
BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
14
BLOCK DIAGRAM
LIN transceiver
FEATURES
Supply voltage range VS
6
V to
18
V
Supply voltage range VDD
4.5
V to
5.5
V
LIN
2.0
compatible interface for
data rates up to
20
kBaud
Output slewrate control to reduce EMI
Short circuit current limitation
Over temperature protection
Bus-line DC voltage range –
24
V to +
30
V
Receiver debounce filter
Very low active current consumption
Very low standby current (typ. <
10
μA)
Wake up output by LIN-Bus transition and EN,
battery power on
–
40
°C to +
125
°C operating temperature
SO
8
n package
APPLICATION
Bus interface for Local Interconnect Network (LIN)
communication especially in automobile
applications
DESCRIPTION
The IC interfaces between a μC and a Local Interconnect Network
(LIN) bus-line, mainly in automotive sub bus applications. When
pin EN is at High level (VDD), a digital input signal at pin TxD
is transferred to the fully protected low side driver on pin BUS.
The voltage level on pin BUS is detected by a comparator with a
threshold of nominally
50
% of the battery supply VS. After pass-
ing a debounce filter it is valid on pin RxD as a digital signal refer-
enced to the digital supply voltage VDD.
EN also statically keeps the high side output INH active. A high to
low transition on EN as well as VDD falling under the POR thresh-
old will dynamically reset INH to high impedance. A debounced
low level on the bus-line for a certain time will set INH to high
level as well as a - power on condition - on the battery supply
pin VS.
VDD
VDD
VDD
EN
RXD
TXD
ext. voltage
regulator
INH
BUS
μC
control
wake up
&
POR
VBAT
VS
slewrate
control
EN
K-Bus transceiver
LIN- / K-Bus transceiver
LIN transceiver + VREG
LIN transceiver
LIN transceiver + VREG + WD
Single wire CAN transceiver
CAN transceiver