TLE8458G Infineon Technologies, TLE8458G Datasheet - Page 11

• Manufacturer Part Number: TLE8458G
• Description: IC LDO VREG/LIN TXRX DSO-8
• Manufacturer: Infineon Technologies
• Type: Transceiverr

Specifications of TLE8458G

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 7 V ~ 27 V
• Mounting Type: Surface Mount
• Package / Case: DSO-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.2.1
The Stand-By Mode is an idle operation mode, which disables the communication to the LIN bus. The TLE8458Gx
enters automatically the Stand-By Mode after a power-up. By setting the EN pin to HIGH, the operation mode
changes to Normal Operation Mode, regardless of the signal applied to the TxD pin.
The TLE8458Gx can be transferred to Stand-By mode by the following options:
•
•
•
•
In Stand-By mode the external power supply
provides the following functionality in Stand-By Mode:
•
•
•
•
•
•
•
Table 6
Power - Up
Yes
No
No
1) The Wake - Up monitor is only active in Stand-By Mode
2) The TxD input needs an external termination to indicate a “High” or a “Low” signal. The external termination could be a pull-
5.2.2
The TLE8458Gx enters the Normal Operation Mode after the microcontroller sets EN to “High” (see
Normal Operation mode the LIN bus receiver and the LIN bus transmitter are active. The TLE8458Gx converts the
logical HIGH and LOW signals on the TxD input pin to DOMINANT and RECESSIVE signals to the LIN bus.
Simultaneously the input receiver of the TLE8458Gx converts the DOMINANT and RECESSIVE signals on the LIN
bus to HIGH and LOW signals to the RxD output. In Normal Operation mode the output voltage
bus termination is set to 30 kΩ.
Normal Slope Mode and the Software Flash Mode are Normal Operation Modes. In these two sub-modes the
behavior of the power-supply
into Normal Slope Mode, either from Sleep Mode, Stop Mode or from Stand-By Mode. The Software Flash Mode
can only be entered from Normal Slope mode.
In order to avoid any bus disturbance during a mode change, the output stage of the TLE8458Gx is disabled and
set to recessive state during the mode change procedure. To release the TLE8458Gx for data communication on
the LIN bus, the TxD pin needs to be set to HIGH for the time
Data Sheet
After power - up on the supply
From Sleep Mode or from Stop Mode the TLE8458Gx changes to Stand-By Mode if a Wake - Up event occurs
on the LIN bus.
From Sleep Mode or from Stop Mode the TLE8458Gx changes to Stand-By Mode if a Wake - Up event occurs
on the local Wake input WK.
In case of an under - voltage event on
operation mode.
The power supply
The LIN transceiver output stage is disabled, no communication to the LIN bus is possible.
The LIN transceiver bus input receiver is disabled.
The LIN bus is terminated by the 30 kΩ.
Both digital pins, the TxD pin and the RxD pin act as output pins and indicate a Wake - Up or a Power - Up
event
The EN input pin is active. By setting the EN pin to HIGH the TLE8458Gx changes the operation mode to
Normal Operation Mode (see
The Wake - Up logic is disabled. Wake-Up events don’t trigger an operation mode change.
up resistor or an active microcontroller output.
2)
.
Stand-By Mode
Logic table for Wake - Up monitoring
Normal Operation Mode
Wake - Up event RxD
No
Via LIN Bus
Via WK Pin
V
CC
is active and functional.
V
CC
Figure
and the bus termination are the same. Per default the TLE8458G always enters
V
S
, the TLE8458Gx starts in Stand-By Mode.
HIGH
LOW
LOW
3).
V
S
, the TLE8458Gx changes to Stand-By Mode regardless of selected
V
CC
is active and LIN bus output stage is disabled. The TLE8458Gx
1)
TxD
LOW
HIGH
LOW
11
2)
t
torec
after the operation mode change.
Comments
Power Up event
Wake - Up via LIN Bus
Wake - Up via local Wake pin WK
Rev. 1.01, 2009-04-28
V
CC
is active and the
TLE8458Gx
Mode Control
Figure
4). In