TJA1042 - High-Speed CAN Transceiver with Standby | NXP
MPN: TJA1042 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.75 | $750.00 |
Drop-in alternatives for TJA1042 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TJA1051T/3/1
β Drop-Inβ In Stock
$0.22 / Unit
View Datasheet βTJA1044T/3
β Drop-Inπ Reference alternative (not in catalog)
TCAN1042VDRQ1
β Drop-Inβ In Stock
$0.4308 / Unit
View Datasheet βTCAN1044A-Q1
β Drop-Inπ Reference alternative (not in catalog)
NCV7342D13R2G
β Drop-Inπ Reference alternative (not in catalog)
TLE9251V
β Drop-Inπ Reference alternative (not in catalog)
TJA1042 Maximum Ratings & Electrical Characteristics
| Protocol | CAN 2.0, CAN FD |
| Data Rate | Up to 5 Mbit/s (CAN FD fast phase) |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Standby Current | 10 uA (typical) |
| Operating Temperature | -40C to +150C |
| Package | SOIC-8 |
| Mounting Type | Surface Mount |
| ESD Protection | Β±8 kV (HBM) on bus pins |
| Bus Pin Voltage | -27 V to +40 V |
| Undervoltage Detection | Yes (on VCC) |
| Standby Mode | Yes (with bus wake-up) |
| SPLIT Pin | Yes |
| Thermal Shutdown | Yes |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified |
TJA1042 Pin Configuration
| Pin 1 | TXD β Transmit data input |
| Pin 2 | GND β Ground |
| Pin 3 | VCC β Supply voltage |
| Pin 4 | RXD β Receive data output |
| Pin 5 | SPLIT β Split pin for bus stabilization |
| Pin 6 | CANL β Low-level CAN bus line |
| Pin 7 | CANH β High-level CAN bus line |
| Pin 8 | STB β Standby control input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TJA1042 is suitable for 6 applications: Automotive Body Control Modules, Gateway Modules, Engine Control Units, Industrial Automation, Battery Management Systems, Electric Vehicle Charging Stations.
Automotive Body Control Modules
The TJA1042 is ideal for automotive body control modules (BCMs) that manage lighting, windows, and locks. Its low standby current of 10 uA helps reduce battery drain when the vehicle is off, while the bus wake-up capability allows the BCM to wake on CAN activity. The transceiver's robust ESD protection (Β±8 kV HBM) and wide operating temperature range (-40C to +150C) ensure reliable operation in harsh automotive environments. The SPLIT pin can be used to stabilize the recessive bus level in long wiring harnesses, improving signal integrity.
Recommended
Gateway Modules
In automotive gateway modules, the TJA1042 provides reliable CAN communication between different network domains. Its support for CAN FD up to 5 Mbit/s enables high-bandwidth data transfer for advanced driver-assistance systems (ADAS) and infotainment. The transceiver's high EMC immunity ensures error-free communication in the electrically noisy environment of a vehicle. The standby mode allows the gateway to remain partially powered while monitoring for wake-up events, reducing overall system power consumption.
Recommended
Engine Control Units
The TJA1042 is well-suited for engine control units (ECUs) that require robust CAN communication in high-temperature and high-vibration environments. Its operating temperature range of -40C to +150C exceeds the typical automotive requirement, ensuring reliable performance under the hood. The transceiver's high DC handling capability on the bus pins provides flexibility in network topologies with multiple nodes. The undervoltage detection on VCC helps protect the ECU from power supply fluctuations.
Recommended
Industrial Automation
In industrial automation, the TJA1042 enables reliable CAN communication between PLCs, sensors, and actuators. Its high EMC immunity and ESD protection make it suitable for factory floors with heavy electrical noise. The standby mode is beneficial for energy-efficient systems that need to wake on CAN activity. The SPLIT pin can be used to improve signal integrity on long bus lines, which is common in industrial installations. The transceiver's wide supply voltage range (4.5V to 5.5V) accommodates various industrial power rails.
Recommended
Battery Management Systems
The TJA1042 is used in battery management systems (BMS) for electric vehicles and energy storage systems. Its low standby current is critical for minimizing battery drain when the system is idle. The bus wake-up capability allows the BMS to wake from sleep when a charging station or vehicle controller sends a CAN message. The transceiver's robust ESD protection and wide temperature range ensure reliable operation in the demanding environment of battery packs. The SPLIT pin can help stabilize the bus in large battery systems with long wiring.
Recommended
Electric Vehicle Charging Stations
The TJA1042 is suitable for electric vehicle (EV) charging stations that use CAN communication for control and monitoring. Its support for CAN FD enables high-speed data exchange between the charger and the vehicle's battery management system. The transceiver's high EMC immunity ensures reliable communication in the presence of high-power switching noise. The standby mode allows the charger to remain in a low-power state while waiting for a vehicle to connect, reducing energy consumption when idle.
Recommended
Recommended Products Summary
Engineering reference data for TJA1042 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1051T/3/1 | TJA1044T/3 | TCAN1042VDRQ1 | TCAN1044A-Q1 | NCV7342D13R2G | TLE9251V |
|---|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments | onsemi | Infineon |
| Data Rate | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) | 5 Mbit/s (CAN FD) |
| Standby Current | 10 uA | 10 uA | 10 uA | 10 uA | 10 uA | 10 uA | 10 uA |
| SPLIT Pin | Yes | No | No | No | No | No | No |
| VIO Pin | No | Yes | No | No | No | No | No |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Price (1000 pcs) | $0.75 | $0.80 | $0.78 | $0.85 | $0.82 | $0.88 | $0.90 |
Key Differentiators
- SPLIT pin for bus stabilization (vs TJA1051T/3/1)
- Lower standby current (vs TCAN1042VDRQ1)
- Wider operating temperature range (vs NCV7342D13R2G)
Design Notes
Place the TJA1042 as close as possible to the CAN bus connector to minimize stub length. Use a 120-ohm termination resistor at each end of the bus. For the SPLIT pin, connect a 60-ohm resistor to ground to stabilize the recessive bus level in networks with long bus lines. Ensure proper decoupling with a 100nF capacitor close to the VCC pin.
The TJA1042 has thermal shutdown protection, but it is important to ensure adequate PCB copper area for heat dissipation, especially in high-temperature automotive environments. The SOIC-8 package has a thermal resistance of approximately 150 C/W. For continuous operation at high bus loads, consider adding thermal vias to the ground plane.
Do not connect the SPLIT pin directly to ground without a resistor, as this can cause excessive current draw. Ensure the STB pin is properly controlled to enter standby mode; leaving it floating can cause unpredictable behavior. Also, verify that the microcontroller's TXD and RXD pins are compatible with the transceiver's logic levels, especially if using a VIO variant.
Compliance Information
AEC-Q100 qualified per NXP product page. RoHS compliant. Halogen-free status not specified in provided data.
