DM74LS373N Equivalent & Substitute Parts

Part Overview

The DM74LS373N is a D-Type Transparent Latch IC with 8:8 circuit configuration and tri-state output, manufactured by onsemi in a 20-PDIP package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates within the standard 74LS logic family voltage range of 4.75V to 5.25V and is designed for through-hole mounting applications requiring transparent latch functionality with independent tri-state output control.

Substiute Parts

DM74LS373N

onsemiIn Stock: 1218DM74LS373N Datasheet

Current PartRFQ

SN74LS373N

Texas InstrumentsIn Stock: 13534SN74LS373N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS373N is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch (functional equivalence)
• Circuit Configuration: 8:8 (pin and signal count equivalence)
• Output Type: Tri-State (output control equivalence)
• Voltage Supply Range: 4.75V ~ 5.25V (electrical compatibility)
• Package / Case: 20-DIP (0.300", 7.62mm) (physical and pin compatibility)
• Mounting Type: Through Hole (assembly compatibility)
• Operating Temperature Range: 0°C ~ 70°C (thermal compatibility)

The SN74LS373N manufactured by Texas Instruments meets all substitution criteria and is classified as an active product with current availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS373N is a direct functional equivalent to the DM74LS373N across all critical electrical and mechanical parameters. Selection between these parts is determined by application requirements and regulatory compliance:

For applications requiring RoHS3 compliance, the SN74LS373N is the appropriate selection. The Texas Instruments part carries active product status with established supply chain availability, whereas the onsemi DM74LS373N is obsolete.

The SN74LS373N exhibits superior propagation delay performance at 12ns compared to the DM74LS373N at 18ns. Both parts maintain identical output current specifications and operate within the same voltage and temperature ranges, ensuring functional interchangeability in 74LS logic family circuits.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS373N directly replace the DM74LS373N in existing designs?

A: Yes. Both parts share identical logic type, circuit configuration, output type, voltage supply range, package dimensions, and mounting type. The SN74LS373N is a direct substitute with improved propagation delay performance.

Q: What is the significance of the propagation delay difference between these parts?

A: The SN74LS373N operates at 12ns propagation delay versus 18ns for the DM74LS373N. This represents improved switching speed in the Texas Instruments part. Both values fall within standard 74LS logic family specifications and are compatible with designs specified for either timing parameter.

Q: Are there package compatibility concerns when substituting these parts?

A: No. Both parts use identical 20-DIP (0.300", 7.62mm) packaging with through-hole mounting. Pin count, spacing, and physical dimensions are equivalent, allowing direct PCB compatibility without layout modifications.

Q: What is the impact of RoHS compliance differences?

A: The SN74LS373N is ROHS3 compliant, while the DM74LS373N is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the SN74LS373N is the required selection.

Q: Is the SN74LS373N currently available?

A: Yes. The SN74LS373N carries active product status with 13,452 pieces in stock. The DM74LS373N is obsolete with limited remaining inventory.