DM74LS283N Equivalent & Substitute Parts

Part Overview

The DM74LS283N is a 4-bit binary full adder with fast carry logic, manufactured by onsemi in a 16-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring this functional capability. The part operates within a 4.75V to 5.25V supply voltage range and supports operating temperatures from 0°C to 70°C.

Substiute Parts

DM74LS283N

onsemiIn Stock: 2248DM74LS283N Datasheet

Current PartRFQ

SN74LS283N

Texas InstrumentsIn Stock: 6732SN74LS283N Datasheet

DirectRFQ

CD74ACT283E

Harris CorporationIn Stock: 5535CD74ACT283E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74LS283N is determined by the following critical parameters:

• Logic Function: Binary full adder with fast carry capability (4-bit)
• Package Type: 16-DIP through-hole configuration with 0.300" (7.62mm) pitch
• Supply Voltage Range: Compatible voltage operation within or overlapping 4.75V ~ 5.25V
• Number of Bits: 4-bit architecture
• Mounting Method: Through-hole technology

Two substitute parts meet these criteria: the SN74LS283N (Texas Instruments, active status) and the CD74ACT283E (Harris Corporation, obsolete status). Both maintain identical package geometry, bit width, and functional equivalence as binary full adders with fast carry.

Parameter Comparison

Engineering Selection Recommendations

SN74LS283N (Texas Instruments) is the primary substitute for the DM74LS283N. Both parts belong to the 74LS logic family with identical electrical specifications and package geometry. The SN74LS283N maintains active product status, ensuring continued availability and supply chain reliability. This part is ROHS3 compliant, meeting modern regulatory requirements.

CD74ACT283E (Harris Corporation) provides functional equivalence as a 4-bit binary full adder with fast carry in the same 16-DIP package. The CD74ACT283E operates across an extended supply voltage range (4.5V ~ 5.5V) and supports a wider operating temperature range (-55°C ~ 125°C). However, this part is classified as obsolete and is not RoHS compliant, limiting its suitability for new designs requiring regulatory compliance.

For applications requiring active product status and regulatory compliance, the SN74LS283N is the recommended substitute. The CD74ACT283E may be considered only when extended temperature range operation is a specific design requirement and supply availability is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS283N directly replace the DM74LS283N?

A: Yes. Both parts are 4-bit binary full adders with fast carry in 16-DIP packages. They share identical supply voltage specifications (4.75V ~ 5.25V) and operating temperature range (0°C ~ 70°C). Pin configuration and functional behavior are equivalent.

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

A: The 74LS series uses low-power Schottky logic, while the 74ACT series uses advanced CMOS technology. The CD74ACT283E supports a wider supply voltage range (4.5V ~ 5.5V) and extended operating temperature (-55°C ~ 125°C) compared to the 74LS variants. Both maintain the same 4-bit adder function and 16-DIP package.

Q: Is the CD74ACT283E suitable for new designs?

A: The CD74ACT283E is classified as obsolete and is not RoHS compliant. For new designs, the SN74LS283N (active status, ROHS3 compliant) is the appropriate choice.

Q: Are all three parts pin-compatible?

A: Yes. The DM74LS283N, SN74LS283N, and CD74ACT283E all use the 16-DIP (0.300", 7.62mm) package with identical pin assignments for the 4-bit binary full adder function.

Q: What certifications apply to these parts?

A: All three parts carry REACH Unaffected and EAR99 ECCN classifications. The SN74LS283N is ROHS3 compliant. The DM74LS283N and CD74ACT283E do not carry RoHS compliance certifications.