MSC now offers the E520.32 programmable smoke detector IC from Elmos Semiconductor, a device that includes all active electronic components of a network capable smoke detector.
The E520.32 combines a configurable 200 mA driver for the transmitter LED, a high impedance input for the voltage conversion to the receiver diode and a 2-wire bus interface. It is equipped with 4 KByte of flash ROM and 32 Byte of EEPROM. In addition to a wide photo input current range of 1.5nA to 45nA, the device also features a low current consumption of only 88 µA.
Fully programmable smoke detector IC with integrated bus interface – [Link]