DM74145N Equivalent & Substitute Parts

Part Overview

The DM74145N is a 1 x 4:10 decoder logic integrated circuit manufactured by onsemi in 16-DIP packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The decoder function remains consistent across qualified substitutes, with variations in electrical performance characteristics and product status.

Substiute Parts

DM74145N

onsemiIn Stock: 3142DM74145N Datasheet

Current PartRFQ

SN7445N

Texas InstrumentsIn Stock: 4989SN7445N Datasheet

DirectRFQ

SN74LS145N

Texas InstrumentsIn Stock: 2100SN74LS145N Datasheet

SimilarRFQ

SN74145N

Texas InstrumentsIn Stock: 2205SN74145N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74145N is determined by the following critical parameters: decoder circuit configuration (1 x 4:10), package type (16-DIP), voltage supply range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and mounting method (Through Hole). All qualified substitutes maintain these core specifications.

Substitutes are categorized as follows:

Direct Manufacturer Equivalent: SN7445N maintains identical electrical performance and circuit configuration with active product status and RoHS3 compliance.

Similar Configuration: SN74LS145N operates within the same voltage and temperature parameters but represents a different logic family (74LS series) with active availability.

Parametric Equivalent: SN74145N provides matching electrical characteristics and circuit function with active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

SN7445N (Direct Equivalent): This Texas Instruments part provides active product status with ROHS3 compliance. It maintains identical circuit configuration and electrical specifications with current manufacturing availability.

SN74145N (Parametric Equivalent): This Texas Instruments part offers active product status and ROHS3 compliance. It matches the DM74145N electrical characteristics and 7400 series classification with ongoing supply.

SN74LS145N (Similar Configuration): This part operates within the same voltage and temperature parameters as a 74LS series variant. It provides active status and ROHS3 compliance but represents a different logic family.

Selection should prioritize parts with active product status and current RoHS compliance for new designs and long-term procurement stability.

Frequently Asked Questions (FAQ)

Q: Can SN7445N directly replace DM74145N in existing designs? A: Yes. SN7445N maintains identical circuit configuration (1 x 4:10), package type (16-DIP), voltage supply range (4.75V ~ 5.25V), and operating temperature range (0°C ~ 70°C). Pin-for-pin compatibility is maintained.

Q: What is the difference between SN74145N and SN7445N? A: Both are Texas Instruments 7400 series decoders with identical electrical specifications. SN7445N is classified as a direct manufacturer equivalent, while SN74145N is a parametric equivalent. Both support the same circuit function and package.

Q: Is SN74LS145N compatible with DM74145N applications? A: SN74LS145N maintains the same voltage supply (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), package (16-DIP), and circuit configuration (1 x 4:10). It represents the 74LS logic family variant with identical functional performance.

Q: Why is DM74145N listed as obsolete? A: The DM74145N is no longer in active production by onsemi. Active substitutes from Texas Instruments provide equivalent functionality with current manufacturing support.

Q: Are all substitutes RoHS compliant? A: SN7445N, SN74LS145N, and SN74145N are all ROHS3 compliant. The original DM74145N is RoHS non-compliant.

Q: Can these parts be used interchangeably in through-hole PCB designs? A: Yes. All listed substitutes use 16-DIP through-hole packaging with identical pin spacing (0.300", 7.62mm), supporting direct board-level substitution.