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TLE7258D_15 Datasheet, PDF (26/31 Pages) Infineon Technologies AG – TLE7258D | |||
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TLE7258D
Application Information
Table 9 TxD Termination
Operation Mode
Normal Operation mode
Standby mode
Sleep mode
Remarks
The internal pull-up structure is active, in case the TxD input is open the
TxD input signal is âhighâ and the output on the BUS pin is ârecessiveâ
The internal pull-up structure is active, in case the TxD input is open the
TxD input signal is âhighâ. In Standby mode the transmitter is turned off
and therefore the output on the BUS pin always is ârecessiveâ
The internal pull-up structure is inactive, in case the TxD input is open the
TxD input signal is âfloatingâ. In Sleep mode the transmitter is turned off
and therefore the output on the BUS pin always is ârecessiveâ
7.6
RxD Pull-up Resistor
The receive data output (RxD) provides an open drain behavior for allowing the output level to be adapted to the
microcontroller supply voltage. Thus 3.3 V microcontroller derivatives without 5 V tolerant ports can be used. In
case the microcontroller port pin does not provide an integrated pull-up, an external pull-up resistor connected to
the microcontrollerâs VCC supply voltage is required.
The typical RxD pin current / voltage characteristic over temperature is given in Figure 16. With the applications
microcontroller port pinsâ (Rx) minimum âhighâ-level and maximum âlowâ-level input voltage the pull-up resistor can
be dimensioned. For most applications a pull-up resistor RRx of 2.4 k⦠is recommended.
1.4
Tj = â40°C
1.2
Tj = 27°C
Tj = 150°C
1
0.8
0.6
0.4
0.2
0
0
1
2
3
4
5
6
7
8
IRxD [mA]
Figure 16 Typical RxD output sink characteristics
Data Sheet
26
Rev. 1.2, 2014-12-08
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