NCV7361A ON Semiconductor, NCV7361A Datasheet - Page 25

• Manufacturer Part Number: NCV7361A
• Description: Voltage Regulator
• Manufacturer: ON Semiconductor

Connection to Flash−MCU
should be disconnected from the MCU. This can be done
by disconnecting the supply voltage of the NCV7361A or
by turning off the NCV7361A with the EN pin. A blocking
Operating During Disturbance
Operating Without V
to GND + 30 V. This prevents loss of communication
between other bus nodes with the loss of V
GND. The BUS pin will remain at V
will be minimal with the loss of GND or V
Short Circuit BUS to V
Short Circuit BUS to GND
NCV7361A.
Short Circuit TxD to GND
as is the LIN bus. This state can only be detected from the
LIN controller. In this case the controller must switch−off
the LIN node via the EN input of the NCV7361A and look
for a recessive state. A thermal shutdown of NCV7361A
will appear if the thermal shutdown threshold is exceeded.
TxD Open
recessive state. The communication between the other
bus−nodes will not be disturbed.
During programming of a flash MCU the NCV7361A
The BUS pin is designed for voltages of GND − 24 V up
The LIN bus is blocked. There is no influence to the
The LIN transceiver is permanent in the dominant state
The internal pullup resistor forces the LIN node to the
Recessive
Dominant
LIN bus is blocked, no influence to the
NCV7361A
Current limit, thermal shutdown of
NCV7361A if power dissipation raises T
Figure 38. Example Circuitry for Connection of RxD to MCU for Flash Programming
SUP
BAT
or GND
V
V
high_RxD
low_RxD
BAT
= 0.8 V
> 4.7 V at V
and current draw
NCV7361A
SUP
SUP
10mF...47mF
.
RESET
or loss of
V
RxD
DD
TxD
OUT
http://onsemi.com
= 5 V
NCV7361A
47nF...100nF
+
J
25
0.7 V
Prog.−Data
diode must be used between the MCU and the RxD pin to
avoid loading of the programming data.
LIN pin, if the MCU supports this kind of flash mode.
Short Circuit V
is comparable with the behavior in the sleep mode.
Overload of V
Thermal Switch−Off
between I
thermal shutdown threshold of > 155 C, the transceiver
will be switched off. The voltage regulator will also be
switched off and a reset signal is forced.
Overcurrent
down. If this voltage is below the threshold V
will be forced.
Undervoltage V
driver during undervoltage. The BUS pin generates the
recessive state if V
have pull−down and pull−up circuits respectively.
to the bus. The receive mode is also active.
Short Circuit RxD, RESET to GND or V
The programming of the flash is also possible via the
The V
The power dissipation is increasing if the load current is
If the current limit is active the voltage on V
The reset circuit guarantees the correct behavior of the
If V
Both outputs are short circuit proof to V
V
MRes
high
OUT
= 4 V at V
VOUT_max
v V
pin is protected via a current limit. This state
mC
OUT
OUT
OUT
SUP
DD
OUT
to GND
, V
v 4.5 V the TxD signal is transmitted
and I
= 5 V
OUT
< V
LVOUT
MRes
. The inputs EN and TxD
. If the IC exceeds the
OUT
OUT
and ground.
RES,
OUT
a reset
drops