SN75LBC180DR Equivalent & Substitute Parts

Part Overview

The SN75LBC180DR is a 1/1 transceiver IC designed for full-duplex RS422 and RS485 communication protocols in a 14-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility across protocol support, electrical characteristics, and physical packaging specifications.

Substiute Parts

SN75LBC180DR

Texas InstrumentsIn Stock: 18836SN75LBC180DR Datasheet

Current PartRFQ

SN65LBC180DR

Texas InstrumentsIn Stock: 12817SN65LBC180DR Datasheet

MFR RecommendedRFQ

ADM1491EBRZ-REEL7

Analog Devices Inc.In Stock: 2454ADM1491EBRZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN75LBC180DR are qualified based on the following criteria:

Protocol Compatibility: Both substitute parts support RS422 and RS485 protocols, matching the primary communication standards of the main part.

Electrical Configuration: All parts maintain 1/1 driver/receiver configuration with full-duplex operation capability.

Supply Voltage Range: Substitute parts operate within the 4.75V ~ 5.25V supply voltage specification, ensuring direct compatibility with existing power delivery systems.

Package Specification: All parts are housed in 14-SOIC surface mount packages with identical physical dimensions (0.154", 3.90mm Width), permitting direct PCB layout compatibility.

Compliance Standards: All parts maintain ROHS3 compliance and MSL 1 rating, meeting environmental and moisture handling requirements.

The SN65LBC180DR represents a manufacturer-recommended direct substitute from Texas Instruments with extended operating temperature range. The ADM1491EBRZ-REEL7 from Analog Devices Inc. provides an alternative from a different manufacturer while maintaining core functional parameters.

Parameter Comparison

Engineering Selection Recommendations

SN65LBC180DR is the primary substitute option. This part is manufactured by Texas Instruments, the original manufacturer of the SN75LBC180DR, and carries active product status. It maintains identical electrical specifications for supply voltage, receiver hysteresis, and protocol support. The extended operating temperature range (-40°C ~ 85°C) provides broader environmental capability compared to the original part. Full ROHS3 compliance and MSL 1 rating ensure regulatory and manufacturing process compatibility.

ADM1491EBRZ-REEL7 is an alternative substitute from Analog Devices Inc. with active product status. This part maintains protocol compatibility and package specifications. The receiver hysteresis specification differs at 30 mV compared to 45 mV in the original part. Extended operating temperature range (-40°C ~ 85°C) and specified data rate of 16 Mbps are provided. ROHS3 compliance and MSL 1 rating are maintained.

Selection between substitute parts depends on application-specific requirements regarding receiver hysteresis tolerance and data rate specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN65LBC180DR directly replace the SN75LBC180DR in existing designs?

A: Yes. The SN65LBC180DR maintains identical package dimensions, supply voltage range, protocol support, and receiver hysteresis specification. The extended operating temperature range provides additional environmental capability without compromising compatibility.

Q: What is the significance of the receiver hysteresis difference in the ADM1491EBRZ-REEL7?

A: The ADM1491EBRZ-REEL7 specifies 30 mV receiver hysteresis compared to 45 mV in the original SN75LBC180DR. This parameter affects noise immunity and signal detection thresholds. Applications requiring the original 45 mV specification should use the SN65LBC180DR.

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

A: Yes. All parts are supplied in 14-SOIC surface mount packages with identical physical dimensions (0.154", 3.90mm Width), permitting direct PCB layout compatibility without redesign.

Q: Do substitute parts meet the same compliance requirements?

A: Yes. Both substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, matching the environmental and manufacturing process requirements of the original part.

Q: What is the data rate specification for the ADM1491EBRZ-REEL7?

A: The ADM1491EBRZ-REEL7 specifies a data rate of 16 Mbps. The original SN75LBC180DR and SN65LBC180DR do not provide explicit data rate specifications in the available parameters.