E910.48 Datasheet, PDF (1/1 Pages) ELMOS Semiconductor AG – LIN transceiver with voltage regulator and watchdog

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
ÿ LIN transceiver with voltage regulator and watchdog
RIPPLE COUNTER
FEATURES
ÿ Operating voltage range (VS) 3V to 27V
ÿ Two selectable output voltages: 5V and 3.3V ±2.0%
ÿ Output current 150mA
ÿ Reset impulse durations (10ms, 100ms) and threshold
levels are programmable
ÿ Selectable watchdog windows:
Fixed: 37ms or 75ms
Variable: 3ms to 50ms
ÿ LIN-bus interface, LIN specification 2.0
ÿ Output slew rate control to reduce EMI
ÿ Input voltage bus ranges from – 36V to + 40V
ÿ Wake up via bus
ÿ Standby current <30µA typical
ÿ Over temperature and output current protection
ÿ BUS pin protected of ESD voltage level 4kV
ÿ SO16 package
APPLICATION
ÿ Bus interface for Local Interconnect Network (LIN)
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 .
BLOCK DIAGRAM
VBAT
VDDS
µC
VS
VS1
MOD
EN
SELRES
SELWD
WDIN
RESW
RESET
WU
TxD
RxD
16
voltage regulator
SEL 3.3V/5V
watchdog
reset
&
control
LIN transceiver
VDD
VDDS
100n
VS
PWR Option
BUS
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
PINNING
Pin Name
1
VS
2
VS1
3
VRES
4
DRES
5
TxD
6
RxD
7
GND
8
BUS
9
RES
10 RESW
11
WD
12
EN
13
WU
14 MOD
15
VCCS
16 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)
E910.48
PACKAGE
VS
1
VS1
2
VRES
3
DRES
4
TxD
5
RxD
6
GND
7
BUS
8
16
VCC
15
VCCS
14
MOD5
13
WU
12
EN
11
WD
10
RESW
9
RES
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.
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elmos product catalog june 2005
17