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TJA1040T/H/V,118 Application Field and Working Principle

The TJA1040T/H/V is a family of integrated high speed differential transmitters and receivers for automotive applications. This device is designed to provide a cost effective solution for an automotive qualified low power CAN physical layer. The TJA1040T/H/V devices are designed for the physical layer of Controller Area Network (CAN) bus according to ISO 11898-2.

Features of TJA1040T/H/V,118

• High-speed CAN transceiver with data rates up to 1 Mbps
• Three operating modes – fast, advanced and low-power
• Provides high speed, low power, and low EMI in one device
• Operates in the temperature range of −40°C to +125°C
• Integrated 100 kΩ flat passive-filtering network
• Highly robust ESD structure
• Integrated wake-up comparator for sensitive low-power-sleep mode
• Low sleep-mode current consumption (155 µA)
• Lower power management current consumption (44.9 µA)
• Diagnostics and monitoring features
• Configurable bus inversion logic

Application field of TJA1040T/H/V,118

The TJA1040T/H/V CAN transceiver is suitable for automotive applications such as Driving & Comfort controls, Electronic Stability Control, Intelligent Speed Adaptation and Vehicle to Vehicle (V2V) communication. It is also suitable for other application areas such as Telematics, Industrial Automation, and Home Automation.

Working Principle of TJA1040T/H/V,118

The integrated TJA1040T/H/V CAN transceiver is built around high-speed CMOS process technology and is designed for lower power and lower EMI with integrated 100kΩ flat Passive Filtering Network. The device contains a transmitter and a receiver. It provides differential transmit capability and differential receive capability to the CAN bus.

The transmitter has an input pair of data lines that are used to transmit data to the bus, while the receiver receives signals from the bus and delivers them to the system processor. The transceiver is a 3-state device, meaning that it can be enabled or disabled by the system processor. When disabled, the output of the transmitter is a high impedance state, while the output of the receiver is a low voltage state.

The TJA1040T/H/V has a sleep mode that is triggered by a signal on the WAKE_H and WAKE_L pins. When in this mode, the transceiver consumes significantly lower power. The TJA1040T/H/V also features a programmable bus inversion logic that allows for CAN signal inversion to prevent undesirable reflections.

The TJA1040T/H/V CAN transceiver is an important component for any automotive system that uses CAN communication. It enables high speed, low power, and low EMI performance in the same device. This makes it ideal for a wide range of automotive applications.

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