Datasheet

10

Rev. 1.11

2019-09-19

High Speed CAN Transceiver

TLE9251V

Modes of operation

6

Modes of operation

The TLE9251V supports three different modes of operation (see Figure 4 and Table 5):

• Normal-operating mode

•Stand-by mode

•Forced-receive-only mode

Mode changes are either triggered by the mode selection input pin STB or by an undervoltage event on the

transmitter supply VCC. Wake-up events on the HS CAN bus are indicated on the RxD output pin in Stand-by

mode, but no mode change is triggered by a wake-up event. An undervoltage event on the digital supply VIO

powers down the TLE9251V.

Figure 4

Mode state diagram

Table 5

Modes of operation

Mode

STB

VIO VCC Bus Bias Transmitter Normal-mode

Receiver

Low-power

Receiver

Normal-operating

“low” “on” “on” VCC/2

“on”

“on”

“off”

Forced-receive-only

“low” “on” “off” GND

“off”

“on”

“off”

Stand-by

“high” “on” “X” GND

“off”

“off”

“on”

Power-down state

“X”

“off” “X” floating

“off”

“off”

“off”

STB

VCC

VIO

Power-down

state

“X”

“X”

“off”

Normal-operating

mode

STB

VCC

VIO

0

“on”

“on”

Forced-

receive-only

mode

STB

VCC

VIO

0

“off”

“on”

Stand-by

mode

STB

VCC

VIO

1

“X”

“on”

VIO “on”

VCC “off”

STB “0”

VIO “on”

VCC “on”

STB “0”

VIO “on”

VCC “X”

STB “1”

VIO “on”

VCC “off”

STB “0”

VIO “on”

VCC “X”

STB “1”

VIO “on”

VCC “on”

STB “0”

VIO “on”

VCC “on”

STB “0”

VIO “on”

VCC “X”

STB “1”