The standalone tag reader circuit (STARC) is an integrated
circuit dedicated to the automotive immobilizer applications.
It combines the antenna drivers and demodulator necessary to
interface with a transponder.
A low dropout voltage regulator and a physical interface fully
compatible with the ISO 9141 norm are also available.
The STARC is fabricated with the SMARTMOSTM3.5
technology. This process is a double layer metal 1.4μm
45V technology, combining CMOS and bipolar devices.
• Contactless 125 kHz tag reader module:
– Self synchronous sample and hold demodulator
– Amplitude or phase modulation detection
– High sensitivity
– Fast read after write demodulator settling time
– Low resistance and high current antenna drivers, 2W @
150mA (typ.)
– Bidirectionnal data transmission
– Multi-tag, multi-scheme operation
• Low dropout voltage regulator:
– Wide input supply voltage range from 5.5V up to 40V
– Output current capability up to 150mA DC with an
external power transistor
– 5V output voltage with a ±5% accuracy
– Low voltage reset function
– Low current consumption in standby mode:
– 300μA (typ.)
• ISO 9141 transmitter and receiver module:
– Input voltage thresholds ratiometric to the supply
voltage
– Current limitation
– Output slew rate control
– No external protection device required