Application Note TLE7250 About this document Z8F54978220

Application Note

Z8F54978220

Pin Description line between transceiver and microcontroller. A series resistor may add delay, which degrades the performance of the transceiver, especially in high data rate applications.

5.5

CANH and CANL Pins

CANH and CANL are the CAN bus input and output pins. The TLE7250 is connected to the bus via pin CANH and

CANL. Transmitter output stage and receiver are connected to CANH and CANL. Data on the TxD pin is transmitted to CANH and CANL and is simultaneously received by the receiver input and signalled on the RxD output pin. For achieving optimum EME (Electromagnetic Emission) performance, transitions from dominant to recessive and from recessive to dominant are done as smooth as possible also at high data rate. Output

levels of CANH and CANL in recessive and dominant state are described in Table 1

. Due to the excellent ESD performance on CANH and CANL no external ESD components are necessary to fulfill OEM requirements.

5.6

GND Pin

The GND pin must be connected as close as possible to module ground in order to reduce ground shift. It is not recommended to place filter elements or an additional resistor between GND pin and module ground. GND must be the same for transceiver, microcontroller and HS CAN bus system.

Application Note 10 Rev. 1.1

2016-05-03