SN75175D Equivalent & Substitute Parts

Part Overview

The SN75175D is a 0/4 Receiver IC for RS422, RS423, and RS485 serial communication protocols, manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as Last Time Buy, indicating limited availability and the necessity to identify functionally equivalent alternatives for ongoing design requirements and production planning.

Substitute parts are required to maintain design continuity, ensure supply chain resilience, and support long-term product lifecycle management when the primary part reaches end-of-life status.

Key Parameters

Parameter	SN75175D
Manufacturer	Texas Instruments
Type	Receiver
Protocol Support	RS422, RS423, RS485
Number of Drivers/Receivers	0/4
Receiver Hysteresis	50 mV
Voltage Supply Range	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the SN75175D is determined by the following critical parameters:

Package Compatibility: 16-SOIC surface mount package with matching pinout
Protocol Support: RS422, RS423, RS485 serial communication capability
Receiver Configuration: 0/4 receiver architecture
Electrical Specifications: Supply voltage range, receiver hysteresis, and operating temperature range
Compliance: RoHS3 compliance and regulatory certifications

Substitute parts are grouped into two categories based on operational parameter alignment:

Category A - Direct Electrical Equivalents (SN75175DR): Identical electrical specifications and protocol support with different packaging format (Cut Tape & Digi-Reel).

Category B - Compatible Alternatives (DS3486M/NOPB, DS3486MX/NOPB, DS34C86TM/NOPB, DS34C86TMX/NOPB): Texas Instruments parts with identical package and mounting type but variations in receiver hysteresis and operating temperature range.

Category C - Cross-Manufacturer Alternative (LTC489CSW#PBF, LTC489CSW#TRPBF): Analog Devices equivalent with compatible protocol support and electrical performance, different package width specification.

Parameter Comparison

Part Number	Manufacturer	Protocol	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	Product Status	Inventory
SN75175D	Texas Instruments	RS422, RS423, RS485	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.154")	Last Time Buy	2100 Pcs
SN75175DR	Texas Instruments	RS422, RS423, RS485	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.154")	Active	30100 Pcs
DS3486M/NOPB	Texas Instruments	RS422, RS423	140 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.154")	Active	6027 Pcs
DS3486MX/NOPB	Texas Instruments	RS422, RS423	140 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.154")	Active	1501 Pcs
DS34C86TM/NOPB	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC (0.154")	Active	3967 Pcs
DS34C86TMX/NOPB	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC (0.154")	Active	9983 Pcs
LTC489CSW#PBF	Analog Devices Inc.	RS422, RS485	60 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.295")	Active	1983 Pcs
LTC489CSW#TRPBF	Analog Devices Inc.	RS422, RS485	60 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.295")	Active	6432 Pcs

Engineering Selection Recommendations

Primary Recommendation: SN75175DR

SN75175DR is the direct equivalent to SN75175D with identical electrical specifications, protocol support, and operating parameters. This part maintains Active product status with significantly higher inventory availability (30100 Pcs). The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect electrical performance or PCB integration.

Secondary Recommendations: DS34C86TM/NOPB or DS34C86TMX/NOPB

These parts provide extended operating temperature range (-40°C ~ 85°C) and wider supply voltage tolerance (4.5V ~ 5.5V) compared to the SN75175D. Both maintain Active product status and 16-SOIC package compatibility. The DS34C86TMX/NOPB variant offers the highest inventory level (9983 Pcs) among extended-temperature options. These are suitable for applications requiring enhanced thermal performance.

Tertiary Recommendation: LTC489CSW#TRPBF

The LTC489CSW#TRPBF from Analog Devices provides cross-manufacturer compatibility with RS422 and RS485 protocol support. This part maintains identical supply voltage range and operating temperature to the SN75175D. The package width specification (0.295" versus 0.154") requires PCB layout verification before implementation. This option provides supply diversification and Active product status with 6432 Pcs inventory.

All recommended substitutes maintain ROHS3 compliance and equivalent regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can SN75175DR be used as a direct replacement for SN75175D?

A: Yes. SN75175DR is electrically and functionally identical to SN75175D. The difference is packaging format (Cut Tape & Digi-Reel versus Tube). Both use the same 16-SOIC package with 0.154" width and identical pinout. No circuit modifications are required.

Q: What is the difference between the DS3486 and DS34C86 series?

A: The DS34C86 series provides extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) and wider supply voltage tolerance (4.5V ~ 5.5V versus 4.75V ~ 5.25V). The DS3486 series maintains the standard industrial temperature and voltage specifications. Both support RS422 and RS423 protocols with 16-SOIC packaging.

Q: Why does the SN75175D support RS485 while some substitutes only support RS422/RS423?

A: The DS3486 and DS34C86 series are designed for RS422 and RS423 protocols. If RS485 protocol support is required for your application, use SN75175DR, LTC489CSW#PBF, or LTC489CSW#TRPBF, which explicitly support RS485 in addition to RS422.

Q: What is the impact of different receiver hysteresis values?

A: Receiver hysteresis affects noise immunity and signal transition characteristics. The SN75175D has 50 mV hysteresis. The DS3486 series has 140 mV (higher noise immunity), and the DS34C86 and LTC489 series have 60 mV (closer to the original). Higher hysteresis values reduce sensitivity to noise but may increase transition time. Verify compatibility with your signal integrity requirements.

Q: Can I use the LTC489CSW#TRPBF in place of SN75175D?

A: The LTC489CSW#TRPBF is functionally compatible for RS422 and RS485 applications. However, the package width differs (0.295" versus 0.154"), which may affect PCB layout and footprint compatibility. Verify that your PCB design accommodates the wider package before implementation.

Q: Which substitute has the best inventory availability?

A: DS34C86TMX/NOPB has the highest inventory level at 9983 Pcs, followed by SN75175DR at 30100 Pcs. For immediate availability with identical specifications, SN75175DR is the optimal choice.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

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