NXP Semiconductors

TJA1042 - High-Speed CAN Transceiver with Standby | NXP

Name: TJA1042
Brand: NXP Semiconductors
Price: 0.75 USD
Availability: InStock

MPN: TJA1042 ✓ Active

In Stock Ships in 1-3 business days

4.5 V to 5.5 V Vdss 10 uA (typical) Id SO-8 (SOT96-1) Package

From $0.75 USD / Unit

MOQ: 1 |

Price updated: 2026-08-25

Volume Pricing

Qty	Unit Price	Extended
1	$1.25	$1.25
10	$1.1	$11.00
100	$0.95	$95.00
500	$0.85	$425.00
1,000	$0.75	$750.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for TJA1042 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

TJA1051T/3/1

✅ Drop-In

NXP Semiconductors

📦 SO-8

CAN · 1/1 · Half · 4.5V to 5.5V · Up to 1 Mbit/s (CAN FD capable) · 3V to 5V (for direct MCU interface) · 8-SO (SOIC-8) · -40C to +150C (AEC-Q100 Grade 1)

✓ In Stock

$0.42 / Unit

View Datasheet →

TJA1042T/3/1J

✅ Drop-In

📦 SO-8

Same die, different ordering code

📋 Reference alternative (not in catalog)

TJA1042BTK

✅ Drop-In

📦 SO-8

Shorter propagation delay, supports larger topologies

📋 Reference alternative (not in catalog)

TCAN1042VDRQ1

✅ Drop-In

Texas Instruments

📦 SO-8

1 · CANbus · 4.5 V to 5.5 V · 5 Mbps (CAN FD) · -55°C to 125°C · 8-SOIC (D) · Surface Mount · Yes (VIO pin)

✓ In Stock

$0.34 / Unit

View Datasheet →

TJA1044T/3

✅ Drop-In

📦 SO-8

Optimized for 24V applications, different EMC behavior

📋 Reference alternative (not in catalog)

TLE9251V

✅ Drop-In

📦 SO-8

Cross-brand, similar CAN FD transceiver, pin-compatible

📋 Reference alternative (not in catalog)

TJA1042 Maximum Ratings & Electrical Characteristics

Protocol	CAN 2.0, CAN FD
Number of Drivers	1
Number of Receivers	1
Duplex	Half
Data Rate	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	SO-8 (SOT96-1)
Mounting Type	Surface Mount
ESD Protection	±8 kV HBM (bus pins)
Bus Pin Voltage	-27 V to +40 V
Propagation Delay	110 ns (typical)
RoHS Status	Compliant
AEC-Q100	Qualified

TJA1042 Pin Configuration

Pin 1	TXD — Transmit data input
Pin 2	GND — Ground
Pin 3	VCC — Supply voltage
Pin 4	RXD — Receive data output
Pin 5	SPLIT — Split pin for bus stabilization
Pin 6	CANL — Low-level CAN bus line
Pin 7	CANH — High-level CAN bus line
Pin 8	STB — 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 Module, Industrial Automation, Gateway Module, Engine Control Unit (ECU), Battery Management System (BMS), Electric Power Steering (EPS).

🚗

Automotive Body Control Module

The TJA1042 provides reliable CAN communication in body control modules, handling door locks, lighting, and window controls. Its standby mode reduces battery drain when the vehicle is off, and its AEC-Q100 qualification ensures reliability in harsh automotive environments. The 5 Mbit/s CAN FD capability supports high-bandwidth data exchange between modules.

Recommended

🏭

Industrial Automation

In industrial automation, the TJA1042 enables robust CAN communication between PLCs, sensors, and actuators. Its high ESD protection (±8 kV HBM) and wide operating temperature range (-40C to +150C) make it suitable for factory floor environments. The standby mode helps reduce power consumption in energy-efficient systems.

Recommended

STM32F030C8T6 · STMicroelectronics TJA1051T/3/1 · NXP Semiconductors

🌐

Gateway Module

The TJA1042 is ideal for gateway modules that route CAN traffic between different networks. Its support for CAN FD at 5 Mbit/s allows high-speed data transfer between domains, while the standby mode enables low-power operation when the vehicle is idle. The SPLIT pin helps stabilize the bus in complex topologies.

