RE46C167S16F

Sensor And Detector Interfaces Overview

The RE46C167S16F is a CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology. It operates on a supply voltage of 5V to 12V with typical quiescent current consumption of 4µA at 9V and up to 8µA at 12V. The device supports interconnection of up to 40 detectors, features an internal low battery detection circuit, and includes alarm memory functionality. It utilizes a temporal horn pattern for local alarms and continuous tone for remote alarms. The IC provides sensitivity control times of 1.2 minutes and incorporates I/O filtering and charge dump capabilities.

Sensor And Detector Interfaces Feature Summary

• Supports interconnection of up to 40 detectors via the bidirectional I/O pin
• Includes alarm memory feature to identify units that previously entered a local alarm condition
• Features internal low battery detection and chamber integrity testing every 43 seconds
• Provides high-gain mode for push-button chamber testing

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors complying with UL217 and UL268 specifications
• Multi-unit interconnected fire alarm systems
• Battery-powered residential smoke alarm devices

Sensor And Detector Interfaces Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors or direct channels. Confirm package type availability matches design requirements. Ensure compliance with RoHS lead-free packaging standards. Validate ordering suffixes against official datasheet documentation to confirm specific package and temperature range configurations.

Sensor And Detector Interfaces Selection Notes

Select this model when a 1.2-minute sensitivity control time is required for timer mode operations. Choose the SOIC-16 package variant for surface-mount assembly applications. Consider the RE46C165/6 series if a longer 9-minute timer duration is necessary for the application environment.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C165/6/7/8 family of low-power CMOS photoelectric smoke detector integrated circuits. The RE46C167S16F specifically denotes the surface-mount SOIC-16 package version within this product line designed for standalone or interconnected smoke detection systems.

Sensor And Detector Interfaces Replacement Considerations

RE46C167E16F (PDIP-16 package equivalent)

Sensor And Detector Interfaces FAQ

What is the maximum number of detectors that can be interconnected?

The device supports interconnection of up to 40 detectors in a single system.

How does the alarm memory feature function?

After a local alarm, the unit flashes its LED three times every 43 seconds for up to 24 hours to indicate a previous alarm event.

What is the purpose of the VSEN pin in Timer Mode?

In Timer Mode, the VSEN pin allows the user to set an external smoke comparator reference to modify sensitivity for the duration of the timer period.