SN75176BP RS422/RS485 Half Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The SN75176BP is an active RS422/RS485 half-duplex transceiver manufactured by Texas Instruments, supplied in 8-DIP through-hole packaging. This interface IC is designed for industrial communication networks requiring robust half-duplex serial data transmission. The part is currently in active production status with 59,270 units in stock. Equivalent and substitute parts are necessary when addressing supply constraints, extended lead times, or specific application requirements that may benefit from alternative electrical characteristics or temperature ratings.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75176BP
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex Mode	Half
Receiver Hysteresis	50 mV
Voltage Supply Range	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SN75176BP is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS422/RS485 half-duplex operation
Number of Drivers/Receivers: 1/1 configuration
Duplex Mode: Half-duplex only
Voltage Supply Range: 4.75V ~ 5.25V
Package / Case: 8-DIP (0.300", 7.62mm)
Mounting Type: Through Hole

Allowable Variation Parameters:

Receiver Hysteresis: 30 mV to 70 mV (SN75176BP baseline: 50 mV)
Operating Temperature: -40°C ~ 85°C to 0°C ~ 70°C (SN75176BP baseline: 0°C ~ 70°C)
Data Rate: Specifications ranging from 2.5 Mbps to 30 Mbps

All substitute parts listed maintain identical supply voltage, package configuration, and protocol support. Variations in receiver hysteresis, operating temperature range, and data rate specifications do not prevent functional substitution in standard RS422/RS485 applications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis (mV)	Supply Voltage	Operating Temp (°C)	Data Rate	Package	Inventory (Pcs)
SN75176BP	Texas Instruments	RS422, RS485	1/1	Half	50	4.75V ~ 5.25V	0 ~ 70	—	8-DIP	59,270
LTC1485CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Half	60	4.75V ~ 5.25V	0 ~ 70	—	8-DIP	2,220
ADM1485ANZ	Analog Devices Inc.	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	-40 ~ 85	30 Mbps	8-DIP	1,920
ADM1485JNZ	Analog Devices Inc.	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	0 ~ 70	30 Mbps	8-DIP	1,800
ADM485ANZ	Analog Devices Inc.	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	-40 ~ 85	5 Mbps	8-DIP	4,049
ADM485JNZ	Analog Devices Inc.	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	0 ~ 70	5 Mbps	8-DIP	6,300
LTC1482CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Half	30	4.75V ~ 5.25V	0 ~ 70	4 Mbps	8-DIP	1,375
LTC485CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	0 ~ 70	—	8-DIP	3,155
MAX485CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	0 ~ 70	2.5 Mbps	8-DIP	3,179
MAX485EPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Half	70	4.75V ~ 5.25V	-40 ~ 85	2.5 Mbps	8-DIP	23,407

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the SN75176BP baseline. Selection among equivalent parts should be based on the following criteria:

For Standard Industrial Applications (0°C ~ 70°C): LTC1485CN8#PBF, ADM1485JNZ, ADM485JNZ, LTC1482CN8#PBF, LTC485CN8#PBF, and MAX485CPA+ are direct functional equivalents with identical operating temperature ranges. These parts are suitable for indoor industrial environments and standard commercial applications.

For Extended Temperature Range Applications (-40°C ~ 85°C): ADM1485ANZ and MAX485EPA+ provide extended operating temperature specifications. MAX485EPA+ offers the highest inventory availability (23,407 units) among extended-range options and is recommended for applications requiring wide temperature tolerance.

For High-Speed Data Rate Requirements: ADM1485ANZ and ADM1485JNZ support 30 Mbps data rates, compared to the SN75176BP baseline specification. These parts are suitable for applications requiring faster serial communication within RS422/RS485 protocol constraints.

For Low-Hysteresis Applications: LTC1482CN8#PBF provides the lowest receiver hysteresis specification at 30 mV, compared to the SN75176BP baseline of 50 mV. This characteristic may benefit noise-sensitive applications requiring tighter input threshold margins.

All substitute parts are supplied in identical 8-DIP through-hole packaging and maintain 4.75V ~ 5.25V supply voltage compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SN75176BP with any of the listed parts without circuit modification?

A: Yes. All listed substitute parts maintain identical protocol support (RS422/RS485), duplex mode (half), driver/receiver configuration (1/1), supply voltage range (4.75V ~ 5.25V), and 8-DIP package specifications. Direct pin-for-pin substitution is supported without circuit redesign.

Q: What is the significance of receiver hysteresis variation among substitute parts?

A: Receiver hysteresis determines the input threshold differential for logic state transitions. The SN75176BP specifies 50 mV. Substitute parts range from 30 mV (LTC1482CN8#PBF) to 70 mV (ADM1485ANZ, ADM1485JNZ, ADM485ANZ, ADM485JNZ, LTC485CN8#PBF, MAX485CPA+, MAX485EPA+). Lower hysteresis provides tighter input margins; higher hysteresis provides greater noise immunity. Selection depends on application noise environment and signal integrity requirements.

Q: Are there temperature-related constraints for substitution?

A: The SN75176BP operates within 0°C ~ 70°C. Substitute parts with identical temperature ranges (LTC1485CN8#PBF, ADM1485JNZ, ADM485JNZ, LTC1482CN8#PBF, LTC485CN8#PBF, MAX485CPA+) are direct equivalents for standard industrial applications. Parts with extended ranges (-40°C ~ 85°C: ADM1485ANZ, MAX485EPA+) are suitable for wider environmental conditions but are not required for standard 0°C ~ 70°C applications.

Q: Does data rate specification affect substitution compatibility?

A: Data rate specifications do not prevent functional substitution. The SN75176BP baseline does not specify a data rate limit. Substitute parts with specified data rates (2.5 Mbps to 30 Mbps) are compatible with applications operating at or below their rated speeds. Applications requiring high-speed operation should select ADM1485ANZ or ADM1485JNZ (30 Mbps capability).

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the SN75176BP. Regulatory compliance is maintained across all substitution options.

Q: Which substitute part offers the best inventory availability?

A: MAX485EPA+ provides the highest inventory level at 23,407 units in stock, compared to the SN75176BP baseline of 59,270 units. For applications requiring extended temperature range (-40°C ~ 85°C) with maximum supply assurance, MAX485EPA+ is the recommended selection.

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