A5367CA

Overview

The A5367CA is a low-current BiCMOS integrated circuit designed for ionization-type smoke detectors. It operates on a single supply voltage ranging from 6.0 V to 12.0 V, with a typical standby current of 5.0 μA at 9.0 V. The device features an internal oscillator that powers the circuit for 10 ms every 1.67 seconds to check for smoke. It supports networking up to 125 units via an I/O pin and includes a piezoelectric horn driver outputting up to 16 mA. Sensitivity and low-battery thresholds are adjustable via external resistors on dedicated pins.

Feature Summary

• Interconnect capability allows linking up to 125 detectors for synchronized alarm signaling
• Built-in timer mode enables reduced sensitivity periods to minimize nuisance alarms
• Active guard amplifiers on detector input pins reduce surface leakage currents
• Compliant with UL217 and NFPA72 temporal horn patterns for audible alerts

Applications

• Residential ionization smoke alarms
• Commercial fire detection systems
• Battery-operated safety and security devices

Procurement Notes

Verify component authenticity through authorized Allegro MicroSystems distributors or certified partners. Confirm the specific ordering suffix matches the required lead-free (Pb-Free) specification. Review the latest datasheet revision to ensure alignment with current manufacturing standards and UL recognition requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring ultra-low standby power consumption in battery-operated environments. Ensure the design accommodates the 16-pin DIP package constraints and the –10°C to 60°C operating temperature range. External components such as timing resistors and oscillator capacitors must be selected to meet precise electrical characteristics defined in the datasheet.

Part Context

The A5367CA belongs to the A5367 series of ionization smoke detector ICs manufactured by Allegro MicroSystems. This series provides comprehensive signal processing and control functions specifically tailored for residential and commercial fire safety applications utilizing ionization chambers.

Replacement Considerations

No direct public substitute part numbers are documented. Verify compatibility with existing PCB layouts and external component values if considering alternative smoke detector ICs from other manufacturers.