3B2 A2B1 A1B0 A0B or QAB or QA