MC145010ED

Sensor And Detector Interfaces Overview

The MC145010ED 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, comparators, and alarm logic to detect scattered light from smoke particles. It includes on-chip push-pull drivers for external piezoelectric transducers and supports wired-OR interconnection of up to 40 units via the I/O pin. The component complies with UL217 and UL268 specifications and provides distinct audible and visual indications for local smoke, remote smoke, low-supply conditions, and degraded chamber sensitivity.

Sensor And Detector Interfaces Feature Summary

• Variable-gain photo amplifier with automatic gain selection for standby, local smoke, and test modes
• Integrated push-pull drivers for direct connection to piezoelectric audio transducers
• Wired-OR capability allowing common signaling across interconnected detector units
• Distinct alarm signaling for local smoke, remote smoke, low-supply, and chamber sensitivity degradation

Sensor And Detector Interfaces Applications

• Battery-powered standalone smoke detectors
• Interconnected multi-unit fire alarm systems
• Smoke detection devices requiring UL217 or UL268 compliance

Sensor And Detector Interfaces Procurement Notes

Verify that the ordering suffix ED corresponds to the 16-lead SOICW package (Case No. 751G-04) as specified in the datasheet. Confirm the temperature rating matches the -55 to +125°C range associated with this specific part number variant. Ensure compatibility with the required operating ambient temperature range of -10 to 60°C for standard smoke detector applications.

Sensor And Detector Interfaces Selection Notes

Select this component for designs requiring low-power CMOS smoke detection with integrated alarm driving capabilities. Consider the 16-lead SOICW package constraints and ensure adequate PCB layout practices to minimize noise pickup on high-impedance analog inputs. Verify that the external photodiode and IR emitter components meet the specified bias and leakage requirements for optimal sensitivity calibration.

Sensor And Detector Interfaces Part Context

The MC145010 is part of Freescale Semiconductor's specialized sensor interface family, specifically engineered for photoelectric smoke detection. It replaces discrete analog and digital circuits with a single highly integrated solution. The ED suffix denotes the plastic surface-mount package variant, distinguishing it from the DIP version (P suffix) while maintaining identical electrical functionality and pinout.

Sensor And Detector Interfaces Replacement Considerations

The MC145010DW is the non-lead-free equivalent of the MC145010ED. Both share the same 16-lead SOICW package and electrical characteristics. Substitution requires verification of lead-free compliance requirements if applicable.