DM74AS373N Equivalent & Substitute Parts

Part Overview

The DM74AS373N is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-DIP package suitable for through-hole mounting.

Substiute Parts

DM74AS373N

onsemiIn Stock: 1480DM74AS373N Datasheet

Current PartRFQ

SN74AS373N

Texas InstrumentsIn Stock: 7479SN74AS373N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74AS373N is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Output Current Ratings: 15mA (High), 48mA (Low)
• Operating Temperature Range: 0°C ~ 70°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

The SN74AS373N from Texas Instruments meets all these criteria and qualifies as a direct functional equivalent. Both parts share the same base product number (74AS373) and identical electrical specifications for supply voltage, output current, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS373N from Texas Instruments is the appropriate substitute for the obsolete DM74AS373N. Both components are classified under ECCN EAR99 and maintain REACH Unaffected status, ensuring regulatory compliance across supply chains.

The primary distinction between the two parts is product status: the DM74AS373N is obsolete, while the SN74AS373N remains active in production. The SN74AS373N additionally carries RoHS3 Compliance certification, providing enhanced environmental compliance for new designs and applications requiring modern regulatory adherence.

Propagation delay specifications differ between the two parts (4.6ns for DM74AS373N versus 6ns for SN74AS373N); however, both values remain within acceptable performance parameters for standard 74AS logic applications. The Texas Instruments variant is suitable for direct replacement in existing circuit designs without modification to PCB layout or electrical connections.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS373N directly replace the DM74AS373N without PCB modifications?

A: Yes. Both parts share identical package dimensions (20-DIP, 0.300" spacing), mounting type (through-hole), and electrical specifications for supply voltage, output current, and operating temperature. Pin-to-pin compatibility is complete.

Q: What is the significance of the propagation delay difference (4.6ns vs. 6ns)?

A: Both propagation delay values are within the performance envelope of 74AS logic series components. The difference does not affect functional compatibility in standard applications. System timing analysis should confirm acceptability for specific circuit requirements.

Q: Why is the DM74AS373N listed as obsolete?

A: Obsolescence indicates the part is no longer manufactured by onsemi. The SN74AS373N from Texas Instruments remains in active production and serves as the recommended long-term supply source.

Q: Are there compliance differences between the two parts?

A: Both parts maintain REACH Unaffected and EAR99 ECCN classifications. The SN74AS373N carries additional RoHS3 Compliance certification, making it preferable for applications requiring modern environmental compliance standards.

Q: What packaging options are available for the SN74AS373N?

A: The SN74AS373N is supplied in tube packaging. The DM74AS373N packaging specification was not provided in the original documentation.