Target Data

TLE 6285

Version 1.02

6

2002-05-15

2

Circuit Description

The TLE 6285 is a single-wire transceiver combined with a LDO. It is a chip by chip

integrated circuit in a P-DSO-16-4 package. It works as an interface between the

protocol controller and the physical bus. The TLE 6285 is especially suitable to drive the

bus line in LIN systems in automotive and industrial applications. Further it can be used

in standard ISO9141 systems. The on-chip voltage regulator with watchdog is designed

for sleep mode applications but it is also possible to use an external voltage regulator.

Figure 3

Operation Mode State Diagram

2.1

Operation Modes

In order to reduce the current consumption the TLE 6285 offers a sleep operation mode.

This mode is selected by switching the enable input EN low (see figure 3, state

diagram). In the sleep mode a voltage regulator can be controlled via the INHO output

in order to minimize the current consumption of the whole application. A wake-up caused

by a message on the communication bus automatically enables the voltage regulator by

switching the INHO output high. In parallel the wake-up is indicated by setting the RxD

output low. When entering the normal mode this wake-up flag is reset and the RxD

output is released to transmit the bus data.

Start Up

Power Up

Wake Up

t > t

WAKE

ENLIN

low

ENLIN

(V

CC

high

ON)

ENLIN

high

Normal Mode

ENLIN

ON

INHO

high

high

Sleep Mode

ENLIN

V

CC

INHO

low floating

Stand-By

V

CC

INHO

low high

RxD

ON

ENLIN