SN75LBC175AD Equivalent & Substitute Parts

Part Overview

The SN75LBC175AD is a 0/4 Receiver interface IC manufactured by Texas Instruments, designed for RS422, RS423, and RS485 serial communication protocols. This 16-SOIC surface mount device operates at 4.75V to 5.25V supply voltage with a 50 Mbps data rate and 40 mV receiver hysteresis. The part is currently in Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain reliability for applications requiring RS422/RS423/RS485 receiver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75LBC175AD
Manufacturer	Texas Instruments
Category	Interface
Type	Receiver
Protocol	RS422, RS423, RS485
Number of Drivers/Receivers	0/4
Receiver Hysteresis	40 mV
Data Rate	50 Mbps
Voltage - Supply	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
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the SN75LBC175AD is determined by the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 16-SOIC (0.154", 3.90mm Width) — identical physical footprint required
Mounting Type: Surface Mount — same assembly process
Number of Drivers/Receivers: 0/4 — functional pin configuration match
Voltage - Supply: 4.75V ~ 5.25V — compatible power supply range
Protocol Support: RS422, RS423, RS485 — communication standard compatibility

Secondary Considerations:

Receiver Hysteresis: 40 mV (main part) vs. 45 mV (MAX3093 series) — minor variation acceptable within RS422/RS485 specifications
Data Rate: 50 Mbps (main part) vs. 10 Mbps (MAX3093 series) — substitutes operate at lower maximum rate but remain compatible
Operating Temperature: 0°C ~ 70°C (main part) vs. extended ranges in substitutes — substitutes offer equal or broader temperature coverage
RoHS and MSL Compliance: All parts meet ROHS3 and MSL 1 requirements

Substitute parts are grouped into two categories: Texas Instruments direct equivalents (SN65LBC175ADR) and Analog Devices/Maxim Integrated alternatives (MAX3093 series variants).

Parameter Comparison

Parameter	SN75LBC175AD	SN65LBC175ADR	MAX3093ECSE+	MAX3093ECSE+T	MAX3093EESE+	MAX3093EESE+T
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Type	Receiver	Receiver	Receiver	Receiver	Receiver	Receiver
Protocol	RS422, RS423, RS485	RS422, RS423, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485
Number of Drivers/Receivers	0/4	0/4	0/4	0/4	0/4	0/4
Receiver Hysteresis	40 mV	40 mV	45 mV	45 mV	45 mV	45 mV
Data Rate	50 Mbps	50 Mbps	10 Mbps	10 Mbps	10 Mbps	10 Mbps
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Last Time Buy	Active	Active	Active	Active	Active
Packaging	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Tape & Reel (TR)	Tube	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

SN65LBC175ADR (Texas Instruments)

The SN65LBC175ADR is the manufacturer-recommended direct equivalent. It maintains identical electrical specifications to the SN75LBC175AD, including 40 mV receiver hysteresis and 50 Mbps data rate. The primary advantage is extended operating temperature range (-40°C to 85°C) compared to the original part (0°C to 70°C). Product status is Active, ensuring long-term availability. This part is the preferred choice for applications requiring exact electrical performance match and continued Texas Instruments supply chain support.

MAX3093ECSE+ and MAX3093ECSE+T (Analog Devices Inc./Maxim Integrated)

These parts provide functional equivalence with minor parameter variations. Receiver hysteresis is 45 mV (5 mV higher than the original), and maximum data rate is 10 Mbps (lower than the original 50 Mbps). Both parts maintain identical supply voltage range and 16-SOIC package compatibility. Operating temperature range is 0°C to 70°C, matching the original part. Product status is Active. The MAX3093ECSE+T variant offers Tape & Reel packaging for high-volume production environments.

MAX3093EESE+ and MAX3093EESE+T (Analog Devices Inc./Maxim Integrated)

These variants provide the same electrical specifications as the MAX3093ECSE+ series with extended operating temperature range (-40°C to 85°C). Product status is Active. The MAX3093EESE+T variant offers Cut Tape & Digi-Reel packaging. These parts are suitable for applications requiring broader temperature coverage and Analog Devices supply chain integration.

All substitute parts meet ROHS3 compliance and MSL 1 requirements, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the SN65LBC175ADR be used as a direct replacement for the SN75LBC175AD?

A: Yes. The SN65LBC175ADR is the manufacturer-recommended equivalent with identical electrical specifications (40 mV hysteresis, 50 Mbps data rate, 4.75V–5.25V supply). It uses the same 16-SOIC package and maintains full pin compatibility. The extended operating temperature range (-40°C to 85°C) provides additional environmental coverage.

Q: What are the key differences between the SN75LBC175AD and MAX3093 series substitutes?

A: The MAX3093 series differs in three parameters: receiver hysteresis (45 mV vs. 40 mV), maximum data rate (10 Mbps vs. 50 Mbps), and manufacturer (Analog Devices/Maxim vs. Texas Instruments). All other specifications, including package, supply voltage, and pin configuration, remain compatible. The lower data rate specification does not affect applications operating below 10 Mbps.

Q: Are all substitute parts available in the same packaging options?

A: No. The SN75LBC175AD is supplied in Tube packaging. The SN65LBC175ADR is available in Cut Tape & Digi-Reel. MAX3093ECSE+ and MAX3093EESE+ are supplied in Tube, while MAX3093ECSE+T and MAX3093EESE+T are available in Tape & Reel and Cut Tape & Digi-Reel respectively. Packaging selection depends on production volume and assembly requirements.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN75LBC175AD specifications.

Q: Which substitute part should be selected for extended temperature applications?

A: For applications requiring operation below 0°C or above 70°C, select either SN65LBC175ADR (-40°C to 85°C), MAX3093EESE+ (-40°C to 85°C), or MAX3093EESE+T (-40°C to 85°C). These parts provide the extended temperature range while maintaining full functional compatibility.

Q: Is the 5 mV difference in receiver hysteresis (40 mV vs. 45 mV) significant for RS422/RS485 applications?

A: The 5 mV difference falls within acceptable RS422/RS485 specification tolerances. Both hysteresis values ensure reliable noise immunity and signal detection in standard serial communication applications. Selection between parts should be based on other factors such as product status, availability, and temperature requirements.

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