SN75LBC180AD Equivalent & Substitute Parts

Part Overview

The SN75LBC180AD is a full-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device provides single driver and receiver functionality with 50 mV receiver hysteresis and supports data rates up to 30 Mbps at supply voltages between 4.75V and 5.25V.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75LBC180AD
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	50 mV
Data Rate	30 Mbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SN75LBC180AD is determined by the following critical parameters:

Electrical Compatibility Requirements:

Protocol support: RS422 and RS485
Duplex mode: Full-duplex operation
Number of drivers/receivers: 1/1 configuration
Receiver hysteresis: 50 mV
Package type: 14-SOIC form factor

Operational Constraints:

Supply voltage range compatibility
Operating temperature range
Data rate capability
Mounting type: Surface mount

Substitute parts are grouped into two categories based on supply voltage requirements:

Category 1 - Texas Instruments Direct Substitutes (5V Supply): SN65LBC180ADR and SN75LBC180ADR maintain the original 4.75V to 5.25V supply voltage specification and identical electrical performance characteristics.

Category 2 - Analog Devices Alternatives (3V Supply): ADM3491ARZ, ADM3491ARZ-REEL, and ADM3491ARZ-REEL7 operate at 3V to 3.6V supply voltage with extended temperature range and active product status, suitable for applications where lower supply voltage is acceptable.

Parameter Comparison

Parameter	SN75LBC180AD	SN65LBC180ADR	SN75LBC180ADR	ADM3491ARZ	ADM3491ARZ-REEL	ADM3491ARZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Protocol	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485
Number of Drivers/Receivers	1/1	1/1	1/1	1/1	1/1	1/1
Duplex	Full	Full	Full	Full	Full	Full
Receiver Hysteresis	50 mV	50 mV	50 mV	50 mV	50 mV	50 mV
Data Rate	30 Mbps	30 Mbps	30 Mbps	10 Mbps	10 Mbps	10 Mbps
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For 5V Supply Systems with 30 Mbps Requirement:

SN65LBC180ADR is the primary recommended substitute. This part maintains identical electrical specifications to the SN75LBC180AD while offering active product status and extended operating temperature range (-40°C to 85°C). The part is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging with substantial inventory (120,400 units).

SN75LBC180ADR provides an alternative within the Texas Instruments product line, maintaining the original 0°C to 70°C temperature specification and 30 Mbps data rate. However, this part retains obsolete status.

For 3V Supply Systems with 10 Mbps Capability:

ADM3491ARZ-REEL7 is recommended for applications accepting reduced data rate (10 Mbps) and lower supply voltage (3V to 3.6V). This Analog Devices part offers active product status, extended temperature range (-40°C to 85°C), and high inventory availability (30,153 units). The Cut Tape and Digi-Reel packaging supports production requirements.

ADM3491ARZ-REEL provides equivalent specifications in alternative packaging format with 17,164 units in stock.

ADM3491ARZ in Tube packaging offers the same electrical characteristics with lower inventory (1,373 units).

All substitute options maintain ROHS3 compliance and identical 14-SOIC package dimensions, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can ADM3491ARZ parts directly replace SN75LBC180AD in existing designs?

A: Direct replacement requires design review. The ADM3491ARZ operates at 3V to 3.6V supply voltage compared to the SN75LBC180AD's 4.75V to 5.25V requirement. Additionally, the ADM3491ARZ supports 10 Mbps data rate versus 30 Mbps for the original part. Mechanical compatibility is confirmed through identical 14-SOIC packaging.

Q: What is the difference between ADM3491ARZ, ADM3491ARZ-REEL, and ADM3491ARZ-REEL7?

A: These parts are electrically identical. The differences are in packaging format: ADM3491ARZ is supplied in Tube packaging, while ADM3491ARZ-REEL and ADM3491ARZ-REEL7 are supplied in Cut Tape and Digi-Reel format. Selection depends on production volume and handling requirements.

Q: Is SN65LBC180ADR a complete substitute for SN75LBC180AD?

A: SN65LBC180ADR is a complete electrical and mechanical substitute. Both parts operate at 4.75V to 5.25V supply voltage, support 30 Mbps data rate, and use identical 14-SOIC packaging. SN65LBC180ADR offers the advantage of active product status and extended operating temperature range (-40°C to 85°C versus 0°C to 70°C).

Q: Why do some substitutes have lower data rate specifications?

A: The Analog Devices ADM3491 series is specified for 10 Mbps operation, which is a design characteristic of that product line. Applications requiring 30 Mbps performance must use Texas Instruments SN65LBC180ADR or equivalent parts from the SN75LBC180 family.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental certification of the original SN75LBC180AD.

Q: What packaging options are available for production?

A: SN65LBC180ADR is available in Cut Tape and Digi-Reel packaging. ADM3491ARZ variants are available in Tube (ADM3491ARZ) or Cut Tape and Digi-Reel (ADM3491ARZ-REEL and ADM3491ARZ-REEL7) formats. Selection depends on assembly equipment compatibility and order quantities.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message