74HC283

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/HCT283 4-bit binary full adder with fast carry Product specification File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification 4-bit binary full adder with fast carry FEATURES High-speed 4-bit binary addition Cascadable in 4-bit increments Fast internal look-ahead carry Output capability: standard ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT283 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 74HC/HCT283 add two 4-bit binary words (An plus Bn) plus the incoming carry. The binary sum appears on the sum outputs (∑1 to ∑4) and the out-going carry (COUT) according to the equation: 74HC/HCT283 CIN + (A1 + B1) + 2(A2 + B2) + +4(A3 + B3) + 8(A4 + B4) = = ∑1 + 2∑2 + 4∑3 + 8∑4 + 16COUT Where (+) = plus. Due to the symmetry of the binary add function, the “283” can be used with either all active HIGH operands (positive logic) or all active LOW operands (negative logic); see function table. In case of all active LOW operands the results ∑1 to ∑4 and COUT should be interpreted also as active LOW. With active HIGH inputs, CIN must be held LOW when no “carry in” is intended. ...