TJA1049T,112 Equivalent & Substitute Parts

Part Overview

The TJA1049T,112 is a 1/1 half-duplex CANbus transceiver manufactured by NXP Semiconductors in an 8-SO surface mount package. This component interfaces between a CAN controller and the physical CAN bus, providing signal conditioning and electrical isolation for automotive and industrial applications.

The TJA1049T,112 is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product maintenance and production requirements.

Substiute Parts

TJA1049T,112

NXP SemiconductorsIn Stock: 890TJA1049T,112 Datasheet

Current PartRFQ

SN65HVDA1040AQDRQ1

Texas InstrumentsIn Stock: 69146SN65HVDA1040AQDRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TJA1049T,112 is determined by the following critical parameters:

• Protocol Compatibility: CANbus transceiver functionality
• Electrical Configuration: 1/1 driver/receiver, half-duplex operation
• Data Rate: 1 Mbps maximum
• Supply Voltage Range: 4.75V ~ 5.25V
• Package Compatibility: 8-SOIC surface mount package with matching pinout
• Environmental Compliance: RoHS3 compliance and MSL rating

The SN65HVDA1040AQDRQ1 from Texas Instruments meets all substitution criteria within these parameters. Both parts operate at identical supply voltage ranges, support 1 Mbps CANbus communication, and are housed in mechanically compatible 8-SOIC packages suitable for direct PCB replacement.

Parameter Comparison

Engineering Selection Recommendations

The SN65HVDA1040AQDRQ1 is a direct functional substitute for the obsolete TJA1049T,112. Both components share identical electrical specifications for supply voltage, data rate, and CANbus protocol implementation. The substitute part is currently in active production status, ensuring long-term availability and supply chain stability.

The SN65HVDA1040AQDRQ1 carries automotive-grade qualification (AEC-Q100) and is suitable for applications requiring enhanced reliability standards. The maximum operating temperature of the substitute is 125°C compared to 150°C for the original part; this difference must be evaluated against specific application thermal requirements.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, supporting equivalent environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN65HVDA1040AQDRQ1 replace the TJA1049T,112 in existing designs?

A: Yes. Both parts are 1/1 half-duplex CANbus transceivers with identical supply voltage ranges (4.75V ~ 5.25V), data rates (1 Mbps), and 8-SOIC package dimensions. Direct PCB substitution is supported without circuit modification.

Q: What is the difference in receiver hysteresis between these parts?

A: The TJA1049T,112 specifies 300 mV receiver hysteresis, while the SN65HVDA1040AQDRQ1 specifies 125 mV. Both values fall within standard CANbus transceiver specifications and support reliable signal detection in typical automotive and industrial CAN networks.

Q: Are there temperature rating differences?

A: The TJA1049T,112 operates to 150°C maximum, while the SN65HVDA1040AQDRQ1 operates to 125°C maximum. Applications requiring operation above 125°C must retain the original part or identify alternative solutions.

Q: Does the substitute part require design changes?

A: No design changes are required. The SN65HVDA1040AQDRQ1 maintains pin-compatible 8-SOIC packaging and identical electrical interface specifications. The part functions as a direct replacement in existing PCB layouts.

Q: What is the compliance status of the substitute part?

A: The SN65HVDA1040AQDRQ1 is ROHS3 compliant, REACH unaffected, and carries AEC-Q100 automotive qualification. It meets the same regulatory requirements as the original part and supports automotive and industrial applications.