XD74LS283 – 4-Bit Binary Full Adder Logic IC – Xinluda

The Xinluda XD74LS283 is a 4-bit binary full adder with internal carry look-ahead from the 74LS TTL logic family, supplied in a 16-pin DIP package. Available on an RFQ basis from Pacific Component Xchange.

The XD74LS283 from Xinluda is a high-speed 4-bit binary full adder belonging to the well-established 74LS (Low-power Schottky TTL) logic family. It performs the addition of two 4-bit binary words, providing a sum output for each bit and a resultant carry (C4) taken from the fourth bit. With full internal carry look-ahead across all four bits, the device generates the carry term quickly, offering look-ahead performance at the economy and reduced package count of a ripple-carry implementation. The adder logic, including the carry, is implemented in true form, so end-around carry can be accomplished without the need for additional logic or level inversion.

The XD74LS283 is a pin-compatible equivalent to the industry-standard 74LS283 / SN74LS283, making it a practical drop-in option for legacy designs, education, repair, and production runs that still rely on classic TTL arithmetic logic.

Key Features

• 4-bit binary full adder with internal carry look-ahead
• Adds two 4-bit binary words with carry input (C0) and carry output (C4)
• Full carry look-ahead across all four bits
• 74LS Low-power Schottky TTL logic family
• Recommended supply voltage (Vcc): 4.75 V to 5.25 V (5 V nominal)
• Operating (free-air) temperature range: 0°C to 70°C (commercial grade)
• 16-pin DIP (DIP-16) through-hole package
• Pin-for-pin compatible with the standard 74LS283 / SN74LS283

Applications

• Arithmetic logic units (ALUs) and adder/subtractor circuits
• Address and offset computation in digital systems
• Counters, accumulators, and binary arithmetic blocks
• Legacy TTL board repair and lifetime-buy production
• Education, prototyping, and digital-logic lab work

Why Source XD74LS283 from Pacific Component Xchange

The XD74LS283 is a hard-to-find part with limited authorized-distributor stock. Pacific Component Xchange specializes in sourcing scarce, obsolete, and hard-to-find logic and power-management ICs like the XD74LS283. As an independent distributor, we leverage a global supplier network to locate genuine inventory, with a focus on authenticity and traceability. We support obsolete and end-of-life sourcing, lifetime buys, and shortage mitigation, and we ship worldwide. Request a quote (RFQ) for the XD74LS283 today and our team will respond with availability, lead time, and pricing.