MM54HC283/MM74HC2834-Bit Binary Adder with Fast CarryGeneral Des criptionThis full adder performs the addition of two 4-bit binary numbersutilizing advanced silicon-gate CMOS technology. Thesum (R) outputs are provided for each bit and the resultantcarry (C4) is obtained from the fourth bit. These adders featurefull internal look ahead across all four bits. This providesthe system designer with partial look-ahead performanceat the economy and reduced package count of a ripple-carry implementation.The adder logic, including the carry, is implemented in itstrue form meaning that the end-around carry can be accomplishedwithout the need for logic or level inversion. All inputsare protected from damage due to static discharge byinternal diode clamps to VCC and ground.FeaturesY Full-carry look-ahead across the four bitsY Systems achieve partial look-ahead performancewith the economy of ripple carryY Wide supply range: 2V to 6VY Low quiescent power consumption: 8 mA at 25§CY Low input current: 1 mA maximum
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