Recommended

S32K344 · NXP Semiconductors TJA1051T/3/1 · NXP Semiconductors

🚗

Engine Control Unit (ECU)

The TJA1042 is used in ECUs to communicate with other vehicle systems. Its high-speed CAN FD capability supports real-time data exchange for engine management, and its robust EMC performance ensures reliable operation in the electrically noisy engine compartment. The device's thermal shutdown protection adds an extra layer of safety.

Recommended

MPC5777C · NXP Semiconductors TJA1051T/3/1 · NXP Semiconductors

⚡

Battery Management System (BMS)

In BMS applications, the TJA1042 provides reliable CAN communication between battery cells and the main controller. Its low standby current is crucial for minimizing power draw when the vehicle is off, and its wide temperature range supports operation in thermal extremes. The device's ESD protection safeguards against static discharge during assembly and maintenance.

Recommended

BQ76952 · Texas Instruments TJA1051T/3/1 · NXP Semiconductors

🚗

Electric Power Steering (EPS)

The TJA1042 is used in EPS systems to transmit steering angle and torque data between sensors and the control unit. Its high-speed CAN FD capability ensures low-latency communication, critical for real-time control. The device's AEC-Q100 qualification and robust EMC performance make it suitable for the demanding automotive environment.

Recommended

S32K146 · NXP Semiconductors TJA1051T/3/1 · NXP Semiconductors

Recommended Products Summary

S32K146 NXP Semiconductors Used in: Automotive Body Control Module, Electric Power Steering (EPS) TJA1051T/3/1 NXP Semiconductors Used in: Automotive Body Control Module, Industrial Automation, Gateway Module, Engine Control Unit (ECU), Battery Management System (BMS), Electric Power Steering (EPS) STM32F030C8T6 STMicroelectronics Used in: Industrial Automation S32K344 NXP Semiconductors Used in: Gateway Module MPC5777C NXP Semiconductors Used in: Engine Control Unit (ECU) BQ76952 Texas Instruments Used in: Battery Management System (BMS)

What is the TJA1042?

The TJA1042 is a high-speed CAN transceiver from NXP Semiconductors that interfaces a CAN protocol controller to the physical two-wire CAN bus. It supports CAN FD with data rates up to 5 Mbit/s and includes a standby mode for low power consumption. According to the NXP datasheet, it is designed for automotive and industrial applications.

What is the maximum data rate of TJA1042?

The TJA1042 supports CAN FD fast phase data rates up to 5 Mbit/s, as stated in the NXP product information. This enables high-speed communication in modern automotive networks while maintaining backward compatibility with classic CAN at lower speeds.

What is the difference between TJA1042 and TJA1044?

The TJA1042 and TJA1044 are both high-speed CAN transceivers from NXP, but the TJA1044 is optimized for 24V applications and has different EMC performance. According to NXP Community discussions, the TJA1044 may have improved EMC characteristics for 24V systems, while the TJA1042 is more common in 12V automotive environments.

Can TJA1042 be used in CAN FD networks?

Yes, the TJA1042 is fully CAN FD capable, supporting data rates up to 5 Mbit/s in the fast phase. It meets ISO 11898-2:2016 and SAE J2284-1 to J2284-5 standards, ensuring reliable communication in CAN FD networks.

What is the standby current of TJA1042?

The TJA1042 has a typical standby current of 10 uA, making it suitable for battery-powered and always-on applications. This low quiescent current helps extend battery life in automotive modules that need to remain partially active.

What is the operating voltage range of TJA1042?

The TJA1042 operates with a supply voltage (VCC) from 4.5V to 5.5V. This standard 5V supply range is typical for CAN transceivers and ensures compatibility with most CAN controllers.

Is TJA1042 AEC-Q100 qualified?

Yes, the TJA1042 is AEC-Q100 qualified, making it suitable for automotive applications. This qualification ensures the device meets stringent reliability and quality standards required for automotive electronics.

What is the package of TJA1042?

The TJA1042 is available in an 8-pin SO (SOIC) package, specifically the SOT96-1. This small outline package is widely used in automotive and industrial applications and is easy to solder on standard PCBs.

Where can I buy TJA1042?

The TJA1042 is available from major distributors such as DigiKey and Mouser. For example, DigiKey lists the TJA1042T/3,118 in stock. As of 2026-08-25, pricing starts at around $1.25 per unit for small quantities.

