HD74HC283 Datasheet, PDF (1/10 Pages) Hitachi Semiconductor – 4-bit Binary Full Adder

HD74HC283
4-bit Binary Full Adder
Description
The sun ( ) outputs are provided for each bit and the resultant carry (C₄) is obtained from the fourth bit.
This adder features full internal look ahead across all four bits. This provides the system designer with
partial look-ahead performance at the economy and reduced package count of a ripple-carry
implementation. The adder logic, including the carry, is implemented in its true for meaning that the end-
around carry can be accomplished without the need for logic or level inversion.
Features
• High Speed Operation: t_pd = 19 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)