SN75ALS180D Equivalent & Substitute Parts

Part Overview

The SN75ALS180D is a 1/1 transceiver with full-duplex capability for RS422 and RS485 serial communication protocols, housed 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 SN75ALS180D operates within a supply voltage range of 4.75V to 5.25V and is rated for 0°C to 70°C operating temperature.

Substiute Parts

SN75ALS180D

Texas InstrumentsIn Stock: 2365SN75ALS180D Datasheet

Current PartRFQ

SN65ALS180DR

Texas InstrumentsIn Stock: 100248SN65ALS180DR Datasheet

MFR RecommendedRFQ

ADM1491EBRZ

Analog Devices Inc.In Stock: 1381ADM1491EBRZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN75ALS180D is determined by strict equivalence in the following electrical and mechanical parameters:

• Protocol support: RS422 and RS485
• Transceiver configuration: 1/1 (one driver, one receiver)
• Duplex mode: Full-duplex operation
• Package type: 14-SOIC surface mount
• Supply voltage range: 4.75V to 5.25V
• RoHS compliance: ROHS3 Compliant

The SN65ALS180DR and ADM1491EBRZ meet these core substitution criteria. Both parts maintain identical protocol support, transceiver configuration, duplex capability, and package specifications. Differences in operating temperature range and receiver hysteresis do not prevent substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN65ALS180DR is the primary substitute for the SN75ALS180D. Both parts are manufactured by Texas Instruments, share identical electrical specifications for supply voltage and receiver hysteresis, and are housed in the same 14-SOIC package. The SN65ALS180DR carries active product status and is available in higher quantities, making it the preferred choice for new designs and production continuity.

The ADM1491EBRZ, manufactured by Analog Devices Inc., is a secondary substitute option. It maintains full protocol compatibility and identical package specifications. The ADM1491EBRZ features a lower receiver hysteresis of 30 mV and an extended operating temperature range of -40°C to 85°C, providing enhanced performance characteristics for applications requiring wider temperature operation or improved noise immunity.

Both substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SN65ALS180DR directly replace the SN75ALS180D in existing designs?

A: Yes. The SN65ALS180DR is pin-compatible and electrically equivalent for RS422 and RS485 applications. Both parts use the 14-SOIC package and operate at identical supply voltages. The SN65ALS180DR supports an extended operating temperature range of -40°C to 85°C, which encompasses the SN75ALS180D's 0°C to 70°C range.

Q: What is the difference between the SN65ALS180DR and ADM1491EBRZ?

A: Both parts are functionally equivalent for RS422 and RS485 protocols in the 14-SOIC package. The primary differences are manufacturer (Texas Instruments versus Analog Devices Inc.), receiver hysteresis (60 mV versus 30 mV), and operating temperature range (-40°C to 85°C for both, compared to the original 0°C to 70°C). The ADM1491EBRZ's lower hysteresis provides improved noise immunity in certain applications.

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

A: The SN75ALS180D and ADM1491EBRZ are supplied in Tube packaging. The SN65ALS180DR is available in Cut Tape (CT) and Digi-Reel® packaging. All three parts use the 14-SOIC surface mount package with identical physical dimensions.

Q: Why is the SN75ALS180D classified as obsolete?

A: The SN75ALS180D has been discontinued by Texas Instruments. The SN65ALS180DR serves as the active replacement, offering improved specifications and extended temperature range while maintaining full compatibility with existing designs.

Q: Can I use these parts interchangeably in production?

A: Yes, provided your application requirements fall within the operating specifications of the substitute part. Verify that the operating temperature range, receiver hysteresis, and supply voltage specifications of the selected substitute meet your design requirements.