TLE 7259-2GE Infineon Technologies, TLE 7259-2GE Datasheet - Page 9

• Manufacturer Part Number: TLE 7259-2GE
• Manufacturer: Infineon Technologies

Specifications of TLE 7259-2GE

• Packages: PG-DSO-8
• Transmission Ratemax: 20.0 kbit/s
• Quiescent Current (max.): < 10 µA sleep mode
• Bus Wake-up Capability: Yes
• Additional Features: INH, EN, WK
• Wake-up Inputs: Bus wake-up + wake-up pin

The TLE7259-2GE has 3 major operation modes:
•
•
•
The Normal Operation mode contains 2 sub-operation modes, which differentiate by the slew rate control of the
LIN Bus signal (see
Sub-operation modes with different slew rates on the BUS pin:
•
•
The operation mode of the TLE7259-2GE is selected by the EN pin. (see
Table 1
Mode
Sleep
Stand-By Low
Normal
Operation
1) 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-
4.2
The TLE7259-2GE 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. Data from the microcontroller
is transmitted to the LIN bus via the TxD pin, the receiver detects the data stream on the LIN bus and forwards it to
the RxD output pin. In Normal Operation mode, the INH pin is “High” (set to
30 k .
Normal Slope mode and the Flash mode are Normal Operation modes and in these sub-modes the behavior of
the INH pin and the bus termination is the same. Per default the TLE7259-2GE always enters into Normal Slope
mode, either from Sleep mode or from Stand-By mode. The 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 TLE7259-2GE is disabled
and set to recessive state during the mode change procedure. To release the TLE7259-2GE for data
communication on the LIN bus, the TxD pin needs to be set to “High” for the time
Data Sheet
Stand-By mode
Normal Operation mode
Sleep mode
Normal Slope mode, for data transmission rates up to 20 kBaud
Flash mode, for programming of the external microcontroller
up resistor or an active microcontroller output.
EN
Low
High High
Operating modes
Normal Operation Mode
INH
Floating Low
High
Figure
4).
TxD
Low
High
Low
High
2)
RxD
High
Low
High
Low
High
1)
1)
Termination
High
Impedance
30 k
(typical)
30 k
(typical)
LIN Bus
9
Comments
No wake-up request detected
RxD “Low” after local Wake-Up (pin WK) or bus
Wake-Up (pin BUS)
RxD “High“ after Power-Up
TxD strong pull down after local Wake-Up (WK
pin)
TxD weak pull down after bus Wake-Up (pin BUS)
or Power-Up
RxD reflects the signal on the BUS
TxD driven by the microcontroller
2)
Figure
2)
V
S
) and the bus termination is set to
4).
t
to,rec
.
Functional Description
Rev. 1.1, 2008-09-05
TLE7259-2GE
Figure
4). In