MC145012DWR2

Sensor And Detector Interfaces Overview

The MC145012DWR2 is a CMOS photoelectric smoke detector integrated circuit designed for advanced fire detection systems. It incorporates sophisticated analog and digital circuitry to interface with infrared photoelectric chambers, detecting scattered light from smoke particles or aerosols. The device supports temporal pattern horn drivers and includes on-chip push-pull drivers for external piezoelectric transducers. It operates within a voltage range of 6.0 V to 12 V with an average supply current of 8 µA. The component functions reliably in temperatures between -10°C and 60°C.

Sensor And Detector Interfaces Feature Summary

• Designed to comply with UL217 and UL268 specifications for smoke detector systems
• Supports NFPA 72, ANSI S3.41, and ISO 8201 audible emergency evacuation signals
• Includes I/O pin capability for interconnecting units for common signaling
• Features power-on reset functionality to place the IC in standby mode

Sensor And Detector Interfaces Applications

• Photoelectric smoke detector systems
• Battery-powered fire alarm devices
• Emergency evacuation signal generation

Sensor And Detector Interfaces Procurement Notes

Verify RoHS compliance status as datasheets indicate non-compliance for standard variants. Confirm package type is 16-SOIC. Check manufacturer history as Motorola assets transferred to NXP/Freescale. Ensure operating temperature range matches application requirements of -10°C to 60°C. Validate part number suffixes against current distributor listings.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring low-power CMOS smoke detection with specific temporal pattern output capabilities. It is suitable for battery-operated devices due to its 8 µA average supply current. Ensure the design accommodates the 6.0 V to 12 V operating voltage range. Verify compatibility with infrared photoelectric chamber interfaces and external piezoelectric transducer drivers.

Sensor And Detector Interfaces Part Context

The MC145012 belongs to the MC145000 series of specialized analog-digital mixed-signal ICs. It is functionally related to other smoke detector components like the MC145010 but offers distinct temporal pattern driving features. The DWR2 suffix indicates a surface-mount SOIC-16 package variant produced under Motorola or subsequent NXP/Freescale manufacturing lines.

Sensor And Detector Interfaces Replacement Considerations

MC145012DW: Identical functional specification in standard SOIC-16 packaging without the R2 suffix.