SN65ALS176D Equivalent & Substitute Parts

Part Overview

The SN65ALS176D is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in an 8-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 operates within a 4.75V to 5.25V supply range and supports data rates up to 35 Mbps with a receiver hysteresis of 60 mV across an operating temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN65ALS176D
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Duplex Configuration	Half
Number of Drivers/Receivers	1/1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Data Rate	35 Mbps
Voltage - Supply	4.75V ~ 5.25V
Receiver Hysteresis	60 mV
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN65ALS176D is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol support: RS422 and RS485
Duplex configuration: Half-duplex operation
Driver/Receiver configuration: 1/1 (single driver, single receiver)
Package type: 8-SOIC surface mount
Physical dimensions: 0.154" width, 3.90mm width

Secondary Compatibility Criteria:

Voltage supply range: Must support 4.75V to 5.25V operation
Data rate: Minimum 35 Mbps capability
Operating temperature range: Minimum -40°C to 85°C coverage
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Category 1: Direct Replacements (Texas Instruments SN65ALS176 Series) SN65ALS176DR represents the active production equivalent with identical electrical specifications and packaging. This part maintains full pin-for-pin compatibility and identical performance characteristics.

Category 2: Functional Equivalents (Alternative Manufacturers) Parts from Analog Devices (ADM1485 series), Renesas (ISL3179, ISL43485 series), and Holt Integrated Circuits (HI-4853) meet the core protocol, duplex, and package requirements while operating within compatible voltage and temperature ranges. These parts support RS422/RS485 half-duplex operation in 8-SOIC packages with supply voltages spanning or overlapping the 4.75V to 5.25V range.

Parameter Comparison

Part Number	Manufacturer	Protocol	Duplex	Package	Data Rate	Supply Voltage	Temp Range	Product Status
SN65ALS176D	Texas Instruments	RS422, RS485	Half	8-SOIC	35 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	Obsolete
SN65ALS176DR	Texas Instruments	RS422, RS485	Half	8-SOIC	35 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	Active
ADM1485ARZ	Analog Devices Inc.	RS422, RS485	Half	8-SOIC	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	Active
ADM1485ARZ-REEL	Analog Devices Inc.	RS422, RS485	Half	8-SOIC	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	Active
ADM1485ARZ-REEL7	Analog Devices Inc.	RS422, RS485	Half	8-SOIC	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	Active
HI-4853PSHF	Holt Integrated Circuits Inc.	RS422, RS485	Half	8-SOIC	20 Mbps	3.15V ~ 5.5V	-55°C ~ 175°C	Active
ISL3179EFBZ	Renesas Electronics Corporation	RS422, RS485	Half	8-SOIC	40 Mbps	3V ~ 3.6V	-40°C ~ 125°C	Active
ISL3179EIBZ	Renesas Electronics Corporation	RS422, RS485	Half	8-SOIC	40 Mbps	3V ~ 3.6V	-40°C ~ 125°C	Active
ISL3179EIBZ-T	Renesas Electronics Corporation	RS422, RS485	Half	8-SOIC	40 Mbps	3V ~ 3.6V	-40°C ~ 85°C	Active
ISL43485IBZ	Renesas Electronics Corporation	RS422, RS485	Half	8-SOIC	50 Mbps	3V ~ 3.6V	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Recommended Primary Substitute: SN65ALS176DR

The SN65ALS176DR is the direct active production replacement from Texas Instruments. It maintains identical electrical specifications, pin configuration, and performance characteristics to the obsolete SN65ALS176D. This part is ROHS3 compliant with MSL 1 rating and is currently in active production status with 2,131 units in stock.

Alternative Substitutes by Application Requirements:

For applications requiring extended temperature operation (-55°C to 175°C), the HI-4853PSHF from Holt Integrated Circuits provides half-duplex RS422/RS485 operation in an 8-SOIC package with a wider supply voltage range (3.15V to 5.5V). This part is ROHS3 compliant and active in production.

For applications operating at 3V to 3.6V supply voltages, the Renesas ISL3179 series (ISL3179EFBZ, ISL3179EIBZ, ISL3179EIBZ-T) and ISL43485IBZ provide half-duplex RS422/RS485 transceiver functionality in 8-SOIC packages. These parts support higher data rates (40 Mbps to 50 Mbps) and are ROHS3 compliant with MSL 3 ratings.

For applications requiring 4.75V to 5.25V supply operation with active production status, the Analog Devices ADM1485 series (ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7) provides half-duplex RS422/RS485 operation in 8-SOIC packages. These parts support 30 Mbps data rates and are ROHS3 compliant with MSL 1 ratings.

All recommended substitutes are ROHS3 compliant and carry REACH Unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN65ALS176DR be used as a direct replacement for SN65ALS176D?

A: Yes. The SN65ALS176DR is the active production equivalent with identical electrical specifications, pin configuration, and performance. It operates within the same 4.75V to 5.25V supply range, supports 35 Mbps data rates, and maintains the same 8-SOIC package dimensions.

Q: What is the key difference between the ADM1485 series and the SN65ALS176D?

A: The ADM1485 series supports a maximum data rate of 30 Mbps compared to 35 Mbps for the SN65ALS176D. Both operate within the 4.75V to 5.25V supply range and provide half-duplex RS422/RS485 operation in 8-SOIC packages. The ADM1485 series is suitable for applications not requiring the full 35 Mbps bandwidth.

Q: Can ISL3179 series parts replace the SN65ALS176D in 5V systems?

A: No. The ISL3179 series operates at 3V to 3.6V supply voltages and is not compatible with the 4.75V to 5.25V supply range of the SN65ALS176D. These parts are suitable only for 3.3V systems.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Tube and Cut Tape (CT) & Digi-Reel packaging formats. The SN65ALS176DR, ADM1485 series, and Renesas ISL3179/ISL43485 series are available in both formats. Packaging selection depends on procurement and assembly requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts listed are ROHS3 compliant and carry REACH Unaffected status, meeting current environmental and regulatory requirements for electronic components.

Q: Which substitute part supports the widest operating temperature range?

A: The HI-4853PSHF from Holt Integrated Circuits supports an operating temperature range of -55°C to 175°C, which is wider than the SN65ALS176D range of -40°C to 85°C. This part is suitable for extended temperature applications.

Q: What is the difference between ISL3179EIBZ and ISL3179EIBZ-T?

A: Both parts are functionally identical with 40 Mbps data rate capability and 3V to 3.6V supply operation. The primary difference is packaging format: ISL3179EIBZ is supplied in Tube, while ISL3179EIBZ-T is supplied in Cut Tape (CT) & Digi-Reel format. The ISL3179EIBZ-T operating temperature range is -40°C to 85°C.

Q: Can the ISL43485IBZ be used in place of the SN65ALS176D?

A: The ISL43485IBZ provides half-duplex RS422/RS485 operation in an 8-SOIC package with a higher data rate of 50 Mbps. However, it operates at 3V to 3.6V supply voltages and is not compatible with the 4.75V to 5.25V supply range of the SN65ALS176D. This part is suitable only for 3.3V systems.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message