Overview
The TJA1042T,112, produced by NXP USA Inc., is a high-speed CAN (Controller Area Network) transceiver designed to interface between a CAN protocol controller and the physical two-wire CAN bus. This component is part of the third generation of high-speed CAN transceivers from NXP, offering significant improvements in ElectroMagnetic Compatibility (EMC), ElectroStatic Discharge (ESD) performance, and quiescent current compared to earlier models like the TJA1040.
The TJA1042T is compliant with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 standards, supporting data rates up to 5 Mbit/s in the CAN FD fast phase. It is suitable for use in 12 V and 24 V systems, making it an excellent choice for various high-speed CAN (HS-CAN) network applications, particularly in the automotive industry.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | - | 4.5 | - | 5.5 | V |
| IO Voltage (VIO) | - | 2.8 | - | 5.5 | V |
| Standby Mode Current | VSTB = VIO | - | - | 10 | μA |
| High-Level Input Voltage (VIH) on STB Pin | - | 0.7VIO | - | VIO + 0.3 | V |
| Low-Level Input Voltage (VIL) on STB Pin | - | -0.3 | - | 0.3VIO | V |
| Dominant Output Voltage on CANH Pin | VTXD = 0 V | 2.75 | 3.5 | 4.5 | V |
| Dominant Output Voltage on CANL Pin | VTXD = 0 V | 0.5 | 1.5 | 2.25 | V |
| Propagation Delay | - | - | - | 250 | ns |
Key Features
- Fully compliant with ISO 11898-2:2016, SAE J2284-1 to SAE J2284-5, and SAE J1939-14 standards.
- Supports data rates up to 5 Mbit/s in the CAN FD fast phase.
- Suitable for 12 V and 24 V systems.
- Low Electromagnetic Emission (EME) and high Electromagnetic Immunity (EMI) according to proposed EMC standards.
- Variants with a VIO pin allow direct interfacing with microcontrollers having supply voltages from 3.3 V to 5 V.
- Shorter propagation delay on TJA1042B and TJA1042C variants supports larger network topologies.
- SPLIT voltage output on TJA1042T and TJA1042CT for stabilizing the recessive bus level.
- Available in SO8 and leadless HVSON8 (3.0 mm × 3.0 mm) packages with improved Automated Optical Inspection (AOI) capability.
- Very low-current Standby mode with host and bus wake-up capability.
- High ESD handling capability on the bus pins (±8 kV).
- AEC-Q100 qualified and RoHS compliant.
Applications
The TJA1042T is primarily used in high-speed CAN (HS-CAN) networks within the automotive industry. It is suitable for various applications that require reliable communication at high data rates, such as:
- Automotive control systems.
- Vehicle networking.
- Industrial automation.
- Embedded systems requiring low-power modes with wake-up capability.
Q & A
- What is the primary function of the TJA1042T?
The TJA1042T is a high-speed CAN transceiver that provides an interface between a CAN protocol controller and the physical two-wire CAN bus.
- What standards is the TJA1042T compliant with?
The TJA1042T is compliant with ISO 11898-2:2016, SAE J2284-1 to SAE J2284-5, and SAE J1939-14 standards.
- What are the supported data rates for the TJA1042T?
The TJA1042T supports data rates up to 5 Mbit/s in the CAN FD fast phase.
- What are the supply voltage ranges for the TJA1042T?
The supply voltage (VCC) range is 4.5 V to 5.5 V, and the IO voltage (VIO) range is 2.8 V to 5.5 V.
- What is the purpose of the VIO pin in the TJA1042T?
The VIO pin allows for direct interfacing with microcontrollers having supply voltages from 3.3 V to 5 V.
- What is the Standby mode current of the TJA1042T?
The Standby mode current is typically around 10 μA.
- What is the ESD handling capability of the TJA1042T?
The TJA1042T has a high ESD handling capability on the bus pins of ±8 kV.
- What packages are available for the TJA1042T?
The TJA1042T is available in SO8 and leadless HVSON8 (3.0 mm × 3.0 mm) packages.
- Is the TJA1042T AEC-Q100 qualified and RoHS compliant?
Yes, the TJA1042T is AEC-Q100 qualified and RoHS compliant.
- What is the purpose of the SPLIT voltage output in the TJA1042T?
The SPLIT voltage output is used for stabilizing the recessive bus level.
