TLE7251V_15 Datasheet, PDF (11/36 Pages) Infineon Technologies AG – High Speed CAN-Transceiver with Bus Wake-up

TLE7251VLE
TLE7251VSJ
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
TLE7251V 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 either
changes to the forced stand-by mode, or remains in stand-by mode (details see Figure 5).
V_IO “on”
V_CC “on”
STB “0”
normal-operating
mode
STB V_CC V_IO
0 “on” “on”
power-down
state
STB V_CC V_IO
“X” “X” “off”
V_IO “on”
V_CC “off”
STB “0”
V_IO “on”
V_CC “on”
STB “0”
V_IO “on”
V_CC “X”
STB “1”
V_IO “on”
V_CC “X”
STB “1”
Figure 5 Power-up and undervoltage
stand-by
mode
STB V_CC V_IO
1 “X” “on”
V_IO “on”
V_CC “off”
STB “0”
V_IO “on”
V_CC “on”
STB “0”
forced stand-by
mode
STB V_CC V_IO
0 “off” “on”
V_IO “on”
V_CC “X”
STB “1”
Table 2 Modes of operation
Mode
STB
V_IO
V_CC
Bus Bias Transmitter Normal-mode Low-power
Receiver
Receiver
Normal-operating “low”
“on”
“on”
V_CC/2
“on”
“on”
“off”
Stand-by
“high”
“on”
“X”
GND
“off”
“off”
“on”
Forced stand-by “low”
“on”
“off”
GND
“off”
“off”
“on”
Power-down state “X”
“off”
“X”
floating “off”
“off”
“off”
Data Sheet
11
Rev. 1.0, 2015-09-10