SN65LBC171DBRG4 Equivalent & Substitute Parts

Part Overview

The SN65LBC171DBRG4 is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments, featuring 3 drivers and 3 receivers in a 20-SSOP surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across industrial temperature ranges and complies with ROHS3 and REACH standards, making it suitable for legacy system maintenance and component replacement scenarios.

Substiute Parts

SN65LBC171DBRG4

Texas InstrumentsIn Stock: 1132SN65LBC171DBRG4 Datasheet

Current PartRFQ

SN65LBC171DB

Texas InstrumentsIn Stock: 1097SN65LBC171DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN65LBC171DBRG4 is determined by strict equivalence across the following critical parameters:

• Protocol compatibility: RS422/RS485 half-duplex operation
• Driver/receiver configuration: 3 drivers and 3 receivers
• Electrical specifications: 30 Mbps data rate, 4.75V–5.25V supply voltage, 40 mV receiver hysteresis
• Package specification: 20-SSOP surface mount form factor
• Operating temperature range: -40°C to 85°C
• Compliance certifications: ROHS3 and REACH standards

The substitute part SN65LBC171DB meets all these criteria and is manufactured by the same supplier (Texas Instruments), ensuring functional and electrical equivalence. The primary distinction is product status: SN65LBC171DB is active, whereas the original part is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The SN65LBC171DB is the direct substitute for the obsolete SN65LBC171DBRG4. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The substitute part maintains active product status, ensuring continued availability and manufacturing support. Both parts comply with ROHS3 and REACH standards, meeting regulatory requirements for industrial and commercial applications. The SN65LBC171DB is supplied in tube packaging, which is standard for active production components. Selection of the substitute part eliminates obsolescence risk while maintaining full functional compatibility in RS422/RS485 half-duplex transceiver applications.

Frequently Asked Questions (FAQ)

Q: Can SN65LBC171DB be used as a direct replacement for SN65LBC171DBRG4?

A: Yes. Both parts are electrically and mechanically identical. They share the same protocol support (RS422/RS485), driver/receiver configuration (3/3), data rate (30 Mbps), supply voltage range (4.75V–5.25V), operating temperature range (-40°C to 85°C), and 20-SSOP package specification. The substitute part is the manufacturer-recommended replacement.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. SN65LBC171DBRG4 is obsolete, while SN65LBC171DB is active. The suffix variation reflects different packaging or distribution channels, but electrical performance and pinout are identical.

Q: Are there any package or mounting differences?

A: Both parts use the same 20-SSOP surface mount package with 0.209" width (5.30mm). The substitute part is supplied in tube packaging, which is standard for active components. PCB footprint and mounting requirements are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN65LBC171DBRG4 and SN65LBC171DB are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for both parts.

Q: What is the receiver hysteresis specification?

A: Both parts feature 40 mV receiver hysteresis, which defines the input threshold differential for RS422/RS485 signal detection.