器件名称:
74HC283D
功能描述:
4-bit binary full adder with fast carry
文件大小:
111.19KB 共20页
简 介:
74HC283 4-bit binary full adder with fast carry Rev. 03 — 11 November 2004 Product data sheet 1. General description The 74HC283 is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). The 74HC283 is specied in compliance with JEDEC standard no. 7A. The 74HC283 adds two 4-bit binary words (An plus Bn) plus the incoming carry (CIN). The binary sum appears on the sum outputs (S1 to S4) and the out-going carry (COUT) according to the equation: CIN + (A1 + B1) + 2(A2 + B2) + 4(A3 + B3) + 8(A4 + B4) = = S1 + 2S2 + 4S3 + 8S4 + 16COUT Where (+) = plus. Due to the symmetry of the binary add function, the 74HC283 can be used with either all active HIGH operands (positive logic) or all active LOW operands (negative logic). In case of all active LOW operands the results S1 to S4 and COUT should be interpreted also as active LOW. With active HIGH inputs, CIN must be held LOW when no carry in is intended. Interchanging inputs of equal weight does not affect the operation, thus CIN, A1, B1 can be assigned arbitrarily to pins 5, 6, 7, etc. See the 74HC583 for the BCD version. 2. Features s s s s s s High-speed 4-bit binary addition Cascadable in 4-bit increments Fast internal look-ahead carry Low-power dissipation Complies with JEDEC standard no. 7A ESD protection: x HBM EIA/JESD22-A114-B exceeds 2000 V x MM EIA/JESD22-A115-A exceeds 200 V. s Multiple package options s Specied from 40 °C to +80 °C and from 40 °C to +125 °C. Philips Semiconductors ……
