PT8A2646WEX

Sensor And Detector Interfaces Overview

The PT8A2646WEX is a CMOS LSI PIR sensor light switch controller manufactured by Diodes Incorporated. It operates at a typical voltage of 5V with an average supply current of 120µA. The device features a two-stage operational amplifier for signal filtering and includes a built-in noise rejection circuit. It supports AC 220V/50Hz and 110V/60Hz applications, providing a relay drive output to control lighting loads. Key electrical parameters include a system oscillator frequency of 16KHz and a regulated VEE output of approximately 3.6V.

Sensor And Detector Interfaces Feature Summary

• Supports selectable operating modes (ON/AUTO/OFF) via the MODE pin
• Includes adjustable output duration controlled by external RC components
• Features override functionality allowing manual switching between modes
• Integrates a zero-crossing detector for AC line synchronization

Sensor And Detector Interfaces Applications

• Automatic PIR lamp control systems
• AC 220V/50Hz lighting fixtures
• AC 110V/60Hz lighting fixtures
• Three-wire configuration relay driver circuits

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix 'WEX' against official documentation to confirm package type and reel specifications. Ensure compatibility with the required AC line frequency and load power ratings before procurement. Confirm availability status as some variants may require direct contact with the manufacturer.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring automatic motion-sensing light control with relay outputs. Consider the PT8A2641 or PT8A2645 if triac-based two-wire configurations are preferred instead of relay drivers. Evaluate the need for override functions and adjustable timing ranges when designing the external RC network.

Sensor And Detector Interfaces Part Context

This part belongs to the PT8A264X series of PIR sensor light switches. The series includes variants like PT8A2641, PT8A2642, PT8A2645, and PT8A2648, which differ primarily in their output types (triac vs. relay) and specific pin configurations for different application requirements.

Sensor And Detector Interfaces Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Designers should consult the manufacturer for potential replacements or verify compatibility with existing circuit designs if substituting.