SN75ALS172ADW Equivalent & Substitute Parts

Part Overview

The SN75ALS172ADW is a 4/0 Driver IC for RS422 and RS485 serial communication interfaces, manufactured by Texas Instruments in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identifying equivalent substitute parts is essential for ongoing system design, maintenance, and procurement planning when original stock becomes unavailable.

Substiute Parts

SN75ALS172ADW

Texas InstrumentsIn Stock: 3000318SN75ALS172ADW Datasheet

Current PartRFQ

SN75ALS172ADWR

Texas InstrumentsIn Stock: 3968SN75ALS172ADWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75ALS172ADW is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS422 and RS485 serial communication standards
• Driver/Receiver Configuration: Identical 4/0 driver/receiver count ensures functional compatibility
• Electrical Specifications: Matching supply voltage range (4.75V ~ 5.25V) and operating temperature range (0°C ~ 70°C)
• Package Specification: Identical 20-SOIC surface mount package with matching physical dimensions (0.295", 7.50mm Width)
• Regulatory Compliance: ROHS3 compliance, MSL Level 1, and REACH Unaffected status maintained across all substitutes

The SN75ALS172ADWR qualifies as a direct substitute based on complete alignment with all specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN75ALS172ADWR is the qualified substitute for the SN75ALS172ADW. Both parts share identical electrical and mechanical specifications, including supply voltage, operating temperature range, package configuration, and regulatory compliance status. The primary distinction is product lifecycle status: the SN75ALS172ADW is Last Time Buy with limited inventory (3,000,300 pcs), while the SN75ALS172ADWR maintains Active status with current availability (3,920 pcs). For new designs and ongoing procurement, the SN75ALS172ADWR is the appropriate selection to ensure long-term supply continuity and compliance with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the SN75ALS172ADWR be used as a direct replacement for the SN75ALS172ADW in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including supply voltage, operating temperature, driver/receiver configuration, RS422/RS485 protocol support, and 20-SOIC package dimensions. No circuit modifications are required.

Q: What is the difference between SN75ALS172ADW and SN75ALS172ADWR?

A: The parts are functionally equivalent. The primary difference is product status: SN75ALS172ADW is Last Time Buy (discontinued), while SN75ALS172ADWR is Active (current production). Both maintain identical ROHS3 compliance, MSL Level 1 rating, and REACH Unaffected status.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical 20-SOIC surface mount package with 0.295" width and 7.50mm dimensions. Pinout and package footprint are identical, ensuring direct PCB compatibility.

Q: What supply voltage range do these parts support?

A: Both the SN75ALS172ADW and SN75ALS172ADWR operate within the 4.75V to 5.25V supply voltage range, suitable for standard 5V logic systems.

Q: What is the operating temperature range for these interface drivers?

A: Both parts are rated for 0°C to 70°C operating temperature, appropriate for commercial and industrial applications within this thermal envelope.

Q: Are these parts RoHS compliant?

A: Yes. Both the SN75ALS172ADW and SN75ALS172ADWR are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity level) and REACH Unaffected status.