Overview
The TJA1052IT/2518 is a galvanically isolated high-speed CAN (Controller Area Network) transceiver produced by NXP USA Inc. This component is part of the third generation of high-speed CAN transceivers from NXP, offering significant improvements over earlier generations. It is specifically designed for use in automotive and industrial applications, particularly in Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV), where galvanic isolation is crucial for safety and signal integrity.
The TJA1052IT/2518 integrates both the isolator and the transceiver into a single SO16 package, reducing board space and enhancing reliability. It implements the CAN physical layer as defined in ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5, supporting data rates up to 5 Mbit/s in the CAN FD fast phase.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SO16 plastic small outline package; 16 leads; body width 7.5 mm (SOT162-1) |
| Rated Insulation Voltage | Up to 5 kV (RMS) depending on the version (TJA1052IT/5, TJA1052IT/2, TJA1052IT/1) |
| Supply Voltage Range | 4.5 V to 5.5 V for VDD1 and VDD2 |
| Data Rate | Up to 5 Mbit/s in the CAN FD fast phase |
| ElectroMagnetic Compatibility (EMC) | Improved EMC performance |
| ElectroStatic Discharge (ESD) Performance | Improved ESD performance |
| Loop Delay | Maximum loop delay < 220 ns |
| Electrical Transient Immunity | 45 kV/μs (typical) |
| AEC-Q100 Qualification | AEC-Q100 qualified |
| Compatibility | Suitable for use in 12 V and 24 V systems; compatible with 3 V to 5 V microcontrollers |
Key Features
- Galvanic isolation using proprietary capacitive isolation technology, enhancing signal integrity in noisy environments
- Integrated isolator and transceiver in a single package, reducing board space and improving reliability
- Compliance with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 standards
- Support for data rates up to 5 Mbit/s in the CAN FD fast phase
- Improved EMC and ESD performance
- Ideal passive behavior to the CAN bus when the transceiver supply voltage is off
- Suitable for use in 12 V and 24 V systems and compatible with 3 V to 5 V microcontrollers
Applications
The TJA1052IT/2518 is an excellent choice for various automotive and industrial CAN networks where isolation is required for safety reasons or to enhance signal integrity in noisy environments.
- Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV) for applications such as Li-ion battery management, regenerative braking, and 48 V-to-12 V level shifting
- Isolation of high-voltage on-demand pumps and motors in belt elimination projects
- Use in HS-CAN networks that support remote bus wake-up, with proper power-down sequence management
Q & A
- What is the primary function of the TJA1052IT/2518?
The TJA1052IT/2518 is a galvanically isolated high-speed CAN transceiver that provides an interface between a CAN protocol controller and the physical two-wire CAN bus, ensuring safety and signal integrity in noisy environments.
- What are the key benefits of galvanic isolation in the TJA1052IT/2518?
Galvanic isolation protects humans from electric shock, prevents electronics damage from high voltages, and enhances signal integrity in noisy environments.
- What standards does the TJA1052IT/2518 comply with?
The TJA1052IT/2518 complies with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 standards.
- What is the maximum data rate supported by the TJA1052IT/2518?
The TJA1052IT/2518 supports data rates up to 5 Mbit/s in the CAN FD fast phase.
- What is the significance of the SO16 package in the TJA1052IT/2518?
The SO16 package integrates both the isolator and the transceiver, reducing board space and improving reliability.
- What are the typical applications of the TJA1052IT/2518?
Typical applications include Electric Vehicles (EV), Hybrid Electric Vehicles (HEV), Li-ion battery management, regenerative braking, and 48 V-to-12 V level shifting.
- How does the TJA1052IT/2518 handle power-down sequences in HS-CAN networks?
In HS-CAN networks that support remote bus wake-up, the power-down sequence of the supplies must be managed properly to avoid a dominant pulse on the CAN bus.
- What is the electrical transient immunity of the TJA1052IT/2518?
The electrical transient immunity is 45 kV/μs (typical).
- Is the TJA1052IT/2518 AEC-Q100 qualified?
Yes, the TJA1052IT/2518 is AEC-Q100 qualified.
- What is the compatibility of the TJA1052IT/2518 with different voltage systems?
The TJA1052IT/2518 is suitable for use in 12 V and 24 V systems and is compatible with 3 V to 5 V microcontrollers.
- How does the TJA1052IT/2518 behave when the transceiver supply voltage is off?
The TJA1052IT/2518 features ideal passive behavior to the CAN bus when the transceiver supply voltage is off.
