The IC E520.24 provides two high current driver for a transmitter LED and a high impedance I-V conversion for the current of the photo diode. Optimized response of both amplifier and ADC allow short transmitter pulses while... read more


  • 2-Wire bus operation with 8V to 50V supply, low supply current down to 90µA
  • Embedded 8-bit µC with 4kByte or 8kByte
  • Instruction Memory and 128Byte RAM 48Byte MTP with 32Byte uncommitted for configuration data + 16 Byte for device ID and calibration
  • 2 configurable 420mA LED driver
  • Photo current input range (1.5 .. 45)nA
  • Thermistor input


Document Description Type
Info Sheet PDF 224 kB

Application diagram


  • Simplifies design of addressable smoke detectors required by legislation
  • Fully programmable smoke detectors
  • Device with GPIOs and LN24 bus interface
  • Alarm Switch Controller

Order Information

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Part No. Temp. Range Package Order No.
E520.24 -40°C to +85°C SOIC16 E52024A67E 
E520.24  -40°C to +85°C  Bare-Die E52024Axxx 


Part No. Description Board type Order No.
E520.24 Universal Smoke Detector Controller  Demoboard K52024-0001
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