CXSD2211是一款低功耗、低压光电式感烟探测器IC。与最小的外部组件，该电路将提供光电类型所需的所有功能烟雾探测器。每86秒检查一次电池电量是否不足，然后检查燃烧室
待机时，每43秒测试一次完整性。颞角模式支持NFPA 72紧急疏散信号。CXSD2211包含一个增益可选择的光放大器，用于红外发射器/探测器一个内部振荡器每10秒向烟雾探测电路供电一次，以保持待机状态电流最小。如果感测到烟雾，则增加检测率以验证警报状态。高增益模式可用于按钮室测试。内部9分钟定时器可用于降低灵敏度模式。一个互连引脚允许连接多个探测器这样，当一个单元报警时，所有单元都会发出声音。CXSD2211设计用于符合保险商实验室的烟雾探测器规格UL217和UL268
低静态电流消耗
两节AA电池运行
内部通电复位
本地报警存储器
内部低电量探测器
连接多达40个探测器
灵敏度控制9分钟计时器
暂时性或连续性喇叭状
低电池和腔室测试
内部红外发射二极管（IRED）驱动器
可调IRED驱动电流
可调静音灵敏度
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[ CXSD2211 ]
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
The CXSD2211 is a low power, low voltage photoelectric type smoke detector IC. With
minimal external components, this circuit will provide all the required features for a photoelectric-type
smoke detector.A check for a low battery condition is performed every 86 seconds, and chamber
integrity is tested once every 43 seconds, when in Standby. The temporal horn pattern supports the
NFPA 72 emergency evacuation signal.
The CXSD2211 incorporates a gain-selectable photo amplifier for use with an infrared emitter/detector
pair.An internal oscillator strobes power to the smoke detection circuitry every 10 seconds, to keep the standby
current to a minimum. If smoke is sensed, the detection rate is increased to verify
an Alarm condition. A high gain mode is available for push button chamber testing.An internal 9 minute
timer can be used for a Reduced Sensitivity mode.An interconnect pin allows multiple detectors to be connected
such that, when one unit alarms, all units will sound.
the CXSD2211 was designed for use in smoke detectors that comply with Underwriters Laboratory
Specification UL217 and UL268
二.产品特点
Low Quiescent Current Consumption
Two AA Battery Operation
Internal Power On Reset
Local Alarm Memory
Internal Low Battery detector
Interconnect up to 40 Detectors
9 minute Timer for Sensitivity Control
Temporal or Continuous Horn Pattern
Low Battery and Chamber Test
Internal Infrared Emitter Diode (IRED) driver
Adjustable IRED Drive current
Adjustable Hush Sensitivity
Available in SOP16
三.应用范围
光电烟雾检测电路
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
| 烟雾检测电路(Smoke Detector) | ||||||
| Part No. | Features | Hush | Output Signal | Standby Current | UL Certified | Package |
| CXSD2209 | Photoelectric Type With I/O | N/A | Continuous Alarm | 10μA | Pass | DIP16 SOP16 |
| CXSD2210 | Photoelectric Type With I/O | N/A | Temporal Alarm | 10μA | Pass | DIP16 SOP16 |
| CXSD2211 | Low Voltage Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode | Yes | Continuous /Temporal selectable | 1μA | SOP16 | |
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