When a fire breaks out, smoke detectors provide the earliest warning for occupants. For manufacturers, these safety devices must balance several priorities at once. Smoke alarms are manufactured in large volumes, where reliability, regulatory compliance and cost efficiency are all equally important.
Here, Ross Turnbull, Director of Business Development at Swindon Silicon Systems, outlines why custom integrated circuits (ICs) can offer a strong commercial advantage in smoke detection.
The UK Government’s Fire Kills campaign highlights the continued importance of fire detection in the home. Each year in England, around 200 people lose their lives to house fires, underlining why fire safety remains a national concern.
The campaign also draws attention to an important limitation that shapes how smoke alarms are installed and designed. According to the campaign, “in more than one third of home fires, smoke does not reach an alarm in time to raise the alert”. For that reason, households are encouraged to install multiple single alarms throughout the home, or even better, adopt interconnected systems that ensure every alarm sounds when one is triggered.
Sensor safety
The Fire Kills campaign also highlights that effective sensor safety is not only about sensing technology, but whether occupants receive an alert early enough to react. In many cases this becomes a matter of coverage.
For smoke detector manufacturers, the commercial impact of this is significant. Improving coverage often means installing more units within a property and creates expectations that devices will behave consistently when linked together. Products must maintain reliability and predictable performance over many years of service.
Nuisance alarms represent one of the clearest points where safety considerations and product economics meet. False alerts are frequently caused by cooking fumes, shower steam or household aerosols. When nuisance alarms happen too frequently, consumers may switch the detector off altogether, so limiting these unnecessary alerts while also ensuring the product works as intended remains a key design challenge for manufacturers.
Connected safety
Interlinked and connected alarms are a direct response to the coverage issue. Regulation is already reinforcing this approach in parts of the UK. In Scotland, legislation requires homes to have interlinked smoke and heat alarms. As a result, interconnected detection is increasingly viewed as a standard requirement rather than an optional feature.
Connected systems also change how product performance is assessed from a commercial perspective. Multi-device networks must demonstrate consistent operation across all units, resistance to nuisance triggers and reliable fault reporting over time. This places greater emphasis on low power operation and dependable self-monitoring.
However, connectivity also introduces additional design complexity. If each connectivity option demands different electronics and a separate validation process, manufacturers can quickly face rising development costs and production risk. Platform-based approaches therefore become desirable, allowing a product family to scale across several variants without requiring entirely different hardware designs.
The ASIC solution
This is where ASICs can play an important role. An ASIC is a custom integrated circuit (IC), designed to perform a defined set of functions as efficiently as possible.
ASICs do not change the fundamental physics of smoke detection, and they do not increase coverage on their own. However, they can reduce unnecessary cost and complexity when building compliant smoke alarms at scale. In a market characterised by high volumes and tight margins, this can make a meaningful difference.
By integrating elements such as the optical front end, LED drivers and analogue to digital converter (ADC) onto a single silicon die, an ASIC can replace several discrete components with one qualified device. This reduces the number of placements and solder joints on the circuit board, lowers board area requirements and simplifies the supply chain. It can also support very low power operation, helping extend battery life without the need for larger cells. Manufacturers can therefore maintain a stable bill of materials even as new features are introduced.
Global fire alarm deployments are estimated to exceed 72 million units each year. At this scale, even small reductions in component count or testing time can make a meaningful difference to production efficiency and cost. At the same time, manufacturers face mounting complexity across components, testing, calibration and aftersales support. ASICs therefore serve as a commercial enabler, supporting scalable platforms that deliver consistent performance while meeting market price expectations.
