SN75173D Equivalent & Substitute Parts

Part Overview

The SN75173D is a 0/4 Receiver RS422/RS485 interface IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as Last Time Buy, indicating limited availability and the necessity to identify equivalent alternatives for ongoing design requirements and production planning. The SN75173D serves as a receiver in serial communication applications requiring RS422 or RS485 protocol support.

Substiute Parts

SN75173D

Texas InstrumentsIn Stock: 2033SN75173D Datasheet

Current PartRFQ

SN75173DR

Texas InstrumentsIn Stock: 1306SN75173DR Datasheet

MFR RecommendedRFQ

LTC488CSW#PBF

Analog Devices Inc.In Stock: 2061LTC488CSW#PBF Datasheet

MFR RecommendedRFQ

LTC488CSW#TRPBF

Analog Devices Inc.In Stock: 1991LTC488CSW#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN75173D is determined by the following critical parameters:

• Protocol Support: RS422 and RS485 compatibility required
• Receiver Configuration: 0/4 receiver architecture
• Supply Voltage: 4.75V ~ 5.25V operating range
• Operating Temperature: 0°C ~ 70°C range
• Receiver Hysteresis: 50 mV specification
• Package Type: 16-SOIC surface mount configuration
• Compliance: ROHS3 compliant, MSL Level 1

The identified substitute parts maintain functional equivalence across these parameters. Variations in receiver hysteresis (50 mV vs. 60 mV) and package width dimensions represent minor deviations within acceptable engineering tolerances for RS422/RS485 receiver applications.

Parameter Comparison

Engineering Selection Recommendations

SN75173DR (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications to the SN75173D, including receiver hysteresis and package dimensions. The SN75173DR carries Active product status with continuous availability, eliminating supply chain risk associated with the Last Time Buy status of the original part. Both parts share the same base product number (SN75173) and are functionally interchangeable at the circuit level.

LTC488CSW#PBF and LTC488CSW#TRPBF (Analog Devices Inc.) provide alternative substitution options with Active product status. These parts maintain equivalent electrical performance across supply voltage, operating temperature, and receiver configuration. The receiver hysteresis specification differs at 60 mV compared to 50 mV, representing a minor parameter variation. Package width dimensions are larger (0.295" vs. 0.154"), requiring PCB layout verification for physical compatibility. The LTC488CSW#TRPBF variant offers Tape & Reel packaging, while LTC488CSW#PBF is supplied in Tube packaging.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can SN75173DR be used as a direct replacement for SN75173D?

A: Yes. The SN75173DR is functionally equivalent to the SN75173D. Both parts share identical receiver hysteresis (50 mV), supply voltage range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and package dimensions (16-SOIC, 0.154" width). No circuit modifications are required.

Q: What is the difference between SN75173DR and the Analog Devices LTC488CSW alternatives?

A: The primary differences are manufacturer and receiver hysteresis specification. SN75173DR maintains 50 mV hysteresis matching the original SN75173D. The LTC488CSW variants specify 60 mV hysteresis. Both support RS422/RS485 protocols and operate within the same supply voltage and temperature ranges. Package width differs: SN75173DR uses 0.154" width, while LTC488CSW parts use 0.295" width.

Q: Are there PCB layout considerations when substituting with LTC488CSW parts?

A: Yes. The LTC488CSW#PBF and LTC488CSW#TRPBF have larger package width (0.295" vs. 0.154"), which may affect PCB footprint compatibility. Verify that the PCB layout accommodates the wider package dimensions before implementation. Pin configuration and electrical interface remain compatible.

Q: What packaging options are available for each substitute part?

A: SN75173DR is available in Cut Tape (CT) and Digi-Reel® packaging. LTC488CSW#PBF is supplied in Tube packaging. LTC488CSW#TRPBF is supplied in Tape & Reel (TR) packaging. Select the packaging option based on production volume and assembly process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN75173DR, LTC488CSW#PBF, and LTC488CSW#TRPBF are all ROHS3 compliant with MSL Level 1 rating, maintaining full regulatory compatibility with the original SN75173D specification.