TLE 7259G Infineon Technologies, TLE 7259G Datasheet - Page 6

• Manufacturer Part Number: TLE 7259G
• Manufacturer: Infineon Technologies

Specifications of TLE 7259G

• Packages: P-DSO-8
• Transmission Ratemax: 10.4 - 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

Table 2
Mode
Sleep
Stand-By Low
Normal
1) Pull-up resistor to micro controller power supply (
2) TxD indicates logical “Low“ in case the micro controller output is set to “High“ and the micro controller output current is
3) TxD indicates logical “High“ in case the micro controller output is set to “High“.
4.2
The TLE7259G enters the normal mode after the micro controller sets EN = high (see
operation mode the LIN bus receiver and the LIN bus transmitter are active. Data from the micro controller is
transmitted to the LIN bus via the TxD pin, the receiver detects the data stream on the LIN bus and outputs it to
the RxD pin.
4.3
The Stand-By mode is entered automatically after:
•
•
•
•
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 TxD pins are indicating the wake-up source. The RxD pin remains
“Low“ after a local and bus wake-up event. A power-up event is indicated by a logical “High“ on RxD pin. The signal
on the TxD pin indicates the wake-up source, a weak pull-down signals a bus wake-up event and a strong pull-
down signals a local wake-up event caused by the WK pin (see
the TxD pin, the external micro controller needs outputs 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.
The signal on the EN pin remains “Low“ due to an internal pull-down resistor. Setting the EN pin to “High“, by the
micro controller the device returns to Normal operation mode. Entering the Stand-By mode switches the INH
output to
be controlled by the INH output.
Data Sheet
limited to less than 1.9 mA.
A power-up event on the supply
A wake-up event on the LIN bus.
A local wake-up event on the pin WK.
A power on reset caused by power supply
V
EN
Low
High
S
. Depending on the operation mode of the TLE7259G external circuitry, like a voltage regulator, can
Operating modes
Normal Operation Mode
Stand-By Mode
INH
Floating Low
High
High
TxD
Low
High
Low
High
2)
3)
V
S
.
RxD
High
Low
High
Low
High
1)
1)
V
V
S
High
Impedance
30 kΩ
(typical)
30 kΩ
(typical)
Termination
IO
dropping below
) required (see
LIN Bus
6
Comments
No wake-up request detected
RxD “Low” after local or bus wake-up
RxD “High“ after power-up
TxD strong pull down after local wake-up (WK
pin)
TxD weak pull down after bus wake-up or power-
up
RxD reflects the signal on the LIN bus
TxD driven by the micro controller
Table
Figure 11
V
3)
S,UV,PON
2)
2). In order to detect a wake-up event via
and
(
V
S
Figure
<
V
S,UV,PON
12).
Functional Description
).
Figure
Rev 2.1, 2007-04-27
3). In Normal
TLE7259G