TLE7250X Datasheet, PDF (11/34 Pages) Infineon Technologies AG – High Speed CAN-Transceiver

TLE7250XLE
TLE7250XSJ
Functional Description
4.3
Power-up and Undervoltage Condition
By detecting an undervoltage event, either on the transmitter supply V_CC or the digital supply V_IO, the transceiver
TLE7250X changes the mode of operation. Turning off the digital power supply V_IO, the transceiver powers down
and remains in the power-down state. While switching off the transmitter supply V_CC, the transceiver changes to
the forced power-save mode, (details see Figure 5).
V_IO “on”
V_CC “on”
RM “0”
normal-operating
mode
RM V_CC V_IO
0 “on” “on”
power-down
state
RM V_CC V_IO
“X” “X” “off”
V_IO “on”
V_CC “off”
RM “X”
V_IO “on”
V_CC “on”
RM “0”
V_IO “on”
V_CC “on”
RM “1”
V_IO “on”
V_CC “on”
RM “1”
receive-only
mode
RM V_CC V_IO
1 “on” “on”
V_IO “on”
V_CC “off”
RM “0”
V_IO “on”
V_CC “on”
RM “0”
forced power-save
mode
RM V_CC V_IO
“X” “off” “on”
V_IO “on”
V_CC “on”
RM “1”
V_IO “on”
V_CC “off”
RM “1”
Figure 5 Power-up and undervoltage
Table 2 Modes of operation
Mode
RM
V_IO
V_CC
Normal-operating “low” “on” “on”
Receive-only
“high” “on” “on”
Forced power-save “X”
“on”
“off”
Power-down state “X”
“off” “X”
Bus Bias Transmitter
V_CC/2
“on”
V_CC/2
“off”
floating “off”
floating “off”
Normal-mode Low-power
Receiver
Receiver
“on”
not available
“on”
not available
“off”
not available
“off”
not available
Data Sheet
11
Rev. 1.0, 2015-08-12