PT8A263PE

Sensor And Detector Interfaces Overview

The PT8A263PE is a mixed-signal CMOS LSI chip designed for PIR alarm control systems. It operates at a supply voltage of 4.75V to 6.0V with a typical quiescent current of 70µA and system oscillator frequency of 16kHz. The device features an internal low battery detector threshold of approximately 3.8V, a 3.6V regulator output on the VEE pin, and two operational amplifiers for signal filtering. It provides four selectable operation modes via SEL1 and SEL2 pins, driving outputs OUT1 and OUT2 to trigger external devices such as buzzers or doorbell ICs.

Sensor And Detector Interfaces Feature Summary

• Integrated dual-stage operational amplifier for analog front-end filtering
• Built-in noise rejection circuit for valid trigger qualification
• Internal low battery detection with system halt capability
• Four distinct operation modes configurable via hardware selection pins

Sensor And Detector Interfaces Applications

• Low cost security system sensor components
• Motion sensor applications driving speech chips for alarm alerts
• Door chime applications utilizing external doorbell ICs

Sensor And Detector Interfaces Procurement Notes

Verify component authenticity through authorized Diodes Incorporated channels. Confirm package type matches DIP-16 or SOIC-16 requirements. Ensure ordering suffixes align with specific tape/reel or tube packaging needs. Validate that the selected variant meets environmental specifications for intended deployment conditions.

Sensor And Detector Interfaces Selection Notes

Select based on required operational mode configuration using SEL1 and SEL2 pins. Consider package preference between lead-free DIP-16 and SOIC-16 formats. Verify compatibility with external PIR sensor interfaces connected to OP1P and OP1N inputs. Ensure power supply constraints align with the specified 4.75V to 6.0V operating range.

Sensor And Detector Interfaces Part Context

This component belongs to the PT8A26x series of PIR alarm controllers manufactured by Pericom Semiconductor Corporation, now part of Diodes Incorporated. It shares architectural similarities with the PT8A261 but includes additional integrated features like the low battery detector and multiple output drive capabilities for versatile alarm system implementations.

Sensor And Detector Interfaces Replacement Considerations

PT8A261 serves as a foundational predecessor in the same product family. Direct substitution requires verification of functional differences regarding low battery detection and multi-mode output configurations.

Sensor And Detector Interfaces FAQ

How does the device handle low battery conditions?

The internal low battery detector triggers when VCC drops below approximately 3.8V, halting most internal circuits while maintaining oscillator and LED indication functions.

What determines the system oscillator frequency?

The system frequency is generated by connecting an external resistor and capacitor to the OSC pin, typically set to 16kHz for standard applications.

How are the four operation modes selected?

Modes are configured by setting logic levels on the SEL1 and SEL2 pins, enabling Normal Alarm, Normal Alarm with Delay, Siren Alarm, or Door Chime functionality.