DM74LS374WM Equivalent & Substitute Parts

Part Overview

The DM74LS374WM is a Logic category integrated circuit flip-flop, specifically a D-Type single element 8-bit positive edge-triggered device in a 20-SOIC surface mount package. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The 74LS series architecture and electrical characteristics define the substitution scope for this device.

Substiute Parts

DM74LS374WM

onsemiIn Stock: 1178DM74LS374WM Datasheet

Current PartRFQ

SN74LS374DW

Texas InstrumentsIn Stock: 2207SN74LS374DW Datasheet

DirectRFQ

SN74LS374DWR

Texas InstrumentsIn Stock: 2071SN74LS374DWR Datasheet

DirectRFQ

CY74FCT374ATSOCT

Texas InstrumentsIn Stock: 2968CY74FCT374ATSOCT Datasheet

SimilarRFQ

SN74LS374NSR

Texas InstrumentsIn Stock: 3781SN74LS374NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS374WM is determined by strict alignment with the following core parameters:

• Logic Function: D-Type flip-flop, 1 element, 8-bit configuration
• Output Architecture: Tri-State, Non-Inverted
• Trigger Mechanism: Positive Edge
• Package Footprint: 20-SOIC surface mount
• Voltage Supply Range: 4.75V ~ 5.25V
• Logic Family Compatibility: 74LS series or pin-compatible alternatives

Substitute parts are categorized into two groups:

Direct Substitutes (Pin and Function Compatible): SN74LS374DW and SN74LS374DWR maintain identical 74LS series architecture, pinout, and electrical characteristics. These parts are interchangeable at the circuit board level.

Similar Substitutes (Enhanced Performance, Same Package): CY74FCT374ATSOCT and SN74LS374NSR provide equivalent logic function and package compatibility but with variations in performance specifications or package dimensions. CY74FCT374ATSOCT operates at higher clock frequencies (250 MHz vs. 20 MHz) and extended temperature range. SN74LS374NSR uses a narrower 20-SO package (0.209" vs. 0.295" width) while maintaining 74LS electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition): SN74LS374DWR is the primary recommendation. This part maintains full 74LS series compatibility, identical pinout, and equivalent electrical performance. Product status is Active, ensuring long-term availability and supply chain stability. RoHS3 compliance supports modern manufacturing and environmental standards.

For Existing Inventory Utilization: SN74LS374DW remains functionally compatible despite Discontinued at DiGi Electronics status. Existing stock of 2100 units provides near-term supply. This part is suitable for applications where immediate component availability is prioritized over long-term supply assurance.

For Enhanced Performance Applications: CY74FCT374ATSOCT provides superior clock frequency (250 MHz vs. 20 MHz) and extended operating temperature range (-40°C to 85°C). This part is appropriate for applications requiring higher speed operation or wider temperature margins. Pin compatibility with the 20-SOIC package is maintained.

For Space-Constrained Designs: SN74LS374NSR offers the same 74LS electrical characteristics in a narrower 20-SO package (0.209" width vs. 0.295"). This part is suitable for PCB layouts where reduced component footprint is required, provided the narrower package dimension is accommodated in the design.

Frequently Asked Questions (FAQ)

Q: Can SN74LS374DWR be used as a direct replacement for DM74LS374WM?

A: Yes. Both parts are 8-bit D-Type flip-flops with identical pinout, tri-state non-inverted output, positive edge trigger, and 20-SOIC package. Electrical specifications including supply voltage (4.75V–5.25V) and operating temperature (0°C–70°C) are equivalent. SN74LS374DWR is Active status, making it the recommended replacement for the Obsolete DM74LS374WM.

Q: What is the difference between SN74LS374DW and SN74LS374DWR?

A: Both parts are functionally identical 74LS flip-flops with the same electrical characteristics and pinout. The primary difference is packaging: SN74LS374DW is supplied in Tube packaging, while SN74LS374DWR is supplied in Tape & Reel (TR) format. SN74LS374DWR has Active product status; SN74LS374DW is Discontinued at DiGi Electronics. For new designs, SN74LS374DWR is preferred.

Q: Can CY74FCT374ATSOCT replace DM74LS374WM in all applications?

A: CY74FCT374ATSOCT maintains pin and package compatibility with the 20-SOIC footprint and provides equivalent logic function. However, it operates at significantly higher clock frequency (250 MHz vs. 20 MHz) and supports extended temperature range (-40°C to 85°C vs. 0°C to 70°C). Output current specifications differ (32mA/64mA vs. 2.6mA/24mA). Substitution is valid for applications where the original 20 MHz specification is not a limiting constraint and higher performance is acceptable.

Q: Is SN74LS374NSR compatible with the original DM74LS374WM PCB layout?

A: SN74LS374NSR maintains identical pinout and 20-SOIC package family but uses a narrower package width (0.209" vs. 0.295"). The part is electrically compatible with 74LS specifications. PCB footprint compatibility depends on whether the design accommodates the narrower package dimension. Physical board layout verification is required before substitution.

Q: What are the RoHS compliance implications of substituting DM74LS374WM?

A: DM74LS374WM is RoHS non-compliant. All recommended substitutes (SN74LS374DW, SN74LS374DWR, CY74FCT374ATSOCT, SN74LS374NSR) are ROHS3 Compliant. Substitution aligns designs with current environmental and regulatory standards.

Q: Are there inventory considerations for selecting a substitute?

A: SN74LS374DWR (Active status, 2046 units in stock) provides the most stable long-term supply. SN74LS374NSR (Active status, 3700 units) offers the highest current inventory. SN74LS374DW (Discontinued, 2100 units) is suitable for near-term needs only. CY74FCT374ATSOCT (Active status, 2873 units) is available but represents a different logic family with enhanced performance.