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PDF TLE7259-2GE Data sheet ( Hoja de datos )
| Número de pieza | TLE7259-2GE | |
| Descripción | LIN Transceiver | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Data Sheet, Rev. 1.1, Sept. 2008
TLE7259-2GE
LIN Transceiver
Automotive Power
1 page  
3 Pin Configuration
3.1 Pin Assignment
TLE7259-2GE
Pin Configuration
RxD
EN
WK
TxD
1
2
3
4
8 INH
7 VS
6 BUS
5 GND
Figure 2 Pin Configuration
Note: The pin configuration of the TLE7259-2GE is pin compatible to the devices TLE7259G, TLE7259-2GU and
the Twin LIN Transceiver TLE7269G. In comparison to the TLE7269G, the TLE 7259-2GE has no separate
VIO power supply and needs a pull up resistor at the RxD pin. Details can be found inside the chapter “Pin
Compatibility to other LIN Transceivers” on Page 25.
3.2 Pin Definitions and Functions
Pin Symbol
1 RxD
2 EN
3 WK
4 TxD
5 GND
6 BUS
Function
Receive data output;
External Pull Up necessary
LOW in dominant state, active LOW after a Wake-Up event at BUS or WK pin
Enable input;
integrated pull-down, device set to normal operation mode when HIGH
Wake input;
active LOW, negative edge triggered, internal pull-up
Transmit data input;
integrated pull-down, LOW in dominant state; active LOW after Wake-Up via WK pin
Ground
Bus input / output;
LIN bus line input / output
LOW in dominant state
Internal termination and pull-up current source
Data Sheet
5 Rev. 1.1, 2008-09-05
5 Page 
Normal Slope
Mode
EN
tfl1
Flash Mode
TLE7259-2GE
Functional Description
Normal Slope
Mode
tfl1
TxD
Data transmission
Data transm.
Figure 6
tfl2 tfl3
tfl4 ttorec
Timing to enter and leave Flash Mode
tfl2 tfl3
tfl4 ttorec
4.3 Stand-By Mode
The Stand-By mode is entered automatically after:
• A Power-Up event at the supply VS.
• A bus Wake-Up event at the pin BUS.
• A local Wake-Up event at the pin WK.
• A power on reset caused by power supply VS
• In Stand-By mode the Wake-Up sources are monitored by the TxD and RxD pins.
In Stand-By mode no communication on the LIN Bus is possible. The output stage is disabled and the LIN Bus
termination remains activated. The RxD and the TxD pin are used to indicate the Wake-Up source or a Power-Up
event. The RxD pin remains “Low“ after a local Wake-Up event on the pin WK and a bus Wake-Up event on the
LIN bus. A Power-Up event is indicated by a logical “High“ on the RxD pin. The signal on the TxD pin indicates the
Wake-Up source, a weak pull-down signals a bus Wake-Up event on the LIN bus and a strong pull-down signals
a local Wake-Up event caused by the WK pin (see Table 1 and Table 2). In order to detect a Wake-Up event via
the TxD pin, the external microcontroller output needs to provide a logical “High” signal. The Wake-Up flags
indicating the Wake-Up source on the pins TxD and RxD are reset by changing the operation mode to Normal
Operation mode.
The signal on the EN pin remains “Low“ due to an internal pull-down resistor. Setting the EN pin to “High“, by the
microcontroller returns the TLE7259-2GE to Normal Operation mode. In Stand-By mode the INH output is
switching to VS. The INH output can be used to control external devices like a voltage regulator.
Table 2 Logic table for wake up monitoring
power up WK BUS
RxD1)
TxD2)
Remarks
Yes
11
1
1 No Wake-Up, Power-Up event
No
Wake- 1
0
0 Wake via wake pin
Up3)
No
1 Wake- 0
1 Wake via BUS
Up4)
1) To indicate the Wake-Up sources via the RxD pin, a pull-up resistor to the external microcontroller supply is required.
2) The TxD input needs an external termination to indicate a “High” or a “Low” signal. The external termination could be a
pull-up resistor or an active microcontroller output.
3) A local Wake-Up event is considered after a low signal on the pin WK (see Chapter 4.7).
4) A bus Wake-Up event is considered after a low to high transition on the LIN bus (see Chapter 4.6)
Data Sheet
11 Rev. 1.1, 2008-09-05
11 Page | ||
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