TLE6263 datasheet(9/40 Pages) INFINEON

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Final Datasheet TLE 6263

Version 2.08

2004-06-07

off by disabling the voltage regulator. That allows the total current consumption to drop

down to less than 100 µA.

When a reset occurs, due to false watchdog triggering, the TLE6263 automatically

switches from normal mode or receive-only mode respectively, to the Vbat stand-by

mode. If a watchdog reset occurs in the Vbat stand-by mode the IC remains in this mode.

In sleep mode a wake-up at any of the wake-up inputs as well as via the bus lines

(CANH or CANL) automatically sets the TLE 6263 in Vbat stand-by mode. In the Vbat

stand-by mode a wake-up is monitored by setting the output RxD low. This feature

works as a flag, to indicate a wake event to the microcontroller. To send and to receive

messages, the CAN-transceiver has to be set to normal operation mode by the

microcontroller.

In case the IC shall directly be set back to sleep mode after a wake-up, an internal wake-

flip-flop has to be reseted via the SPI. Therefore IBIT1 has to be set high and then low

again by a second SPI transmission. A transition from the Vbat stand-by mode to the

normal mode or receive-only mode respectively, automatically resets the wake-flip-flop.

6.2

Low Dropout Voltage Regulator

The integrated low dropout voltage regulator is able to drive the internal loads (e.g.

CAN-circuit) as well as external 5V loads. Its output voltage tolerance is better than ±

2%. The maximum output current is limited to 110 mA.

An external reverse current protection is recommended at the pin Vs to prevent the

output capacitor from being discharged by negative transients or low input voltage.

Stability of the output voltage is guaranteed for output capacitors CQ ≥ 100 nF,

nevertheless it is recommended to use capacitors CQ ≥ 10 µF to buffer the output

voltage and therefore improve the reset behavior at input voltage transients.

To stabilize the internal supply a capacitor CVI ≥ 100 nF directly connected to the pin VCI

is required.

6.3

CAN Transceiver

The TLE 6263 is optimized for low speed data transmission up to 125 kBaud in

automotive applications. Figure 4 shows the principle configuration of a CAN

network.Normally a differential signal is transmitted and received respectively. When a

bus wiring failure (see table 2) is detected the device automatically switches to a

dedicated CANH or CANL single-wire mode to maintain the communication if

necessary. Further a receive-only mode is implemented that allows a separate CAN

node diagnosis. During normal and RxD-only mode, RTL is switched to VCC and RTH

to GND. During Vbat stand-by and the cyclic wake mode, RTL is switched to VS and RTH

to GND.

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