SN65LBC174DW Equivalent & Substitute Parts

Part Overview

The SN65LBC174DW 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 limited future availability. Identifying equivalent and substitute parts is essential for design continuity, inventory management, and long-term product support in applications requiring RS422/RS485 communication protocols.

Substiute Parts

SN65LBC174DW

Texas InstrumentsIn Stock: 1959SN65LBC174DW Datasheet

Current PartRFQ

SN65LBC174DWR

Texas InstrumentsIn Stock: 4874SN65LBC174DWR Datasheet

MFR RecommendedRFQ

SN65LBC174ADW

Texas InstrumentsIn Stock: 2218SN65LBC174ADW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN65LBC174DW is determined by strict equivalence across the following critical parameters:

• Protocol support: RS422 and RS485
• Driver/Receiver configuration: 4/0 (4 drivers, 0 receivers)
• Electrical specifications: 40 mV receiver hysteresis, 30 Mbps data rate, 4.75V–5.25V supply voltage
• Operating temperature range: -40°C to 85°C
• Package type: 20-SOIC surface mount
• Compliance: ROHS3, MSL 1

The identified substitutes maintain full electrical and mechanical compatibility with the main part number. Differences in product status and packaging format (Tube vs. standard) do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

For new designs and long-term applications, SN65LBC174DWR is the preferred substitute due to its Active product status, ensuring continued availability and manufacturer support. This part is functionally identical to the main part number across all electrical and mechanical parameters.

SN65LBC174ADW serves as a parametric equivalent with identical electrical specifications and package configuration. However, its Last Time Buy status aligns it with the original part number in terms of supply lifecycle considerations.

Both substitutes are ROHS3 compliant and carry MSL 1 rating, meeting environmental and reliability requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can SN65LBC174DWR be used as a direct replacement for SN65LBC174DW?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including protocol support, driver/receiver configuration, data rate, supply voltage, operating temperature range, and 20-SOIC package dimensions. The primary difference is product status; SN65LBC174DWR is Active while SN65LBC174DW is Last Time Buy.

Q: What is the difference between SN65LBC174DW and SN65LBC174ADW?

A: Both parts are parametric equivalents with identical electrical specifications and package type. The difference lies in product lifecycle status: SN65LBC174DW is Last Time Buy, while SN65LBC174ADW is also Last Time Buy. Both maintain full compatibility in RS422/RS485 applications.

Q: Are there any package or mounting differences between these substitutes?

A: No. All three parts use the same 20-SOIC surface mount package with 0.295" width and 7.50mm dimensions. PCB layout and reflow soldering parameters remain unchanged across substitutions.

Q: Do these parts meet RoHS and environmental compliance requirements?

A: Yes. All three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.

Q: Which substitute should be selected for new production designs?

A: SN65LBC174DWR is recommended for new designs due to its Active product status, ensuring long-term availability and manufacturer support. It provides identical functionality to the original part number.