U2481B

` Extremely low comparator thresholds of typically 3.5 mV
` Internal compensation for copper shunts
` Internal compensation for voltage-dependent bulb characteristic
` Comparator input voltage may exceed supply voltage
` Internal protection measures for pulses according to ISO TR 7637/1
` ESD according to MIL-SID-883 C test method 3015.7
    Human body model: 4 kV
    Machine model: 200 V
    EMI protection (TEM cell up to 100 V/m) 

Both ICs can be used in any kind of vehicle with a 12 V supply. It is sufficient to insert small resistors into the lamp wiring and to provide the dashboard instrument cluster with a pilot lamp. These ICs increase the safety and add comfort features.

The U2481B and the U2482B multicomparator circuits are designed to monitor automotive illumination by sensing the voltage drop across shunt resistors. Provided with extremely low comparator thresholds, these ICs can be used together as a chip set to build an entire lamp monitor system. Single operation of both circuits is also possible.

As a special feature for brake lamp monitoring, the U2481B contains a latch stage connected to one of its triple comparators.

With
4 single comparators
1 double comparator and
2 triple comparators

each of the integrated circuits U2481B monitors up to 12 lamps and up to 6 fuses.All comparator stages are combined together to control the common output stage.