DM74LS83AN Equivalent & Substitute Parts

Part Overview

The DM74LS83AN is a 4-bit binary full adder IC manufactured by onsemi, housed in a 16-DIP package. This component performs parallel binary addition with carry propagation and operates within the 4.75V to 5.25V supply voltage range. The part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. Substitute parts must maintain functional equivalence in bit width, logic operation, package form factor, and electrical operating parameters.

Substiute Parts

DM74LS83AN

onsemiIn Stock: 1107DM74LS83AN Datasheet

Current PartRFQ

SN74LS283N

Texas InstrumentsIn Stock: 6732SN74LS283N Datasheet

DirectRFQ

CD74ACT283E

Harris CorporationIn Stock: 5535CD74ACT283E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Logic Function: All substitutes must perform 4-bit binary full addition with carry propagation
• Package Form Factor: All substitutes must use 16-DIP (0.300", 7.62mm) through-hole packaging
• Supply Voltage Compatibility: Operating voltage ranges must overlap or encompass the 4.75V ~ 5.25V requirement
• Bit Width: All substitutes must process 4-bit operands
• Pin Configuration: Electrical and mechanical pin assignments must be compatible with the 16-PDIP footprint

The DM74LS83AN has two identified substitutes: SN74LS283N (direct substitute with enhanced carry logic) and CD74ACT283E (logic family variant with extended temperature range).

Parameter Comparison

Engineering Selection Recommendations

SN74LS283N is the primary substitute for new designs. It maintains identical supply voltage and operating temperature specifications as the DM74LS83AN while offering active product status and ROHS3 compliance. The enhanced fast carry logic provides improved propagation characteristics within the same package footprint and pin configuration.

CD74ACT283E serves as an alternative where extended temperature range operation (-55°C to 125°C) is required. This part operates across a wider supply voltage window (4.5V ~ 5.5V) and maintains the same 4-bit binary full adder function. However, its obsolete status limits suitability for long-term production applications.

For applications requiring RoHS compliance and active product support, SN74LS283N is the recommended selection. For legacy system maintenance where the original DM74LS83AN must be replaced, both SN74LS283N and CD74ACT283E provide functional equivalence within their respective operational constraints.

Frequently Asked Questions (FAQ)

Q: Can SN74LS283N directly replace DM74LS83AN in existing circuits?

A: Yes. Both parts operate at identical supply voltages (4.75V ~ 5.25V), identical temperature ranges (0°C ~ 70°C), and use the same 16-DIP package with compatible pin assignments. The fast carry enhancement in SN74LS283N improves performance without affecting functional compatibility.

Q: What is the difference between the 74LS and 74ACT logic families?

A: The 74LS series uses TTL logic technology, while 74ACT uses CMOS technology. Both perform the same 4-bit binary addition function. The CD74ACT283E operates across a wider temperature range (-55°C to 125°C) and supply voltage window (4.5V ~ 5.5V) compared to the 74LS variants.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 16-DIP (0.300", 7.62mm) package with identical pin assignments for 4-bit binary full adder operation. Direct socket substitution is possible without circuit modification.

Q: Which substitute should be used for new product designs?

A: SN74LS283N is the recommended choice for new designs. It is the only active product among the substitutes and meets ROHS3 compliance requirements. It maintains the same electrical specifications as the original DM74LS83AN while offering improved carry propagation characteristics.

Q: Can CD74ACT283E be used in applications requiring 0°C ~ 70°C operation?

A: Yes. The CD74ACT283E operating range of -55°C to 125°C encompasses the 0°C ~ 70°C specification. However, its obsolete status makes it unsuitable for new production applications where long-term availability is required.