SN74LS374DWG4 Equivalent & Substitute Parts

Part Overview

The SN74LS374DWG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement continuity. The part operates at 50 MHz clock frequency with tri-state, non-inverted output configuration in a 20-SOIC surface mount package.

Substiute Parts

SN74LS374DWG4

Texas InstrumentsIn Stock: 1053SN74LS374DWG4 Datasheet

Current PartRFQ

SN74LS374DBR

Texas InstrumentsIn Stock: 3840SN74LS374DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS374DWG4 is determined by strict equivalence across the following critical parameters:

• Base product number (74LS374) ensures identical logic function and pin configuration
• D-Type flip-flop architecture with 1 element and 8-bit capacity
• Positive edge trigger mechanism
• Tri-state, non-inverted output configuration
• Clock frequency of 50 MHz
• Propagation delay of 28 ns @ 5V, 45pF
• Supply voltage range 4.75V ~ 5.25V
• Output current specifications: 2.6 mA (high), 24 mA (low)
• Quiescent current of 40 mA
• Operating temperature range 0°C ~ 70°C
• Surface mount technology with ROHS3 compliance

The primary distinction between the main part and its substitute lies in the package format: the SN74LS374DWG4 uses 20-SOIC (0.295", 7.50mm width), while the substitute uses 20-SSOP (0.209", 5.30mm width). Both packages are surface mount configurations with identical pin counts and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS374DBR serves as the active equivalent for the obsolete SN74LS374DWG4. Both parts maintain identical electrical specifications, logic function, and pin configuration. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

Selection between these parts depends on PCB layout constraints:

• The SN74LS374DWG4 (20-SOIC, 0.295" width) accommodates designs with standard pitch requirements and established layout patterns.
• The SN74LS374DBR (20-SSOP, 0.209" width) provides a more compact footprint suitable for space-constrained applications while maintaining identical electrical performance.

Both parts comply with ROHS3 standards and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. The substitute part's Tape & Reel packaging format supports automated assembly processes, whereas the main part's tube packaging is suited for manual or lower-volume assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS374DBR directly replace the SN74LS374DWG4 in existing designs?

A: Electrical substitution is direct due to identical logic function, pin count, and electrical specifications. PCB layout modification is required due to package format differences (20-SOIC versus 20-SSOP). Footprint redesign and revalidation are necessary before implementation.

Q: What are the key differences between 20-SOIC and 20-SSOP packages?

A: The 20-SOIC package measures 0.295" (7.50mm) in width, while the 20-SSOP package measures 0.209" (5.30mm) in width. Both are surface mount configurations with identical pin spacing and electrical characteristics. The SSOP format provides approximately 29% width reduction, enabling higher component density on PCBs.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL Level 1 moisture sensitivity ratings. No compliance-related restrictions apply to substitution.

Q: Why is the main part listed as obsolete?

A: The SN74LS374DWG4 has reached end-of-life status in Texas Instruments' product portfolio. The SN74LS374DBR remains in active production, providing continued design support and component availability for the 74LS374 logic function.

Q: What packaging format should be selected for new designs?

A: For new designs, the SN74LS374DBR (20-SSOP, Tape & Reel) is the recommended selection due to active product status, compact footprint, and automated assembly compatibility. Existing designs using the SN74LS374DWG4 may continue with current inventory until depletion, after which migration to the substitute part is necessary.