SN75LBC172DW Equivalent & Substitute Parts

Part Overview

The SN75LBC172DW 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. Finding equivalent substitute parts is necessary to ensure design continuity and long-term supply chain reliability for applications requiring RS422/RS485 driver functionality.

Substiute Parts

SN75LBC172DW

Texas InstrumentsIn Stock: 2789SN75LBC172DW Datasheet

Current PartRFQ

SN75LBC172DWR

Texas InstrumentsIn Stock: 2218SN75LBC172DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75LBC172DW is determined by strict equivalence across the following critical parameters:

• Protocol support: RS422 and RS485 compatibility
• Driver/Receiver configuration: 4/0 (4 drivers, 0 receivers)
• Package type: 20-SOIC form factor with identical physical dimensions
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Compliance certifications: ROHS3, REACH Unaffected status

The substitute part SN75LBC172DWR maintains identical electrical and mechanical specifications. The only distinction is packaging format: the original uses Tube packaging while the substitute uses Tape & Reel (TR) format. Both are manufactured by Texas Instruments under the same base product number 75LBC172.

Parameter Comparison

Engineering Selection Recommendations

The SN75LBC172DWR is a direct functional equivalent to the SN75LBC172DW. Both parts share identical electrical specifications, pin configuration, and mechanical dimensions. The primary distinction is product status and packaging format.

Selection criteria:

• For new designs or long-term production: SN75LBC172DWR is recommended due to Active product status, ensuring continued availability and supply chain stability.
• For existing inventory management: SN75LBC172DW remains viable while Last Time Buy stock is available, provided application requirements do not mandate extended component lifecycle.
• Packaging consideration: Tape & Reel format (SN75LBC172DWR) is standard for automated assembly processes, while Tube format (SN75LBC172DW) is suitable for manual handling or lower-volume applications.

Both parts maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can SN75LBC172DWR be used as a direct replacement for SN75LBC172DW?

A: Yes. Both parts are electrically and mechanically identical. They share the same pin configuration, supply voltage range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and 20-SOIC package dimensions. The only difference is packaging format (Tube vs. Tape & Reel).

Q: What does Last Time Buy status mean for the SN75LBC172DW?

A: Last Time Buy indicates the manufacturer has discontinued production. Existing inventory is available but will not be replenished. Once depleted, the part becomes unavailable. The SN75LBC172DWR (Active status) should be considered for future designs.

Q: Are there any compatibility issues when switching from Tube to Tape & Reel packaging?

A: No compatibility issues exist at the component level. Both packaging formats contain identical parts. The difference affects handling and assembly processes. Tape & Reel format is optimized for automated pick-and-place assembly, while Tube format is suitable for manual or semi-automated processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN75LBC172DW and SN75LBC172DWR are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory requirements for industrial applications.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices are sufficient; no special dry-pack requirements apply.