PT8A2621PE

Sensor And Detector Interfaces Overview

The PT8A2621PE is a low-power mixed-signal CMOS LSI designed for automatic lamp control using PIR sensors. It features an on-chip regulator and operates at 5V with a standby current of 80µA. The device provides a level output suitable for relay drive, distinguishing it from the pulse-output PT8A2611. Key specifications include a system oscillator frequency of 16kHz, a maximum supply voltage of 7.4V, and an operating temperature range of -25°C to 70°C. It supports AC synchronization for 220V/50Hz and 110V/60Hz systems.

Sensor And Detector Interfaces Feature Summary

• Includes override function allowing mode switching via power switch toggling
• Provides synchronous operation with standard AC line frequencies
• Features built-in noise rejection circuitry and two-stage operational amplifier filtering
• Supports adjustable output duration and selectable ON/AUTO/OFF modes

Sensor And Detector Interfaces Applications

• Energy-saving automatic switches for gardens, kitchens, bathrooms, corridors, storage areas, or yards
• Automatic lighting control in meeting rooms

Sensor And Detector Interfaces Procurement Notes

Verify the ordering suffix 'E' indicates Pb-free compliance as per manufacturer documentation. Confirm package type matches design requirements, as the component is available in 16-pin DIP and 16-pin SOP formats. Ensure application circuits align with the specific relay drive configuration required for this model variant.

Sensor And Detector Interfaces Selection Notes

Select the PT8A2621PE when a level output signal is required to drive external relays, rather than direct TRIAC control. This model is appropriate for applications requiring the specific override functionality accessible by double-switching the power within three seconds. Verify that the 5V operating voltage and 80µA standby current meet the system's power constraints.

Sensor And Detector Interfaces Part Context

The PT8A2621 is part of the PT8A2611/2621 series manufactured by Diodes Incorporated (formerly Pericom). While sharing core PIR detection and filtering capabilities with the PT8A2611, it is distinguished by its relay-compatible level output and dedicated override control logic. Both devices utilize identical pinouts for oscillator and sensor inputs but differ in output stage architecture.

Sensor And Detector Interfaces Replacement Considerations

The PT8A2611 serves as a functional alternative if the application utilizes a TRIAC instead of a relay. Designers must account for the difference between the PT8A2621's level output and the PT8A2611's pulse output when substituting components.