PT8A261PE

Sensor And Detector Interfaces Overview

The PT8A261PE is a mixed-signal CMOS LSI designed for automatic lamp control using PIR sensors. It operates at 5V with an 80 µA standby current and supports AC 220V/50Hz or 110V/60Hz synchronization. The device features a built-in regulator, noise rejection circuit, and two-stage operational amplifier filter. It provides pulse output for TRIAC drive (PT8A261) or level output for relay drive (PT8A262). Key parameters include a system oscillator frequency of 16kHz, a 40-second warm-up period, and adjustable output on-time duration via external RC components.

Sensor And Detector Interfaces Feature Summary

• Integrated noise rejection and voltage regulation for stable operation across temperature ranges
• Selectable ON/AUTO/OFF modes with override functionality for manual control
• CDS input capability to distinguish day and night conditions for energy saving
• Adjustable output timing duration controlled by external oscillator components

Sensor And Detector Interfaces Applications

• Energy-saving automatic switches for gardens, kitchens, bathrooms, corridors, storage areas, and yards
• Automatic lighting systems in meeting rooms
• Two-wire configuration applications requiring TRIAC-based load control
• Three-wire configuration applications utilizing relay-driven loads

Sensor And Detector Interfaces Procurement Notes

Verify the specific package variant against the datasheet ordering information. The 'P' suffix indicates a DIP-16 package. Confirm that the component matches the required application type, as the PT8A261 provides TRIAC pulse outputs while the PT8A262 provides relay level outputs. Ensure the selected part number aligns with the intended hardware interface requirements.

Sensor And Detector Interfaces Selection Notes

Select the PT8A261PE for circuits requiring direct TRIAC driving through pulse outputs. Choose this model when designing two-wire configurations where low standby current is critical. Verify compatibility with the target AC line voltage (110V or 220V) and frequency (50Hz or 60Hz). Consider the external RC network requirements for setting the desired light-on duration and system clock stability.

Sensor And Detector Interfaces Part Context

This component belongs to the PT8A261/262 family of PIR sensor light switch controllers manufactured by Diodes Incorporated (formerly Pericom Semiconductor). The series includes variants optimized for either TRIAC or relay output interfaces. These devices are engineered specifically for motion-sensing lighting automation, integrating signal processing and power control logic into a single mixed-signal chip.

Sensor And Detector Interfaces Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and functional compatibility if considering alternative manufacturers for PIR sensor controller ICs.