A5366CA

Overview

The A5366CA is a low-current BiCMOS integrated circuit designed for photoelectric smoke detectors. It operates on a 6 V to 12 V supply and features an internal variable-gain photoamplifier, oscillator, and timing circuits. The device supports interconnecting up to 50 units via the I/O pin. It includes dedicated outputs for driving piezoelectric horns and visible LEDs, along with inputs for push-to-test and hush timer functions. The component is housed in a 16-pin dual in-line plastic package (Package A) and is rated for continuous operation between –25°C and 75°C.

Feature Summary

• Supports networking of up to 50 interconnected detectors
• Includes built-in low battery detection and chamber sensitivity monitoring
• Features a three-stage speedup sensing scheme to minimize false triggering
• Provides temporal horn pattern output compliant with UL217 and NFPA72

Applications

• Photoelectric smoke alarm systems
• Interconnected fire detection networks
• Stand-alone residential smoke alarms

Procurement Notes

Verify the specific suffix 'A' corresponds to the 16-pin DIP package configuration required for your design. Confirm lead-free status if environmental compliance is mandatory, as standard versions may differ from Pb-free variants. Ensure the operating temperature range meets your application's environmental requirements before finalizing procurement.

Selection Notes

Select this component when designing photoelectric smoke detectors requiring integrated horn driving and networking capabilities. Verify that the external photochamber and photodiode specifications align with the device's input requirements. Consider the 16-pin DIP package constraints for PCB layout and ensure adequate thermal management within the specified operating temperature range.

Part Context

The A5366CA belongs to the Allegro MicroSystems A5366 series of smoke detector ICs. This family provides comprehensive solutions for both ionization and photoelectric smoke detection applications. The A5366 variant specifically targets photoelectric chambers, offering integrated signal processing and alarm generation features to simplify detector design.

Replacement Considerations

The A5366CLWTR-T serves as a surface mount alternative using the SOICW package. Verify package compatibility and pinout alignment before substitution. Consult official documentation for any functional differences between through-hole and surface mount variants.