A5358CA

Overview

The A5358CA is a low-current BiCMOS integrated circuit designed specifically for photoelectric smoke detector applications. It provides all necessary features to interface with optical sensing components, including photodiodes and LEDs. The device operates within a supply voltage range of -0.5 V to 15 V and an input voltage range of -0.3 V to 12 V. It is housed in a 16-pin DIP through-hole package, facilitating easy integration into standard detector assemblies.

Feature Summary

• Integrated solution for photoelectric smoke detection requiring minimal external components
• Optimized for low current consumption to extend battery life in standby mode
• Includes built-in hush functionality for temporary alarm silencing
• Designed for reliable operation across standard automotive and industrial temperature ranges

Applications

• Photoelectric smoke detectors
• Residential fire safety systems
• Commercial building fire alarm panels

Procurement Notes

Verify the specific suffix (e.g., CA) against the manufacturer's official datasheet to confirm pinout compatibility and package type. Ensure the procurement source provides valid traceability documentation. Confirm that the component meets the required environmental standards for the intended deployment location. Cross-reference the ordering part number with the latest Allegro MicroSystems product selection guide to avoid obsolete variants.

Selection Notes

Select this component when designing a photoelectric smoke detection system requiring a dedicated analog front-end IC. It is suitable for applications prioritizing low quiescent current and high reliability. Consider the 16-pin DIP package for prototyping or through-hole manufacturing processes. Evaluate the need for integrated hush control if user interaction features are required in the final product design.

Part Context

Allegro MicroSystems specializes in magnetic sensors and power ICs, but also offers specialized photonics solutions like the A5358 series. This part belongs to their line of dedicated sensor interface circuits tailored for safety-critical monitoring applications. It complements their broader portfolio by addressing specific niche requirements in fire detection technology rather than general-purpose signal processing.

Replacement Considerations

Consult Allegro MicroSystems official substitution lists for direct replacements. Generic equivalents may lack the integrated hush feature or specific biasing characteristics required for accurate photoelectric sensing. Verify pin-to-pin compatibility before attempting any cross-brand substitution.