MC145011P Photoelectric Smoke Detector IC | NXP
部品番号: MC145011P ✗ 生産終了MC145011P 概要
A photoelectric smoke detector IC is a specialized interface circuit that connects an optical sensing chamber to the rest of an alarm system. Its internal analog and digital sections condition the chamber signal, evaluate smoke-related conditions, and support low-power operation. In the broader device hierarchy, the MC145011P belongs to sensor and detector interface ICs, connecting a physical sensing element to a line-powered embedded alarm system.
The principal feature is the CMOS implementation described for the MC145011 family, combining analog signal processing with digital control while emphasizing low power consumption. The IC is intended to operate with an infrared photoelectric chamber rather than relying on a purely ionization-based sensing arrangement. Its I/O capability allows the detector assembly to participate in system signaling and alarm-state control without requiring every function to be implemented by a separate microcontroller.
The MC145011 family architecture is intended for compact, battery-conscious alarm products. Low-power operation is particularly important because residential smoke alarms are expected to remain installed for years and often derive operating energy from a line-connected alarm circuit. The integrated analog and digital circuitry reduces the external support circuitry required for optical chamber signal conditioning, threshold evaluation, and system interfacing.
Typical applications include residential photoelectric smoke alarms, commercial alarm panels, and other line-powered fire-detection products. A typical design places the MC145011P beside an infrared photoelectric chamber, connects the chamber elements and required timing or filtering components, and uses the I/O interface to communicate with the alarm system. Exact component values, operating limits, timing thresholds, and test points should be selected from the manufacturer application guidance rather than inferred from general smoke-detector practice.
Designers should preserve the pin assignment and layout architecture of the original MC145011P design when reusing an existing printed circuit board. The 16-pin plastic DIP package facilitates through-hole assembly and inspection, but its larger footprint differs from modern surface-mount detector-controller packages. Validate chamber sensitivity, alarm thresholds, startup behavior, standby current, and regulatory performance on the final mechanical and optical assembly.
This product page combines the identified package and application characteristics with practical guidance for smoke-alarm integration. It also distinguishes the verified MC145011P identity from unconfirmed replacement devices, helping engineers decide when an existing footprint can be reused and when a redesigned detector interface is required.
ドロップイン代替品: MC145011P — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストMC145011P 仕様
| Product Type | Photoelectric smoke detector IC |
| Manufacturer | NXP Semiconductors |
| Process Technology | CMOS |
| Sensor Interface | Infrared photoelectric chamber |
| Application | Line-powered smoke detector |
| I/O Function | Yes |
| パッケージ | 16-pin plastic DIP (16-PDIP) |
| ピン数 | 16 pins |
| 実装タイプ | Through-hole |
| Temperature Grade | Commercial |
MC145011P 16-pin plastic dip (16-pdip) ピン配置ガイド
MC145011P (16-pin plastic dip (16-pdip) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MC145011P.
詳細は データシート をご参照ください。
主な用途
MC145011P の用途: 6 件s: Residential Photoelectric Smoke Alarm, Commercial Fire-Alarm Detection Module, Line-Powered Alarm Control Module, Photoelectric Alarm Retrofit Board, Industrial Smoke-Detection Controller, Legacy Alarm-System Maintenance.
Residential Photoelectric Smoke Alarm
The MC145011P fits a residential photoelectric alarm because it combines CMOS analog and digital circuitry for an infrared photoelectric chamber in a low-power line-powered product. The I/O function supports integration with the alarm system while avoiding a separate controller for basic chamber conditioning and alarm-state handling. Designers should preserve the manufacturer application circuit because chamber geometry, resistor settings, and timing strongly affect smoke sensitivity. The 16-PDIP package is also practical for through-hole assembly, but long-term sourcing and final-product validation must account for the device’s obsolete status.
おすすめ
Commercial Fire-Alarm Detection Module
A commercial alarm module can use the MC145011P as the photoelectric sensing interface for a line-powered detector node. Its integrated analog and digital circuitry is intended to process an infrared optical chamber and provide an I/O connection to surrounding alarm electronics. This application requires careful separation between alarm signaling and safety-critical functions, followed by verification of chamber response, startup behavior, and fault conditions. The through-hole 16-PDIP package simplifies inspection and repair but occupies more board area than a modern surface-mount detector controller.
