SN75LBC031DR Equivalent & Substitute Parts

Part Overview

The SN75LBC031DR is a half-duplex CANbus transceiver manufactured by Texas Instruments in an 8-SOIC surface mount package. This component functions as a single driver/receiver interface for CANbus protocol applications. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary for design continuity, long-term supply chain planning, and new production runs where the original part may become unavailable.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75LBC031DR
Manufacturer	Texas Instruments
Category	Interface
Type	Transceiver
Protocol	CANbus
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	180 mV
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the SN75LBC031DR is determined by the following critical parameters:

Protocol Compatibility: All substitutes must support CANbus half-duplex operation with 1/1 driver/receiver configuration
Package Compatibility: All substitutes must use 8-SOIC (0.154", 3.90mm Width) surface mount package
Voltage Supply Range: All substitutes must operate within 4.5V ~ 5.5V supply voltage
Electrical Interface: Receiver hysteresis, data rate capability, and operating temperature range determine functional equivalence and upgrade suitability

The substitute parts identified are grouped into two categories:

MFR Recommended Substitute: TCAN1044ADRQ1 (Texas Instruments) — Direct functional replacement with enhanced specifications and active product status.

Upgrade Substitutes: L9615D013TR, L9616, L9616-TR (STMicroelectronics) — Alternative CANbus transceivers with compatible electrical and mechanical parameters.

Parameter Comparison

Parameter	SN75LBC031DR	TCAN1044ADRQ1	L9615D013TR	L9616	L9616-TR
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics
Protocol	CANbus	CANbus	CANbus	CANbus	CANbus
Drivers/Receivers	1/1	1/1	1/1	1/1	1/1
Duplex	Half	Half	Half	Half	Half
Receiver Hysteresis	180 mV	115 mV	150 mV	150 mV	150 mV
Data Rate	—	8 Mbps	500 kBd	—	—
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 150°C (TJ)	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TCAN1044ADRQ1 is the manufacturer-recommended substitute. This Texas Instruments part maintains the same supply voltage range and package footprint as the SN75LBC031DR while offering extended operating temperature range (-40°C ~ 150°C) and higher data rate capability (8 Mbps). The part holds active product status with AEC-Q100 automotive qualification, ensuring long-term availability and supply chain stability.

L9615D013TR, L9616, and L9616-TR are upgrade alternatives from STMicroelectronics. These parts provide equivalent CANbus half-duplex transceiver functionality with compatible 8-SOIC packaging and 4.5V ~ 5.5V supply voltage. The STMicroelectronics options offer extended operating temperature ranges (110°C to 125°C) compared to the original part. All substitute parts maintain ROHS3 compliance and REACH unaffected status.

Selection between substitute options depends on application-specific temperature requirements, data rate demands, and supply chain preferences. All identified substitutes are electrically and mechanically compatible with the SN75LBC031DR within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can TCAN1044ADRQ1 directly replace SN75LBC031DR in existing designs?

A: Yes. Both parts share identical supply voltage range (4.5V ~ 5.5V), 8-SOIC package footprint, and CANbus half-duplex 1/1 transceiver configuration. Pin-to-pin compatibility and electrical interface characteristics support direct substitution.

Q: What is the difference between receiver hysteresis values across substitute parts?

A: Receiver hysteresis affects input threshold switching behavior. The SN75LBC031DR specifies 180 mV hysteresis, while TCAN1044ADRQ1 specifies 115 mV, and STMicroelectronics parts specify 150 mV. These variations remain within acceptable CANbus transceiver operating margins for standard applications.

Q: Are the STMicroelectronics substitutes (L9615D013TR, L9616, L9616-TR) interchangeable with each other?

A: L9616 and L9616-TR are functionally equivalent; the difference is packaging format (Tube versus Cut Tape & Digi-Reel). L9615D013TR is a separate product line with different data rate specification (500 kBd). All three are compatible with SN75LBC031DR electrical and mechanical requirements.

Q: Why does TCAN1044ADRQ1 have a higher operating temperature range than the original part?

A: TCAN1044ADRQ1 is specified for automotive applications with AEC-Q100 qualification, requiring extended temperature performance (-40°C ~ 150°C junction temperature). This represents an upgrade in thermal capability while maintaining backward compatibility.

Q: What packaging options are available for substitutes?

A: TCAN1044ADRQ1 is supplied in Cut Tape (CT) & Digi-Reel format. L9615D013TR is supplied in Cut Tape (CT) & Digi-Reel format. L9616 is supplied in Tube packaging. L9616-TR is supplied in Cut Tape (CT) & Digi-Reel format. All maintain the same 8-SOIC component package.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (TCAN1044ADRQ1, L9615D013TR, L9616, L9616-TR) are ROHS3 compliant and REACH unaffected, matching the compliance status of SN75LBC031DR.

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