74244 - Binary Full Adder

The 74244 is a 4-bit binary full adder integrated circuit (IC) from the 7400-series TTL logic family. It combines two 4-bit binary numbers with a carry-in input and produces a 4-bit sum and a carry-out. Widely used in digital arithmetic operations, it offers reliable high-speed performance, making it suitable for use in microprocessor and arithmetic logic unit (ALU) designs during early digital computing eras.

Fig.: M74HC244BI (High-speed CMOS) Binary Full Adder in PDIP-20 package

Fig.: SN74HCT244N (High-speed CMOS, TTL compatible) Binary Full Adder in PDIP-20 package

Features/Specifications

Number of Channels	8
Supply Voltage	2V to 6V
Max Output Current per Pin	±35 mA
Propagation Delay	~7 ns
Operating Temperature	-40°C to +85°C

📄 SN74HCT244 datasheet (2153 kB)

Connections

Pin Number	Name	Description
1	1OE	Output Enable for Buffer Group 1 (active low)
2	1A0	Input A0 for Buffer Group 1
3	2Y0	Output Y0 for Buffer Group 2
4	1A1	Input A1 for Buffer Group 1
5	2Y1	Output Y1 for Buffer Group 2
6	1A2	Input A2 for Buffer Group 1
7	2Y2	Output Y2 for Buffer Group 2
8	1A3	Input A3 for Buffer Group 1
9	2Y3	Output Y3 for Buffer Group 2
10	GND	Ground
11	2A3	Input A3 for Buffer Group 2
12	1Y3	Output Y3 for Buffer Group 1
13	2A2	Input A2 for Buffer Group 2
14	1Y2	Output Y2 for Buffer Group 1
15	2A1	Input A1 for Buffer Group 2
16	1Y1	Output Y1 for Buffer Group 1
17	2A0	Input A0 for Buffer Group 2
18	1Y0	Output Y0 for Buffer Group 1
19	2OE	Output Enable for Buffer Group 2 (active low)
20	VCC	Supply Voltage

Last edited by Christian Grieger on 2025-05-10

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