RE46C121E16F

Sensor And Detector Interfaces Overview

The RE46C121E16F is a CMOS ionization smoke detector ASIC designed for low-power applications. It operates on a supply voltage range of 6V to 12V with typical quiescent current consumption below 6.5uA at 9V. The device features an internal oscillator that powers the detection circuitry for 10.5mS every 1.67 seconds in standby, reducing power usage. It supports temporal horn patterns compliant with NFPA 72 standards and includes interconnect capability for up to 40 detectors. Key electrical parameters include a low battery detection threshold of 7.2V to 7.8V and guard amplifier offset voltages within ±50mV.

Sensor And Detector Interfaces Feature Summary

• Internal reverse battery protection and low battery detection mechanisms
• Interconnect functionality supporting up to 40 interconnected units
• Guard outputs for ion detector input with minimal leakage
• ESD protection on all pins

Sensor And Detector Interfaces Applications

• Ionization type smoke detectors
• Security applications requiring low power consumption
• Systems complying with UL217 and UL268 specifications

Sensor And Detector Interfaces Procurement Notes

Verify component authenticity through authorized Microchip distributors or official channels. Confirm RoHS compliance status if required by specific regional regulations. Ensure proper ESD handling procedures are followed during storage and assembly to prevent damage from static electrical charges. Check datasheet revision history for any updates to absolute maximum ratings or electrical characteristics before finalizing procurement plans.

Sensor And Detector Interfaces Selection Notes

Select this IC for designs requiring ionization smoke detection with minimal standby current. Consider the PDIP-16 package availability when choosing between RE46C121 variants. Evaluate external component tolerances for RBIAS and OSCAP to ensure oscillator accuracy. Verify compatibility with existing horn drivers and LED requirements based on output voltage levels specified in the DC electrical characteristics.

Sensor And Detector Interfaces Part Context

The RE46C121 belongs to the R&E International family of smoke detector ASICs, now part of Microchip Technology. It is specifically engineered for ionization chambers, offering integrated sensing, timing, and alarm generation. Unlike photoelectric counterparts, it detects visible smoke particles using ionization principles. The device simplifies design by integrating comparator functions and guard amplifiers directly onto the silicon die.

Sensor And Detector Interfaces Replacement Considerations

The RE46C120 is recognized by Underwriters Laboratories for similar smoke detector applications. While functionally related, verify pinout compatibility and specific electrical parameter overlaps before substitution. No other direct cross-model replacements are documented in the provided source material.