DM74ALS373N Equivalent & Substitute Parts

Part Overview

The DM74ALS373N is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output in a 20-DIP package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. The 74ALS series logic family provides standard digital latch functionality suitable for data storage and multiplexing applications in legacy and modern systems.

Substiute Parts

DM74ALS373N

onsemiIn Stock: 1454DM74ALS373N Datasheet

Current PartRFQ

SN74ALS373AN

Texas InstrumentsIn Stock: 1311SN74ALS373AN Datasheet

DirectRFQ

SN74ALS573CN

Texas InstrumentsIn Stock: 2299SN74ALS573CN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS373N is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Allowable Variation Parameters:

• Propagation Delay Time: Within acceptable timing margins for the application
• Product Status: Active status preferred for long-term availability
• Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align

The substitute parts identified below meet all mandatory matching criteria and represent direct functional equivalents suitable for replacement in existing designs or new implementations.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS373AN (Texas Instruments) is a direct manufacturer equivalent with active product status. This part maintains identical electrical specifications and package configuration to the DM74ALS373N. The propagation delay time of 6ns represents a minor increase from the original 2ns specification but remains within acceptable operational margins for standard latch applications. This part carries ROHS3 compliance certification, supporting modern environmental and regulatory requirements.

SN74ALS573CN (Texas Instruments) is a parametric equivalent offering identical propagation delay time (2ns) and all critical electrical parameters. This part also maintains active product status and ROHS3 compliance. The base product number differs (74ALS573 versus 74ALS373), indicating a different internal circuit topology, though functional equivalence is maintained across all specified parameters.

Both substitute parts are manufactured by Texas Instruments, a primary supplier in the 74ALS logic family, ensuring long-term availability and consistent quality standards. Selection between the two substitutes should be based on specific timing requirements and circuit topology compatibility within the target application.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS373AN replace DM74ALS373N directly? A: Yes. The SN74ALS373AN is a direct equivalent meeting all mandatory electrical and mechanical parameters. The propagation delay difference (6ns versus 2ns) is acceptable for standard latch applications where timing margins are not critical.

Q: What is the difference between SN74ALS373AN and SN74ALS573CN? A: Both parts are functionally equivalent as D-Type Transparent Latches with 8:8 configuration and tri-state output. The primary difference is propagation delay time: SN74ALS373AN operates at 6ns while SN74ALS573CN operates at 2ns, matching the original DM74ALS373N specification. The base product numbers (373 versus 573) reflect different internal circuit designs but equivalent external functionality.

Q: Are these parts pin-compatible? A: Yes. All three parts use the 20-DIP package with identical pin configuration, enabling direct socket replacement without PCB modifications.

Q: Do the substitute parts meet modern compliance standards? A: Both Texas Instruments substitutes carry ROHS3 compliance and REACH Unaffected status, supporting current environmental and regulatory requirements. The original onsemi part does not specify RoHS compliance due to its obsolete status.

Q: Which substitute should I select for new designs? A: For new designs, either substitute is acceptable. SN74ALS573CN is preferred if the original 2ns propagation delay specification is critical. SN74ALS373AN is suitable for applications with relaxed timing requirements and may offer better availability.

Q: Can I use these parts in legacy systems? A: Yes. Both substitutes are backward compatible with systems designed for the DM74ALS373N, provided the operating voltage (4.5V ~ 5.5V) and temperature range (0°C ~ 70°C) match the original system specifications.