4 Bit Binary Adder 74283

The 4 Bit Binary Adder 74283 is a 7400-series logic IC that adds two 4-bit binary numbers and a carry-in, giving a 4-bit sum and a carry-out. Internal look-ahead (fast) carry keeps it quick, and several chips can be chained to build 8-bit or wider adders. It works like the classic 7483 adder but uses the standard corner power pins, and it is a common part in digital electronics labs.

4 Bit Binary Adder 74283 Specifications

• Function: 4-bit binary full adder with fast carry
• Inputs: A1–A4, B1–B4 and carry-in C0
• Outputs: sum Σ1–Σ4 and carry-out C4
• Logic family: 74xx283 (for example 74LS283 or 74HC283; check the marking on the chip)
• Supply voltage: 5 V (4.75 V to 5.25 V) for TTL and LS versions, 2 V to 6 V for HC versions
• Package: 16-pin DIP, through-hole
• Power pins: VCC on pin 16, GND on pin 8

4 Bit Binary Adder 74283 Applications

• Binary addition experiments in digital logic labs
• 8-bit and wider adders by cascading several chips
• Adder and subtractor circuits using two's complement with XOR gates
• Simple ALU and calculator projects
• BCD adders and code converters

What's in the Box

• 1 × 74283 4-bit binary adder IC

Tip: To build an 8-bit adder, connect the C4 carry-out of the first chip to the C0 carry-in of the second, and tie C0 of the first chip to GND. Unlike the 7483, the 74283 has VCC on pin 16 and GND on pin 8, so check which chip your schematic was drawn for.

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