SN74LS245DWRG4 Equivalent & Substitute Parts

Part Overview

The SN74LS245DWRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates within a 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts maintain identical functional specifications while offering improved availability and active product status.

Substiute Parts

SN74LS245DWRG4

Texas InstrumentsIn Stock: 726SN74LS245DWRG4 Datasheet

Current PartRFQ

SN74LS245DBR

Texas InstrumentsIn Stock: 4884SN74LS245DBR Datasheet

MFR RecommendedRFQ

SN74LS245DWR

Texas InstrumentsIn Stock: 2510SN74LS245DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LS245DWRG4 is determined by strict equivalence across the following critical parameters: logic type (non-inverting transceiver), functional configuration (1 element, 8 bits per element), output architecture (3-state), electrical performance (15mA/24mA output current, 4.75V–5.25V supply), operating temperature range (0°C–70°C), and compliance certifications (ROHS3, REACH Unaffected). Package type and product status are secondary considerations that define substitution categories.

Two substitute parts are identified:

MFR Recommended Substitute (SN74LS245DBR): Maintains all electrical and functional parameters with a package change from 20-SOIC to 20-SSOP. This substitute is actively manufactured and recommended for new designs requiring the same electrical performance in a smaller footprint.

Parametric Equivalent (SN74LS245DWR): Maintains identical package type (20-SOIC) and all electrical specifications. This substitute is actively manufactured and represents a direct form-fit-function replacement.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package): Select SN74LS245DWR when PCB layout and component footprint constraints require the 20-SOIC package. This part is actively manufactured and provides identical electrical performance and package specifications to the obsolete SN74LS245DWRG4.

For New Designs or Space-Constrained Applications: Select SN74LS245DBR when design flexibility permits package migration. The 20-SSOP package offers a smaller footprint (5.30mm vs. 7.50mm width) while maintaining all electrical parameters. This part is actively manufactured and recommended by the manufacturer.

Both substitute parts carry ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original part. Product status transition from obsolete to active improves long-term supply chain reliability and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can SN74LS245DBR be used as a direct replacement for SN74LS245DWRG4?

A: SN74LS245DBR is electrically equivalent but uses a different package (20-SSOP vs. 20-SOIC). PCB layout modification is required. If the original PCB footprint cannot be changed, use SN74LS245DWR instead.

Q: What is the primary difference between the two substitute parts?

A: SN74LS245DWR maintains the original 20-SOIC package for direct PCB compatibility. SN74LS245DBR uses a 20-SSOP package with reduced footprint dimensions. Both are electrically identical.

Q: Are the substitute parts compatible with existing designs using SN74LS245DWRG4?

A: SN74LS245DWR is fully compatible without design changes. SN74LS245DBR requires PCB redesign due to package differences but offers identical electrical performance.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both SN74LS245DBR and SN74LS245DWR are ROHS3 compliant and REACH Unaffected, matching the compliance profile of the original part.

Q: Why is the original SN74LS245DWRG4 marked as obsolete?

A: Product obsolescence reflects manufacturing discontinuation. Active substitute parts (SN74LS245DWR and SN74LS245DBR) provide continued access to equivalent functionality with improved supply availability.