BUS IC

DC/DC CONVERTER

MOTOR DRIVER IC

RIPPLE COUNTER

16

BLOCK DIAGRAM

DRIVER IC

I/O IC

SENSOR IC

SENSOR INTERFACE IC

17

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circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication

has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of

the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.

Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.

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PINNING

PACKAGE

ÿ LIN transceiver with voltage regulator and watchdog

E910.48

VBAT

µC

LIN transceiver

voltage regulator

SEL 3.3V/5V

watchdog

reset

&

control

VS

VS1

MOD

EN

SELRES

SELWD

WDIN

RESW

RESET

RxD

TxD

WU

BUS

VDD

VDDS

100n

VDDS

VS

PWR Option

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

VS

VS1

VRES

DRES

TxD

RxD

GND

BUS

VCC

VCCS

MOD5

WU

EN

WD

RESW

RES

Pin

Name

Description

1

VS

Battery supply + 12V

2

VS1

Battery supply through external resistor

(e.g. RVS1=140Ý for Ivcc=100mA)

3

VRES

Reset threshold select, weak pull up

(VRES=H/L --> thresold high / threshold low)

4

DRES

Reset duration and watchdog window select, weak

pull up (DRES=H/L --> reset duration 10ms / 100ms)

5

TxD

Transmitted serial data, pull up

6

RxD

Received serial data

7

GND

Ground

8

BUS

LIN-Bus Pin

9

RES

Reset output, active Low

10

RESW

Reset additional output with threshold higher on

200mV than RES threshold

11

WD

Watchdog input impulses from µC, pull down

12

EN

Enable input, active high, pull down

13

WU

Wake up via LIN-Bus

14

MOD

Voltage regulator output voltage mode, weak pull

down (MOD=H/L-->VCC=5V/3.3V)

15

VCCS

Output voltage sense input

16

VCC

Voltage regulator output (VCC=5V 3.3V,

Iload=0...100mA)

FEATURES

levels are programmable

Fixed: 37ms or 75ms

Variable: 3ms to 50ms

APPLICATION

communication including µC supervisory

especially in automotive applications

DESCRIPTION

The IC is used as a voltage regulator with an integrated LIN-inter-

face in automotive applications. The voltage regulator supplies

an µC in the application.

Providing an integrated watchdog with adjustable window dura-

tion the IC offers the best performance as a “System Basic Chip”.

When the EN pin is active (high), the voltage regulator is turned

on and the output voltage VCC is available. Its quality is regulated

by sensing with the VCCS pin. The regulator is switched on by LIN-

Bus wake up request or by µC directly at pin EN.

The external resistor between VS and VS1 keeps the internal pow-

er dissipation low without compromising low supply operation.

Both 5V and 3.3V applications are possible by selecting the output

voltage on pin MOD with a digital signal. No precision feedback

resistors are required.

The reset output is active (low) at VCC low, power on, power off

and with watchdog timed out. The reset threshold of VCC as well

as the reset impuls duration have two programmable levels .

K-Bus transceiver

LIN-/K-Bus transceiver

LIN transceiver+VREG

LIN transceiver

ÿ LIN transceiver+VREG+WD

Single wire CAN transceiver

CAN transceiver