SN75172DW Equivalent & Substitute Parts

Part Overview

The SN75172DW is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory of 79,356 pieces. The SN75172DW serves as a critical interface driver for RS422 and RS485 serial communication protocols in industrial and embedded systems. Due to its Last Time Buy status, identifying equivalent substitute parts is essential for long-term design continuity and supply chain planning.

Substiute Parts

SN75172DW

Texas InstrumentsIn Stock: 79420SN75172DW Datasheet

Current PartRFQ

SN75172DWR

Texas InstrumentsIn Stock: 2277SN75172DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN75172DW is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: RS422/RS485 interface driver functionality
• Driver/Receiver Configuration: 4/0 driver-only architecture
• Electrical Specifications: 4.75V to 5.25V supply voltage range and 0°C to 70°C operating temperature
• Package Compatibility: 20-SOIC surface mount package with identical 0.295" (7.50mm) width
• Regulatory Compliance: ROHS3 compliance, MSL Level 1, and REACH unaffected status

The SN75172DWR qualifies as a direct substitute based on identical electrical, mechanical, and regulatory parameters. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The SN75172DWR is the direct substitute for the SN75172DW. Both parts share identical electrical specifications, package geometry, and regulatory compliance certifications. The SN75172DWR maintains Active product status, ensuring continued availability and long-term supply chain viability compared to the Last Time Buy status of the SN75172DW.

Selection between these parts should be based on:

• Supply Continuity: The SN75172DWR is recommended for new designs and long-term production due to Active status
• Packaging Requirements: The SN75172DW is supplied in Tube packaging, while the SN75172DWR is available in Cut Tape and Digi-Reel® formats
• Inventory Planning: The SN75172DW has significantly higher current inventory (79,356 pieces) suitable for immediate procurement needs

Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating, meeting modern environmental and reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the SN75172DWR directly replace the SN75172DW in existing designs?

A: Yes. The SN75172DWR is electrically and mechanically identical to the SN75172DW. Both parts feature the same 20-SOIC package, 4.75V to 5.25V supply voltage range, 0°C to 70°C operating temperature, and RS422/RS485 protocol support. No circuit modifications are required.

Q: What is the difference between the SN75172DW and SN75172DWR?

A: The primary differences are product status and packaging format. The SN75172DW is Last Time Buy with Tube packaging, while the SN75172DWR is Active with Cut Tape and Digi-Reel® packaging options. All electrical and mechanical specifications are identical.

Q: Why is the SN75172DW classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory remains available, but no new production runs are planned. The SN75172DWR serves as the active replacement.

Q: Are there any compliance differences between these parts?

A: No. Both the SN75172DW and SN75172DWR are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. Regulatory and environmental compliance is identical.

Q: Which part should I specify for new production designs?

A: The SN75172DWR is recommended for new designs due to its Active product status and assured long-term availability. The SN75172DW may be considered only for immediate short-term requirements where existing inventory is sufficient.

Q: Is the 20-SOIC package footprint identical between both parts?

A: Yes. Both parts use the 20-SOIC package with 0.295" (7.50mm) width. PCB footprints and land patterns are identical, allowing direct substitution without layout modifications.