おすすめ
Line-Powered Alarm Control Module
The MC145011P can be used in a line-powered alarm-control module that must interpret a photoelectric chamber signal and connect the detector to a larger alarm system. Its low-power CMOS analog and digital circuitry is suitable for continuously installed equipment, while the I/O function simplifies status communication with the alarm electronics. The implementation should follow the manufacturer reference circuit and account for startup delays, chamber signal thresholds, and output behavior. For new alarm platforms, verify whether an obsolete interface IC can meet the required lifecycle and certification commitments.
おすすめ
Photoelectric Alarm Retrofit Board
The MC145011P is suitable for a retrofit board intended to reproduce an existing photoelectric alarm design with minimal architectural changes. Its 16-PDIP package and established smoke-detector function allow a board-level design to remain close to the original application schematic, which is useful when the enclosure, optical chamber, and wiring are already fixed. Engineers must still verify the pinout, electrical limits, and component values against the manufacturer datasheet. A modern replacement cannot be selected solely by comparing detector functions because terminal compatibility and alarm behavior must also match.
おすすめ
Industrial Smoke-Detection Controller
The MC145011P may serve in an industrial smoke-detection controller that uses an infrared photoelectric chamber and requires a dedicated low-power interface circuit. The IC’s analog and digital sections support chamber signal processing, and its I/O function can link the sensing stage to system-level control or indication circuitry. Because industrial installations can impose temperature, humidity, vibration, and long-life requirements, the device should not be selected without confirming the manufacturer’s operating limits. The obsolete lifecycle status makes a new currently supported controller the more sustainable choice when redesign is permitted.
おすすめ
Legacy Alarm-System Maintenance
The MC145011P is particularly relevant to maintenance of legacy line-powered alarm systems where replacing an existing detector interface without changing the board layout is essential. The through-hole 16-PDIP package is convenient for repair boards and prototype assemblies, and the known family function allows a qualified technician to focus on the original application circuit. Before ordering, compare the complete suffix, pinout, and electrical characteristics with the installed device. For volume production, evaluate obsolescence risk and consider a redesign to a supported controller if long-term continuity is required.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC145011P — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Product Type | Photoelectric smoke detector IC |
| Brand | NXP Semiconductors |
| Package | 16-PDIP |
| Pin Count | 16 pins |
| Process Technology | CMOS |
| Sensor Type | Infrared photoelectric chamber |
| I/O Function | Yes |
| Target Application | Line-powered smoke detector |
| Temperature Grade | Commercial |
| Mounting Type | Through-hole |
主な差別化要因
- Purpose-built photoelectric detector interface （vs MC14538BDTR2G)
- Integrated low-power analog and digital circuitry （vs General-purpose logic implementation)
- System-level I/O integration （vs MC14538BDTR2G)
設計ノート
Preserve the manufacturer’s application schematic and pin arrangement when laying out a replacement board. Connect the infrared photoelectric chamber, external timing components, and I/O path according to the datasheet rather than inferring connections from the 16-pin count. Check pin 1 orientation against the physical package drawing, maintain the required lead pitch, and inspect every solder joint because the through-hole architecture is particularly important in long-life alarm products.
Design the line-powered supply and detector interface around the manufacturer’s startup, standby-current, and operating-voltage requirements. Keep the power and I/O routing separated from sensitive chamber connections, and use the recommended bypassing arrangement close to the IC. Validate the circuit at nominal line conditions and across the full expected input range so that detector sensitivity and alarm behavior remain stable.
Do not substitute MC14538BDTR2G or another smoke-detector IC solely because its description sounds similar. A drop-in decision requires the same 16-pin package, matching terminal functions, and equivalent electrical behavior. MC145011P is obsolete, so also confirm the lifecycle status, remaining factory stock, date-code requirements, and long-term availability before committing a new production design to this device.
Keep the infrared photoelectric chamber and its high-impedance signal paths physically separated from noisy power and switching nodes. Follow the manufacturer’s recommended grounding and component placement, because excessive trace length or coupling can change the chamber signal presented to the analog section. Validate sensitivity and false-alarm behavior in the final enclosure because PCB routing, chamber geometry, and airflow interact and cannot be evaluated independently.
コンプライアンス情報
The component is a commercial-grade photoelectric smoke detector interface IC. Specific environmental and substance declarations were not stated in the accessible product records and must be confirmed for the exact manufacturer package and orderable suffix.
