BUY CD74HC283M96 https://www.utsource.net/itm/p/11644176.html

Description: The CD74HC283M96 is a high-speed CMOS 4-bit binary full adder with fast carry. Features: High-speed operation: tpd = 8.3 ns (typical) at VCC = 5 V Low power consumption: ICC = 4 μA (maximum) at TA = 25°C Wide operating voltage range: VCC (opr) = 2 V to 6 V Inputs accept voltages up to 7 V Outputs source/sink 24 mA Latch-up performance exceeds 100 mA per JESD 78, Class II Applications: High-speed arithmetic operations Fast carry look-ahead circuits High-speed counting High-speed data transfer (For reference only)