Smoke-detector ICs have alarm memory
12 July 2010
Microchip has launched the industry’s first Ion and photo smoke-detector ICs to offer alarm memory.
The low-power power RE46C162/3 Ion and RE46C165/6/7/8 (RE46C16X) photo smoke-detector ICs make it easy to quickly determine which detector in an interconnected loop triggered an alarm.
The ICs’ low energy use enables smoke detectors with a battery life of ten years, and an interconnect filter enables a connection to other devices, such as CO detectors.
Homes often have interconnected smoke detectors, to remotely alert the resident about remote smoke events. When an alarm is falsely triggered, known as ‘nuisance tripping,’ it is difficult to determine which smoke detector set off the alarm.
The alarm-memory feature available on the RE46C16X ICs enables the detector that caused the fault to be easily identified, which greatly reduces costs associated with installing and troubleshooting these types of smoke-detector systems. A charge-dump feature allows the alarm on all interconnected devices to stop sooner.
The six members of the RE46C16X IC family are available in 16-pin PDIP and SOIC 150/300 packages.
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