MC145010P

Sensor And Detector Interfaces Overview

The MC145010P is a CMOS photoelectric smoke detector IC designed for battery-powered applications. It operates within a supply voltage range of 6 to 12 V and features an average standby supply current of 12 µA. The device integrates variable-gain photo amplifiers, oscillators, and push-pull drivers for piezoelectric transducers. It supports wired-OR interconnection of up to 40 units via the I/O pin and includes low-supply detection with distinct alarm signaling. The component complies with UL217 and UL268 specifications and is housed in a 16-lead plastic DIP package.

Sensor And Detector Interfaces Feature Summary

• Variable-gain photo amplifier with automatic gain selection based on operational mode
• Integrated push-pull drivers for direct connection to external piezoelectric transducers
• Wired-OR capability allowing common signaling across multiple interconnected units
• Distinct audible and visual alarm patterns for local smoke, remote smoke, and low-supply conditions

Sensor And Detector Interfaces Applications

• Battery-powered standalone smoke detectors
• Interconnected multi-unit fire alarm systems
• Building automation safety monitoring

Sensor And Detector Interfaces Procurement Notes

Verify that the specific part number suffix matches the required package type, as the datasheet lists both Plastic DIP (P suffix) and SOICW (DW/EG suffix) options. Confirm the operating temperature range requirements against the standard -10 to 60 °C specification or the extended -55 to +125 °C variant if available. Ensure compatibility with existing circuit designs regarding the 6 to 12 V supply voltage constraints.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring low-power photoelectric smoke detection with integrated signal processing. The device eliminates the need for external microcontrollers by handling analog amplification, timing, and alarm logic internally. Consider the 16-lead DIP package for through-hole assembly or verify availability of surface-mount variants if PCB space is constrained. Ensure external components like capacitors C1 and C2 are selected to set the appropriate gain levels for the specific smoke chamber design.

Sensor And Detector Interfaces Part Context

The MC145010 is a specialized analog-digital mixed-signal IC manufactured originally by Freescale Semiconductor, now part of NXP Semiconductors. It belongs to the family of dedicated sensor interface controllers designed specifically for fire safety applications. Unlike general-purpose microcontrollers, it provides fixed-function hardware for smoke detection logic, reducing system complexity and development time for compliance-critical devices.

Sensor And Detector Interfaces Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.