BUS IC
K-Bus transceiver
LIN- / K-Bus transceiver
LIN transceiver + VREG
LIN transceiver
ÿ
LIN transceiver + VREG + WD
Single wire CAN transceiver
CAN transceiver
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
ÿ
LIN transceiver with voltage regulator and watchdog
FEATURES
ÿ
ÿ
ÿ
ÿ
ÿ
Operating voltage range (VS)
3V
to
27V
Two selectable output voltages:
5V
and
3.3V
±2.0%
Output current
150mA
Reset impulse durations (10ms,
100ms)
and threshold
levels are programmable
Selectable watchdog windows:
Fixed:
37ms
or
75ms
Variable:
3ms
to
50ms
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
LIN-bus interface, LIN specification
2.0
Output slew rate control to reduce EMI
Input voltage bus ranges from –
36V
to +
40V
Wake up via bus
Standby current <30µA typical
Over temperature and output current protection
BUS pin protected of ESD voltage level
4kV
SO16 package
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.
APPLICATION
ÿ
Bus interface for Local Interconnect Network (LIN)
communication including µC supervisory
especially in automotive applications
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 .
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.
Providing an integrated watchdog with adjustable window dura-
tion the IC offers the best performance as a “System Basic Chip”.
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.
PINNING
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
VS
VS1
VRES
DRES
TxD
RxD
GND
BUS
RES
RESW
WD
EN
WU
MOD
VCCS
VCC
Description
Battery supply +
12V
Battery supply through external resistor
(e.g. RVS1=140Ý for Ivcc=100mA)
Reset threshold select, weak pull up
(VRES=H/L --> thresold high / threshold low)
Reset duration and watchdog window select, weak
pull up (DRES=H/L --> reset duration
10ms
/
100ms)
Transmitted serial data, pull up
Received serial data
Ground
LIN-Bus Pin
Reset output, active Low
Reset additional output with threshold higher on
200mV
than RES threshold
Watchdog input impulses from µC, pull down
Enable input, active high, pull down
Wake up via LIN-Bus
Voltage regulator output voltage mode, weak pull
down (MOD=H/L-->VCC=5V/3.3V)
Output voltage sense input
Voltage regulator output (VCC=5V
3.3V,
Iload=0...100mA)
VS
VS1
VRES
DRES
TxD
RxD
GND
BUS
1
2
3
4
5
6
7
8
E910.48
PACKAGE
16
15
14
13
12
11
10
9
VCC
VCCS
MOD5
WU
EN
WD
RESW
RES
BLOCK DIAGRAM
VBAT
VS
VS1
MOD
VDDS
VS
VDD
voltage regulator
SEL 3.3V/5V
VDDS
PWR Option
100n
EN
SELRES
SELWD
WDIN
watchdog
reset
&
control
µC
RESW
RESET
WU
TxD
RxD
LIN transceiver
BUS
Note
ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
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.
www.elmos.de | sales@elmos.de
16
elmos product catalog june
2005
17
ELMOS [ ELMOS SEMICONDUCTOR AG ]
