TLE7250_15 Datasheet, PDF (12/34 Pages) Infineon Technologies AG – High Speed CAN-Transceiver

TLE7250LE
TLE7250SJ
Functional Description
4.3.1 Power-down State
Independent of the NEN and NRM input pins the TLE7250 is in power-down state when the transmitter supply
voltage V_CC is turned off (see Figure 5).
In the power-down state the input resistors of the receiver are disconnected from the bus biasing V_CC/2. The CANH
and CANL bus interface of the TLE7250 is floating and acts as a high-impedance input with a very small leakage
current. The high-ohmic input does not influence the “recessive” level of the CAN network and allows an optimized
EME performance of the entire HS CAN network (see also Table 2).
4.3.2 Power-up
The HS CAN transceiver TLE7250 powers up if the transmitter supply V_CC is connected to the device. By default
the device powers up in power-save mode, due to the internal pull-up resistor on the NEN pin to V_CC.
In case the device needs to power-up to normal-operating mode, the NEN pin needs to be pulled active to logical
“low” while the NRM pin is logical “high” (see Figure 5).
Data Sheet
12
Rev. 1.0, 2015-08-12