A5364CA

Overview

The A5364CA is a low-current CMOS integrated circuit designed for ionization-type smoke detectors. It provides complete functionality including an internal oscillator, timing circuitry, and alarm logic to minimize standby power consumption. The device supports networking up to 125 units via its I/O pin for synchronized alarms. It features adjustable sensitivity and low-battery thresholds, active guard outputs to reduce leakage currents, and a piezoelectric horn driver. The component operates within a supply voltage range of 6.0 V to 12.0 V and is rated for continuous operation between 0°C and 50°C.

Feature Summary

• Interconnect capability allows synchronization of up to 125 detector units
• Active guard amplifiers on adjacent pins minimize surface leakage currents
• Internal reverse battery protection safeguards against incorrect polarity
• Built-in hysteresis reduces false triggering from minor signal fluctuations

Applications

• Ionization-type residential smoke alarms
• Commercial fire detection systems requiring UL217 compliance
• Networked safety monitoring installations

Procurement Notes

Verify the specific ordering suffix when purchasing. The standard part number denotes the package type, while the –T suffix indicates a lead-free version with matte tin leadframe plating. Confirm that the selected variant matches the required environmental and regulatory standards for the target assembly process.

Selection Notes

Select this component for applications requiring low average standby current to extend battery life. Ensure the design accommodates the specified operating temperature range of 0°C to 50°C. External resistors are necessary to fine-tune sensitivity and low-battery thresholds according to the specific ionization chamber characteristics used in the final product.

Part Context

This component belongs to Allegro MicroSystems' family of smoke detector ICs. It serves as a specialized solution for ionization sensing, distinct from photoelectric alternatives like the A5366. The device integrates analog front-end processing with digital timing control specifically optimized for safety-critical fire detection environments.

Replacement Considerations

The A5367CA is a related ionization smoke detector IC from the same manufacturer. Verify functional compatibility and pinout alignment before substitution. Note that the A5367CA may have different status classifications regarding new design recommendations.