Overview
The TJA1051T/3/1U is a high-speed CAN (Controller Area Network) transceiver produced by NXP USA Inc. This component is designed to provide an interface between a CAN protocol controller and the physical two-wire CAN bus, making it suitable for high-speed CAN applications, particularly in the automotive industry. It belongs to the third generation of high-speed CAN transceivers from NXP Semiconductors, offering significant improvements in ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance compared to earlier generations like the TJA1050.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC supply voltage | 4.5 | 5.5 | V | ||
| VIO supply voltage on pin VIO | 2.8 | 5.5 | V | ||
| Vuvd(VCC) undervoltage detection voltage on pin VCC | 3.5 | 4.5 | V | ||
| Vuvd(VIO) undervoltage detection voltage on pin VIO | 1.3 | 2.0 | 2.7 | V | |
| ICC supply current (Off mode, TJA1051T/E) | 1 | 5 | 8 | μA | |
| ICC supply current (Silent mode) | 0.1 | 1 | 2.5 | mA | |
| ICC supply current (Normal mode, bus recessive) | 2.5 | 5 | 10 | mA | |
| ICC supply current (Normal mode, bus dominant) | 20 | 50 | 70 | mA | |
| VESD electrostatic discharge voltage (IEC 61000-4-2) | at pins CANH and CANL | -8 | +8 | kV | |
| VCANH voltage on pin CANH | -58 | +58 | V | ||
| VCANL voltage on pin CANL | -58 | +58 | V | ||
| Tvj virtual junction temperature | -40 | +150 | °C |
Key Features
- Compliant with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 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).
- Functional behavior predictable under all supply conditions.
- Transceiver disengages from the bus when not powered up (zero load).
- High ElectroStatic Discharge (ESD) handling capability on the bus pins.
- Bus pins protected against transients in automotive environments.
- Transmit Data (TXD) dominant time-out function.
- Undervoltage detection on pins VCC and VIO.
- Thermally protected.
- Supports Normal, Silent, and Off operating modes (Off mode available on TJA1051T/E only).
- Direct interfacing to microcontrollers with supply voltages from 3 V to 5 V.
Applications
The TJA1051T/3/1U is primarily used in high-speed CAN applications within the automotive industry. It is suitable for various automotive systems, including:
- Advanced Driver Assistance Systems (ADAS)
- Highly Automated Driving
- Connectivity and Infotainment systems
- In-Vehicle Electronics (IVE)
- Powertrain and Vehicle Dynamics
Q & A
- What is the TJA1051T/3/1U used for?
The TJA1051T/3/1U is a high-speed CAN transceiver used to provide an interface between a CAN protocol controller and the physical two-wire CAN bus in automotive applications.
- What are the key improvements of the TJA1051 over earlier generations?
The TJA1051 offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance compared to earlier generations like the TJA1050.
- What are the supported operating modes of the TJA1051T/3/1U?
The TJA1051T/3/1U supports Normal, Silent, and Off operating modes (Off mode available on TJA1051T/E only).
- What is the maximum data rate supported by the TJA1051T/3/1U?
The TJA1051T/3/1U supports data rates up to 5 Mbit/s in the CAN FD fast phase.
- Is the TJA1051T/3/1U suitable for 12 V and 24 V systems?
Yes, the TJA1051T/3/1U is suitable for both 12 V and 24 V systems.
- What kind of protection does the TJA1051T/3/1U offer?
The TJA1051T/3/1U offers high ESD handling capability, protection against transients in automotive environments, and thermal protection.
- Can the TJA1051T/3/1U be directly interfaced with microcontrollers of different supply voltages?
Yes, the TJA1051T/3/1U can be directly interfaced with microcontrollers having supply voltages from 3 V to 5 V.
- What are the typical applications of the TJA1051T/3/1U in the automotive industry?
The TJA1051T/3/1U is used in ADAS, Highly Automated Driving, Connectivity, Infotainment, IVE, Powertrain, and Vehicle Dynamics.
- What standards does the TJA1051T/3/1U comply with?
The TJA1051T/3/1U complies with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 standards.
- How does the TJA1051T/3/1U behave when the supply voltage is off?
The transceiver disengages from the bus when not powered up, ensuring zero load on the bus.
