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U6268B

TEMIC Semiconductors
Part Number U6268B
Manufacturer TEMIC Semiconductors
Description Side-Airbag Sensor Dual Interface
Published Apr 16, 2005
Detailed Description U6268B Side-Airbag Sensor Dual Interface Description The U6268B is an interface IC for remote automotive sensors. It lin...
Datasheet PDF File U6268B PDF File

U6268B
U6268B

Overview
U6268B Side-Airbag Sensor Dual Interface Description The U6268B is an interface IC for remote automotive sensors.
It links the crash sensors in the driver- and passenger door with the main airbag unit in the dashboard.
Two identical channels supply the external sensors and receive digital information from them via one active wire each.
The interface supplies the external sensors with a pre-regulated smoothed voltage, the external units transmit the digital information back to the interface by current modulation.
As the device is for safety critical applications, highest data transmission security is mandatory.
With high immunity against cross-coupling between the two channels, the U6228B is tailored for the harsh automotive environment.
Features D Two identical interface channels D Provides a pre-regulated smoothed voltage and a supply current up to 50 mA for the sensors D TTL-compatible input activate the sensor D Data output can be directly connected to a microcontroller input D Receives data from the sensors by current modulation with a transmission rate of 60 kBaud (transmission bandwidth 500 kHz) D Operation supply voltage range 5.
7 V method 3015.
7 v V v 40 V S D ESD protection according to MIL-STD-883C test D High-level EMI protection D Current modulation provides high noise immunity for data transfer Benefits D Voltage supply and data transmission with one active wire over long distances Ordering Information Extended Type Number U6268B Package SO16 Remarks Block Diagram Data Channel 1 Enable Voltage comparator I/U converter Smoothed voltage regulator Channel 1 power supply Data trans– mission Crash sensor µC Enable Channel 2 Data Channel 1 Channel 2 Temperature monitor Short circuit detection Channel 2 power supply Data trans– mission Smoothed voltage regulator Voltage comparator I/U converter Crash sensor 13839 Figure 1.
Block diagram TELEFUNKEN Semiconductors Rev.
A1, 21-May-97 1 (12) Preliminary Information U6268B Pin Description Pin 1...


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