What is the price of TJA1042?

As of 2026-08-25, the TJA1042 is priced at approximately $1.25 for single-unit quantities, decreasing to $0.75 at 1000 units. Prices may vary by distributor and quantity, so it's best to check current listings on DigiKey or Mouser.

What is the lead time for TJA1042?

The lead time for TJA1042 is typically 2-4 weeks from major distributors, but it can vary based on stock levels and demand. As of 2026-08-25, DigiKey shows the part as 'ships today' for immediate orders, indicating good availability.

Is TJA1042 in stock?

Yes, the TJA1042 is currently in stock at major distributors like DigiKey and Mouser. As of 2026-08-25, DigiKey lists the TJA1042T/3,118 as available for immediate shipment.

What is the best drop-in replacement for TJA1042?

The best drop-in replacement for TJA1042 is the TJA1051T/3/1 from NXP, which is pin-compatible and offers similar performance with improved EMC. Other options include the TCAN1042VDRQ1 from Texas Instruments, which is also pin-compatible and AEC-Q100 qualified.

Can TCAN1042 replace TJA1042?

Yes, the TCAN1042 from Texas Instruments can replace the TJA1042 in most applications. According to TI E2E forums, the TCAN1042H is a suitable replacement, with minor differences in undervoltage detection thresholds and VIO levels that are unlikely to cause issues in typical designs.

What are the key specifications of TJA1042 that engineers should know?

The TJA1042 is a high-speed CAN transceiver supporting CAN FD up to 5 Mbit/s. It operates from 4.5V to 5.5V, has a standby current of 10 uA, and is AEC-Q100 qualified. It comes in an SO-8 package and provides ESD protection of ±8 kV HBM on bus pins. These specs make it ideal for automotive and industrial CAN networks.

Engineering reference data for TJA1042 — comparison, design guidance, and compliance information.

Selection Guide

Choose the TJA1042 when you need a reliable, AEC-Q100 qualified CAN transceiver for standard 12V automotive or industrial applications. It offers a good balance of performance, low standby current, and proven reliability. If you require even lower standby current, consider the TCAN1042VDRQ1 from Texas Instruments. For improved EMC performance, the TJA1051T/3/1 is a drop-in alternative with better electromagnetic emission characteristics. If your application operates on 24V systems, the TJA1044T/3 may be more suitable. All alternatives are pin-compatible in the SO-8 package, allowing easy PCB redesign.

Comparison with Alternatives

Parameter	This Product	TJA1051T/3/1	TCAN1042VDRQ1	TJA1044T/3
Package	SO-8	SO-8	SO-8	SO-8
Brand	NXP Semiconductors	NXP Semiconductors	Texas Instruments	NXP Semiconductors
Data Rate	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	5 uA	10 uA
AEC-Q100	Qualified	Qualified	Qualified	Qualified
ESD Protection	±8 kV HBM	±8 kV HBM	±8 kV HBM	±8 kV HBM
Supply Voltage	4.5V to 5.5V	4.5V to 5.5V	4.5V to 5.5V	4.5V to 5.5V
Operating Temperature	-40C to +150C	-40C to +150C	-40C to +150C	-40C to +150C

Key Differentiators

Low standby current of 10 uA (vs TCAN1042VDRQ1)
SPLIT pin for bus stabilization (vs TCAN1042VDRQ1)
Proven NXP third-generation CAN transceiver (vs TJA1044T/3)

Design Notes

Place the TJA1042 close to the CAN bus connector to minimize stub length. Use a 120-ohm termination resistor at each end of the bus. Keep the CANH and CANL traces parallel and close together to reduce EMI. A ground plane under the device is recommended for thermal and EMC performance.

Decouple the VCC pin with a 100 nF ceramic capacitor placed as close as possible to the pin. For noisy environments, add a 10 uF electrolytic capacitor in parallel. Ensure the supply voltage stays within 4.5V to 5.5V to avoid undervoltage lockout.

Do not leave the STB pin floating; tie it to a defined logic level to avoid unintended standby mode. The SPLIT pin can be left unconnected if not used, but connecting it to a capacitor can improve bus stability. Ensure the TXD pin is not driven low when the transceiver is in standby mode.