Overview
The TJA1042AT/0Z 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 ideal for high-speed CAN applications, particularly in the automotive industry. The TJA1042 belongs to the third generation of high-speed CAN transceivers, offering significant improvements in ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance compared to earlier generations.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC supply voltage | 4.5 | 5.5 | V | ||
| Vuvd(VCC) undervoltage detection voltage on pin VCC | 3.5 | 4.5 | V | ||
| VIO supply voltage on pin VIO | 2.8 | 5.5 | V | ||
| Vuvd(VIO) undervoltage detection voltage on pin VIO | 1.3 | 2.0 | 2.7 | V | |
| ICC supply current (Standby mode) | VTXD = VCC - 10 | 10 | 15 | μA | |
| ICC supply current (Normal mode, recessive) | VTXD = VIO | 2.5 | 5 | 10 | mA |
| ICC supply current (Normal mode, dominant) | VTXD = 0 V | 20 | 45 | 70 | mA |
| IIO supply current on pin VIO (Standby mode) | VTXD = VIO | 5 | 14 | μA | |
| IIO supply current on pin VIO (Normal mode, recessive) | VTXD = VIO | 15 | 80 | 200 | μA |
| IIO supply current on pin VIO (Normal mode, dominant) | VTXD = 0 V | 350 | 1000 | μA |
Key Features
- High-Speed CAN Transceiver: Designed for high-speed CAN applications, particularly in the automotive industry.
- Improved EMC and ESD Performance: Offers enhanced ElectroMagnetic Compatibility and ElectroStatic Discharge handling compared to earlier generations.
- Standby Mode: Very low-current Standby mode with host and bus wake-up capability.
- Predictable and Fail-Safe Behavior: Functional behavior predictable under all supply conditions; transceiver disengages from the bus when the supply voltage drops below the switch-off undervoltage threshold.
- Undervoltage Detection: Undervoltage detection on pins VCC and VIO.
- Time-Out Functions: Transmit Data (TXD) dominant time-out function and bus-dominant time-out function in Standby mode.
- Environmental Compliance: Dark green product, halogen-free, and RoHS compliant; AEC-Q100 qualified.
- Package Options: Available in various package types, including HVSON8 with improved Automated Optical Inspection (AOI) capability.
Applications
The TJA1042AT/0Z is primarily used in high-speed CAN applications within the automotive industry. It is suitable for various automotive systems that require reliable and high-speed communication over the CAN bus, such as:
- Vehicle control systems
- Infotainment systems
- Safety and security systems
- Advanced driver-assistance systems (ADAS)
Q & A
- What is the primary function of the TJA1042AT/0Z?
The TJA1042AT/0Z is a high-speed CAN transceiver that provides an interface between a CAN protocol controller and the physical two-wire CAN bus.
- What are the key improvements of the TJA1042 over earlier generations?
The TJA1042 offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance, as well as enhanced quiescent current performance.
- What is the operating voltage range for the VCC supply?
The VCC supply voltage range is from 4.5 V to 5.5 V.
- What is the purpose of the Standby mode in the TJA1042?
The Standby mode reduces the current consumption significantly, with host and bus wake-up capability, making it energy-efficient during periods of inactivity.
- Does the TJA1042 have undervoltage detection?
Yes, the TJA1042 has undervoltage detection on pins VCC and VIO.
- Is the TJA1042 environmentally compliant?
Yes, the TJA1042 is a dark green product, halogen-free, and RoHS compliant; it is also AEC-Q100 qualified.
- What are the typical applications of the TJA1042?
The TJA1042 is used in various automotive systems that require high-speed CAN communication, such as vehicle control systems, infotainment systems, safety and security systems, and ADAS.
- What package options are available for the TJA1042?
The TJA1042 is available in various package types, including HVSON8 with improved Automated Optical Inspection (AOI) capability.
- How does the TJA1042 handle ESD and EMC?
The TJA1042 has high ESD handling capability on the bus pins (±8 kV) and improved EMC performance.
- What is the recommended thermal management for the TJA1042?
For enhanced thermal and electrical performance, it is recommended that the exposed center pad also be soldered to board ground.
