SN75ALS175N Equivalent & Substitute Parts

Part Overview

The SN75ALS175N is a 0/4 Receiver IC for RS422, RS423, and RS485 serial communication protocols, manufactured by Texas Instruments in a 16-PDIP through-hole package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer functional compatibility within defined parameter tolerances.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75ALS175N
Manufacturer	Texas Instruments
Category	Interface
Type	Receiver
Protocol	RS422, RS423, RS485
Number of Drivers/Receivers	0/4
Receiver Hysteresis	50 mV
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SN75ALS175N is determined by strict equivalence in the following critical parameters:

Protocol support: RS422, RS423, RS485
Number of Drivers/Receivers: 0/4
Receiver Hysteresis: 50 mV
Voltage Supply Range: 4.75V ~ 5.25V
Operating Temperature Range: 0°C ~ 70°C
Package / Case: 16-DIP (0.300", 7.62mm)
Mounting Type: Through Hole

Substitute parts are grouped into two categories: parametric equivalents (identical specifications) and manufacturer-recommended alternatives (active product status with minor parameter variations). Parts meeting all critical parameters are direct substitutes. Parts with extended operating temperature ranges or different receiver hysteresis values are listed as alternatives with noted parameter differences.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Mounting Type	Product Status
SN75ALS175N	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-DIP	Through Hole	Obsolete
SN75ALS175NSR	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Surface Mount	Active
SN75173N	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-DIP	Through Hole	Active
SN75175N	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-DIP	Through Hole	Active
SN75ALS173N	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-DIP	Through Hole	Obsolete
LTC489CN#PBF	Analog Devices Inc.	RS422, RS485	0/4	60 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-DIP	Through Hole	Active
LTC489IN#PBF	Analog Devices Inc.	RS422, RS485	0/4	60 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-DIP	Through Hole	Active

Engineering Selection Recommendations

For through-hole mounting applications requiring direct pin-for-pin compatibility with identical electrical specifications, SN75173N and SN75175N are active Texas Instruments alternatives. Both parts maintain the 50 mV receiver hysteresis, identical supply voltage range, and 0°C to 70°C operating temperature specification of the SN75ALS175N.

For surface-mount applications, SN75ALS175NSR provides equivalent electrical performance in a 16-SOIC package with active product status and ROHS3 compliance.

Analog Devices LTC489CN#PBF and LTC489IN#PBF are cross-manufacturer alternatives supporting RS422 and RS485 protocols. The LTC489CN#PBF maintains the 0°C to 70°C operating temperature range, while LTC489IN#PBF extends operation to -40°C to 85°C. Both parts feature 60 mV receiver hysteresis, a 10 mV increase from the SN75ALS175N specification. Both are ROHS3 compliant and available in 16-DIP through-hole packages.

Frequently Asked Questions (FAQ)

Q: Can SN75173N and SN75175N be used as direct replacements for SN75ALS175N?

A: Yes. Both parts are Texas Instruments receivers with identical protocol support (RS422, RS423, RS485), driver/receiver configuration (0/4), receiver hysteresis (50 mV), supply voltage range (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), and 16-DIP through-hole package. Both are active products.

Q: What is the difference between SN75ALS175NSR and SN75ALS175N?

A: The primary difference is packaging and mounting type. SN75ALS175NSR uses a 16-SOIC surface-mount package, while SN75ALS175N uses a 16-DIP through-hole package. All electrical specifications are identical. SN75ALS175NSR is active; SN75ALS175N is obsolete.

Q: Can LTC489CN#PBF replace SN75ALS175N?

A: LTC489CN#PBF is functionally compatible for RS422 and RS485 applications. It maintains the same supply voltage range (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), and 16-DIP through-hole package. The receiver hysteresis is 60 mV compared to 50 mV on the SN75ALS175N. RS423 protocol support is not specified for the LTC489CN#PBF.

Q: What is the operating temperature difference between LTC489CN#PBF and LTC489IN#PBF?

A: LTC489CN#PBF operates from 0°C to 70°C, matching the SN75ALS175N specification. LTC489IN#PBF extends the operating range to -40°C to 85°C for applications requiring wider temperature tolerance. Both parts are otherwise electrically identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the SN75ALS175N specification.

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