BUS IC
ÿ
K-Bus transceiver
LIN- / K-Bus transceiver
LIN transceiver + VREG
LIN transceiver
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
K-Bus transceiver
FEATURES
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
Supply voltage range VS
6.9V
to
19V
Supply voltage range VDD
4.5V
to
5.5V
Data rate up to
9.600
Baud
Bus-line input voltage range from –
24V
to +
30V
(+40V for t <
0.5s)
Internal monitoring of prohibited conditions
Output slewrate control to reduce EMI
Very low standby current (30µA typical)
Useable as diagnostic interface to ISO
9141
–
40°C
to +
125°C
operating temperature
SO14n package
Undefined states are avoided during low voltage conditions by
means of a Power-on-Reset which blocks the outputs. The inputs
feature internal pull-up and pull-down current sources to main-
tain defined levels.
The bus pins TRM and REC feature a wide input voltage range
from –
24V
to +
40V
independent of VS and VDD. This ensures that
in case of missing ground or power supply connection the opera-
tion of other devices using the bus is not affected.
DESCRIPTION
The IC is designed for communication via bidirectional serial data
channels. In addition to the level conversion of transmit and re-
ceive signals from the micro processor’s voltage level to the
12V
bus level, the device includes plausibility checks in order to guar-
antee undisturbed bus communication in case of corrupted data
from the micro controller.
PINNING
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
RxMI
MIR
GND
VDD
TRM
REC
VS
PU
MI
SEN/STA
TxD
BCEN
RxD
NRxD
Description
Receive data from MI-Bus
MI-Bus input
Ground
+5V supply
Transmitter output
K-Bus input
+12V supply
Switching pull-up between VDD and VS
MI-mode, disables slewrate control on TRM
Status of transmit path
Transmit data to TRM
Enable bit compare function
Receive data from K-Bus
Inverted RxD
RxMI
MIR
GND
VDD
TRM
REC
VS
1
2
3
4
5
6
7
E910.05
PACKAGE
14
13
12
11
10
9
8
NRxD
RxD
BCEN
TxD
SEN/STA
MI
PU
APPLICATION
ÿ
Automotive low speed bus systems
BLOCK DIAGRAM
VBAT
VS
VDD
VDD
RxD
NRxD
Ref. 12
REC
TRM
µC
TxD
BCEN
SEN/STA
PU
MI
RxMI
control
slewrate
control
& current-
limitation
MIR
Ref.5
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.
8
Copyright ©
2005
ELMOS
Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
www.elmos.de | sales@elmos.de
elmos product catalog june
2005
9
ELMOS [ ELMOS SEMICONDUCTOR AG ]
