Overview
The TJA1049T,112 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 TJA1049T,112 is part of the third generation of high-speed CAN transceivers from NXP, 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 | 4.75 | 5.25 | V | ||
| ICC supply current (Standby mode) | 10 | 15 | μA | ||
| ICC supply current (Normal mode, bus recessive) | 2.5 | 5 | 7.5 | mA | |
| ICC supply current (Normal mode, bus dominant) | 20 | 45 | 65 | mA | |
| VESD electrostatic discharge voltage | IEC 61000-4-2 at pins CANH and CANL | -8 | +8 | kV | |
| VCANH voltage on pin CANH | No time limit; DC limiting value | -58 | +58 | V | |
| VCANL voltage on pin CANL | No time limit; DC limiting value | -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).
- Very low-current Standby mode with host and bus wake-up capability.
- High ESD handling capability on the bus pins.
- Bus pins protected against transients in automotive environments.
- Transmit Data (TXD) dominant time-out function and bus-dominant time-out function in Standby mode.
- Undervoltage detection on pin VCC.
- Thermally protected output drivers.
- Ideal passive behavior to the CAN bus when the supply voltage is off.
Applications
The TJA1049T,112 is primarily used in high-speed CAN applications within the automotive industry. It is suitable for various automotive systems, including:
- Engine control units.
- Transmission control units.
- Body control modules.
- Infotainment systems.
- Other automotive networks that require reliable and high-speed data communication.
Q & A
- What is the primary function of the TJA1049T,112?
The TJA1049T,112 acts as an interface between a CAN protocol controller and the physical two-wire CAN bus, enabling high-speed data communication. - What standards does the TJA1049T,112 comply with?
The TJA1049T,112 complies with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 standards. - What are the operating voltage ranges for the TJA1049T,112?
The operating voltage range is 4.75 V to 5.25 V. - What are the key features of the Standby mode in the TJA1049T,112?
The Standby mode features very low current consumption, host and bus wake-up capability, and reduced power consumption by switching off the transmitter and Normal-mode receiver blocks. - How does the TJA1049T,112 protect against ESD and transients?
The TJA1049T,112 has high ESD handling capability on the bus pins and protects against transients in automotive environments. - What is the maximum data rate supported by the TJA1049T,112 in CAN FD fast phase?
The TJA1049T,112 supports data rates up to 5 Mbit/s in the CAN FD fast phase. - Is the TJA1049T,112 thermally protected?
Yes, the output drivers of the TJA1049T,112 are thermally protected. - What is the purpose of the SPLIT output pin in the TJA1049T,112?
The SPLIT output pin is used for stabilizing the recessive bus level. - Can the TJA1049T,112 be used in 3 V to 5 V microcontroller systems?
Yes, versions like TJA1049T/3 and TJA1049TK/3 can be interfaced directly to microcontrollers with supply voltages from 3 V to 5 V. - What is the virtual junction temperature range for the TJA1049T,112?
The virtual junction temperature range is -40°C to +150°C.
