TJA1050 High-Speed CAN Transceiver

TJA1050 High-Speed CAN Transceiver

The TJA1050 serves as the interface between the CAN protocol controller and the physical bus, offering differential transmit and receive capabilities. It succeeds the PCA82C250 high-speed CAN transceiver, boasting significant improvements such as substantially reduced Electromagnetic Emission (EME) through the optimal matching of CANH and CANL output signals and enhanced performance when nodes are unpowered.

Designed primarily for high-speed automotive applications, the TJA1050 operates at baud rates ranging from 40 to 1 Mbaud. It is fully compliant with the ISO 11898 standard. The device features a current-limiting circuit that safeguards the transmitter output stage from damage due to short-circuits to the battery voltage, and a thermal protection circuit that deactivates the transmitter if the junction temperature surpasses approximately 165 °C, thus reducing the IC’s power dissipation and temperature. However, all other IC functions remain operational, with the transmitter’s off-state resetting once TXD goes HIGH. This thermal protection is crucial during bus line short-circuits. Additionally, the CANH and CANL lines are fortified against automotive electrical transients as per ISO 7637 and can withstand Electro-Static Discharge (ESD) up to 4 kV.

The control line S (pin 8) enables the selection between two modes: high-speed mode and silent mode. High-speed mode, the standard operating mode, is activated by grounding pin S and is the default when pin S is left unconnected. Silent mode, on the other hand, allows the transm

Features:

1. Supply voltage:  4.75~ 5.25V
2.  CANH DC voltage: −27 +40V
3. Fully compatible with the “ISO 11898” standard
4. High speed (up to 1 Mbaud)
5. Transmit Data (TXD) dominant time-out function
6. Bus lines protected against transients in an automotive environment
7. The silent mode in which the transmitter is disabled
8. Differential receiver with wide common-mode range for high Electro Magnetic Immunity (EMI)
9. Input levels compatible with 3.3 V devices
10. Thermally protected
11. Short-circuit proof to battery and ground
12. An unpowered node does not disturb the bus lines
13. At least 110 nodes can be connected.
14. Operating ambient temperature −40 +125 °C
15. body Package: 8 leads
16. Body width: 3.9 mm
17. Package: SOT96-1

Package Includes

1 x TJA1050 IC