TH3122
K-Bus Transceiver with integrated Voltage Regulator
Features and Benefits
K-Bus Transceiver:
PNP-open emitter driver with slew rate control and current limitation
BUS input voltage -24V ... 30V (independently of V
S
)
ISO 9141 and ODBII compliant
Possibility of BUS wake up
Operating voltage V
S
= 5.5 ... 16 V
Very low standby current consumption <100
µ
A
in normal mode (< 50
µ
A in sleep mode)
Linear low drop voltage regulator:
Output voltage 5V± 2%
Output current max. 100mA
Output current limitation
Overtemperature shutdown
Pin Diagram
SOIC16
VS
EN
VTR
GND
GND
BUS
SI
SO
1
16
VCC
SENSE
RESET
GND
GND
TxD
RxD
SEN/STA
2
15
3
14
4
13
TH3122
5
12
6
11
7
10
8
9
Configurable reset time (15ms/100ms) and reset threshold voltage (3.15V / 4.65V)
Low voltage detection at VS
Wake-up by K-BUS traffic and start-up capable independent of EN voltage level
Universal comparator with an input voltage range –24V … 30V and digital output
Load dump protected (40V)
Ordering Information
Part No.
TH3122
Temperature Code
K ( -40ºC to 125ºC )
Package Code
DF ( SOIC16, 300mil )
General Description
The TH3122 consists of a low drop voltage
regulator 5V/100mA and a K-Bus transceiver. The
transceiver is suitable for K-Bus systems conform
to ISO 9141.
The combination of voltage regulator and bus
transceiver in combination with the monitoring
functions make it possible to develop simple, but
powerful and cheap nodes in K-Bus systems.
The wide output current area and the configurable
reset time and reset voltage works together with
many different microcontrollers.
3901003122
Rev 004
Page 1
Dec/04
MELEXIS [ Melexis Microelectronic Systems ]
