SN65LBC173N Equivalent & Substitute Parts

Part Overview

The SN65LBC173N is a 0/4 Receiver interface IC manufactured by Texas Instruments, designed for RS422, RS423, and RS485 serial communication protocols. This 16-pin DIP package device operates at 4.75V to 5.25V supply voltage with a 50Mbps data rate and 40mV receiver hysteresis. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible functionality.

Substiute Parts

SN65LBC173N

Texas InstrumentsIn Stock: 4342SN65LBC173N Datasheet

Current PartRFQ

SN65LBC173DR

Texas InstrumentsIn Stock: 7052SN65LBC173DR Datasheet

MFR RecommendedRFQ

LTC488CN#PBF

Analog Devices Inc.In Stock: 1208LTC488CN#PBF Datasheet

MFR RecommendedRFQ

LTC488IN#PBF

Linear TechnologyIn Stock: 1193LTC488IN#PBF Datasheet

MFR RecommendedRFQ

SN65LBC175AN

Texas InstrumentsIn Stock: 3706SN65LBC175AN Datasheet

Parametric EquivalentRFQ

SN65LBC175N

Texas InstrumentsIn Stock: 2280SN65LBC175N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN65LBC173N is determined by the following critical parameters: protocol support (RS422/RS423/RS485), receiver configuration (0/4), supply voltage range (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and package type (16-DIP for through-hole mounting). Substitute parts are grouped into two categories:

MFR Recommended Substitutes maintain identical or superior electrical specifications while offering active product status and improved availability. These parts are direct functional replacements with the same pin configuration and protocol support.

Parametric Equivalents provide identical electrical performance and package compatibility, ensuring seamless integration into existing designs without circuit modification.

The SN65LBC173DR represents a packaging variant (16-SOIC surface mount) of the same base device, suitable for applications requiring surface-mount technology. The LTC488CN#PBF and LTC488IN#PBF are cross-manufacturer alternatives from Analog Devices and Linear Technology, offering equivalent receiver functionality with compatible electrical specifications. The SN65LBC175AN and SN65LBC175N are parametric equivalents from Texas Instruments with identical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct pin-compatible replacement in 16-DIP through-hole packages, the SN65LBC175AN and SN65LBC175N from Texas Instruments are preferred selections. Both parts maintain active product status, ROHS3 compliance, and identical electrical specifications including 40mV receiver hysteresis and 50Mbps data rate across the full -40°C to 85°C operating temperature range.

The LTC488IN#PBF from Linear Technology provides an alternative through-hole solution with active product status and equivalent supply voltage and temperature specifications. The LTC488CN#PBF from Analog Devices offers similar functionality but with a restricted operating temperature range (0°C to 70°C), making it suitable only for applications within this narrower specification window.

For surface-mount applications, the SN65LBC173DR in 16-SOIC packaging provides an active, ROHS3-compliant alternative with identical electrical performance to the original SN65LBC173N, enabling migration to modern PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SN65LBC173DR be used as a direct replacement for the SN65LBC173N?

A: The SN65LBC173DR is electrically equivalent and functionally identical to the SN65LBC173N. However, it uses 16-SOIC surface-mount packaging instead of 16-DIP through-hole packaging. Direct PCB substitution requires different footprint and assembly methods. Both parts share identical electrical specifications, protocol support, and operating parameters.

Q: What is the difference between the SN65LBC173N and SN65LBC175AN?

A: Both parts are 16-DIP through-hole packages with identical electrical specifications: 40mV receiver hysteresis, 50Mbps data rate, 4.75V to 5.25V supply voltage, and -40°C to 85°C operating temperature. The primary difference is the base product number (65LBC173 versus 65LBC175). Both support RS422, RS423, and RS485 protocols with 0/4 receiver configuration.

Q: Why do the LTC488CN#PBF and LTC488IN#PBF have different operating temperature ranges?

A: The LTC488CN#PBF operates from 0°C to 70°C, while the LTC488IN#PBF operates from -40°C to 85°C. Selection depends on the application's thermal requirements. Applications requiring extended low-temperature operation or the full industrial temperature range must use the LTC488IN#PBF.

Q: Are all substitute parts ROHS3 compliant?

A: The SN65LBC173DR, LTC488CN#PBF, SN65LBC175AN, and SN65LBC175N are all ROHS3 compliant. The LTC488IN#PBF compliance status is not specified in the provided data.

Q: What is the significance of the 40mV versus 60mV receiver hysteresis difference?

A: Receiver hysteresis affects noise immunity and switching threshold characteristics. The SN65LBC173N, SN65LBC173DR, SN65LBC175AN, and SN65LBC175N all feature 40mV hysteresis. The LTC488CN#PBF and LTC488IN#PBF feature 60mV hysteresis, providing enhanced noise immunity in electrically noisy environments.

Q: Can the LTC488CN#PBF be used in applications requiring -40°C operation?

A: No. The LTC488CN#PBF operates only from 0°C to 70°C and is not suitable for applications requiring extended low-temperature operation. The LTC488IN#PBF or Texas Instruments alternatives (SN65LBC173N, SN65LBC175AN, SN65LBC175N) must be used for -40°C to 85°C applications.