PT8A2642WE

Sensor And Detector Interfaces Overview

The PT8A2642WE is a CMOS LSI PIR sensor light switch controller manufactured by Diodes Incorporated in a 16-pin SOIC package. 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 provides a relay drive output (active high) suitable for three-wire configurations, alongside an on-chip regulator delivering approximately 3.6V. Key parameters include a system oscillator frequency of 16KHz and an operating temperature range from -20°C to 70°C.

Sensor And Detector Interfaces Feature Summary

• Supports selectable ON, AUTO, and OFF modes via the MODE pin
• Includes adjustable output duration controlled by external RC components
• Features override functionality allowing manual control during operation
• Integrates CDS input for automatic day/night detection

Sensor And Detector Interfaces Applications

• Automatic PIR lamp control systems
• AC 220V/50Hz lighting applications
• AC 110V/60Hz lighting applications
• Three-wire relay-based motion sensor switches

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix 'W' corresponds to the 16-pin SOIC lead-free package when sourcing. Confirm that the component meets RoHS compliance requirements if mandated by your manufacturing standards. Ensure the supplier provides official datasheets matching the PT8A264X series documentation to validate functional specifications.

Sensor And Detector Interfaces Selection Notes

Select this model specifically for applications requiring a relay drive output rather than a triac pulse. It is designed for three-wire configurations where a continuous power supply is available. Consider the 40-second warm-up period and the specific trigger criteria involving sustain duration and frequency when designing the surrounding analog front-end circuitry.

Sensor And Detector Interfaces Part Context

This component belongs to the PT8A2641-2642/2645-2648 family of PIR sensor light switches originally developed by Pericom Semiconductor Corporation, now part of Diodes Incorporated. The family differentiates models based on output type (relay vs. triac) and specific pinout variations for comparator or CDS outputs.

Sensor And Detector Interfaces Replacement Considerations

Direct substitutes within the same family include PT8A2646WE and PT8A2648WE, which also feature relay outputs. Verify pin compatibility and output logic levels before swapping, as other variants like PT8A2641WE provide triac pulses instead.