SN75ALS173N Equivalent & Substitute Parts

Part Overview

The SN75ALS173N is a 0/4 Receiver interface IC manufactured by Texas Instruments, designed for RS422, RS423, and RS485 serial communication protocols. This device operates in the Through Hole 16-DIP package format with a supply voltage range of 4.75V to 5.25V and an operating temperature range of 0°C to 70°C. The SN75ALS173N is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering improved availability and product status.

Substiute Parts

SN75ALS173N

Texas InstrumentsIn Stock: 1578SN75ALS173N Datasheet

Current PartRFQ

SN75ALS173NSR

Texas InstrumentsIn Stock: 4218SN75ALS173NSR Datasheet

MFR RecommendedRFQ

SN75173N

Texas InstrumentsIn Stock: 2823SN75173N Datasheet

Parametric EquivalentRFQ

LTC488CN#PBF

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

MFR RecommendedRFQ

SN75ALS175N

Texas InstrumentsIn Stock: 4201SN75ALS175N Datasheet

MFR RecommendedRFQ

SN75175N

Texas InstrumentsIn Stock: 3838SN75175N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN75ALS173N is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Protocol support: RS422, RS423, RS485
• Number of Drivers/Receivers: 0/4 configuration
• Receiver Hysteresis: 50 mV
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C
• RoHS Status: ROHS3 Compliant

Packaging Considerations: Substitutes are grouped into two categories based on mounting type: Through Hole (16-DIP) and Surface Mount (16-SOIC). Through Hole substitutes maintain identical package dimensions and PCB footprints. Surface Mount substitutes require PCB redesign but offer improved availability and active product status.

Substitute Categories:

1. Direct Parametric Equivalent (Through Hole): SN75173N maintains identical electrical parameters and Through Hole packaging, differing only in base product number and active product status.

2. Manufacturer Recommended (Through Hole): SN75ALS175N provides identical electrical specifications and Through Hole packaging with the same base series designation.

3. Manufacturer Recommended (Surface Mount): SN75ALS173NSR offers identical electrical parameters in Surface Mount 16-SOIC packaging with active product status.

4. Cross-Manufacturer Equivalent (Through Hole): LTC488CN#PBF from Analog Devices Inc. supports RS422 and RS485 protocols with 60 mV receiver hysteresis, maintaining Through Hole 16-DIP packaging.

5. Parametric Equivalent (Through Hole): SN75175N provides identical electrical parameters and Through Hole packaging with active product status.

Parameter Comparison

Engineering Selection Recommendations

For Through Hole PCB Designs (No Redesign Required):

SN75173N is the preferred substitute for the obsolete SN75ALS173N. Both devices maintain identical electrical parameters, Through Hole 16-DIP packaging, and ROHS3 compliance. SN75173N offers active product status with 2792 pieces in stock, ensuring long-term availability for production and design continuity.

SN75175N provides an alternative Through Hole substitute with identical electrical specifications and active product status. This device offers 3816 pieces in stock and maintains full compatibility with the original SN75ALS173N electrical requirements.

For Surface Mount PCB Designs (PCB Redesign Required):

SN75ALS173NSR is the manufacturer-recommended Surface Mount substitute, offering identical electrical parameters in 16-SOIC packaging. This device has active product status with 4200 pieces in stock, providing superior availability for new production designs. Surface Mount implementation requires PCB layout modification but enables higher-density board designs.

For Cross-Manufacturer Substitution:

LTC488CN#PBF from Analog Devices Inc. provides a Through Hole alternative with active product status and 1175 pieces in stock. This device supports RS422 and RS485 protocols with 60 mV receiver hysteresis, differing from the original 50 mV specification. The LTC488CN#PBF maintains 4.75V to 5.25V supply voltage and 0°C to 70°C operating temperature compatibility with ROHS3 compliance.

Product Status Considerations:

SN75ALS173N and SN75ALS175N are classified as Obsolete. Active substitutes (SN75173N, SN75175N, SN75ALS173NSR, LTC488CN#PBF) ensure compliance with current manufacturing standards and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN75173N directly replace SN75ALS173N without PCB modifications?

A: Yes. SN75173N maintains identical electrical parameters (0/4 Receiver, RS422/RS423/RS485 protocols, 50 mV hysteresis, 4.75V-5.25V supply, 0°C-70°C operating range) and Through Hole 16-DIP packaging. No PCB redesign is required.

Q: What is the difference between SN75ALS173NSR and SN75ALS173N?

A: SN75ALS173NSR is the Surface Mount variant in 16-SOIC packaging, while SN75ALS173N is Through Hole 16-DIP. Electrical parameters are identical. SN75ALS173NSR has active product status and requires PCB redesign for implementation.

Q: Why does LTC488CN#PBF have 60 mV hysteresis instead of 50 mV?

A: LTC488CN#PBF is a cross-manufacturer equivalent from Analog Devices Inc. with slightly different receiver hysteresis specification. Both values fall within acceptable RS422/RS485 receiver design tolerances. The device maintains identical supply voltage and operating temperature ranges.

Q: Which substitute offers the best long-term availability?

A: SN75ALS173NSR (Surface Mount) has the highest inventory at 4200 pieces with active product status. For Through Hole designs, SN75175N offers 3816 pieces in stock with active status.

Q: Can I use SN75ALS175N as a substitute?

A: SN75ALS175N is classified as Obsolete and is not recommended for new designs despite identical electrical parameters. Active alternatives (SN75173N, SN75175N, SN75ALS173NSR) provide superior long-term supply chain stability.

Q: What packaging formats are available for substitutes?

A: Through Hole 16-DIP packaging is available in SN75173N, SN75ALS175N, SN75175N, and LTC488CN#PBF. Surface Mount 16-SOIC packaging is available in SN75ALS173NSR. Package selection depends on PCB design requirements and manufacturing capabilities.