Datasheet > MC145011ED

MC145011ED

更新时间： 2024-09-28 04:40:59

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		光电
页数	文件大小	规格书
12页	261K
描述
Photoelectric Smoke Detector IC with I/O For Line-Powered Applications

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MC145011ED 数据手册

MC145011

Rev. 5.0, 11/2006

Freescale Semiconductor

Technical Data

Photoelectric Smoke Detector IC

with I/O For Line-Powered

Applications

MC145011

The CMOS MC145011 is an advanced smoke detector component containing

sophisticated very-low-power analog and digital circuitry. The IC is used with an in-

frared photoelectric chamber. Detection is accomplished by sensing scattered light

from minute smoke particles or other aerosols. When detection occurs, a pulsating

alarm is sounded via on-chip push-pull drivers and an external piezoelectric trans-

ducer.

PHOTOELECTRIC SMOKE

DETECTOR IC WITH I/O FOR

LINE-POWERED APPLICATIONS

The variable-gain photo amplifier allows direct interface to IR detectors (photo-

diodes). Two external capacitors C1 and C2, C1 being the larger, determine the

gain settings. Low gain is selected by the IC during most of the standby state. Me-

dium gain is selected during a local-smoke condition. High gain is used during push

button test. During standby, the special monitor circuit which periodically checks for

degraded chamber sensitivity uses high gain, also.

The I/O pin, in combination with VSS, can be used to interconnect up to 40 units

for common signaling. An on-chip current sink provides noise immunity when the I/

O is an input. A local-smoke condition activates the short-circuit-protected I/O driv-

er, thereby signaling remote smoke to the interconnected units. Additionally, the I/

O pin can be used to activate escape lights, enable auxiliary or remote alarms, and/

or initiate auto-dialers.

P SUFFIX

ED SUFFIX (PB-FREE)

PLASTIC DIP

CASE 648-08

While in standby, the low-supply detection circuitry conducts periodic checks us-

ing a load current from the LED pin. The trip point is set using two external resistors.

The supply for the MC145011 must be a dc power source capable of supplying 35

mA continuously and 45 mA peak. When the MC145011 is in standby, an external

LED is continuously illuminated to indicate that the device is receiving power.

An extinguished LED accompanied by a pulsating audible alarm indicates a lo-

cal-smoke condition. A pulsating audible alarm with the LED illuminated indicates

a remote-smoke condition. A beep or chirp indicates a low-supply condition or de-

graded chamber sensitivity. A low-supply condition does not affect the smoke de-

tection capability if V_DD≥ 6 V. Therefore, the low-supply condition and degraded

chamber sensitivity can be distinguished by performing a push button (chamber)

test. This circuit is designed to operate in smoke detector systems that comply with

UL217 and UL268 specifications.

DW SUFFIX

PLASTIC SOIC

CASE 751G-04

TEST

LOW-SUPPLY

TRIP

VSS

DETECT

STROBE

VDD

13 R1

12 OSC

Features

IRED

11 LED

•

Operating Voltage Range: 6 to 12 V

I/O

10 FEEDBACK

Operating Temperature Range: -10 to 60°C

SILVER

BRASS

Average Standby Supply Current (Visible LED Illuminated): 20 mA

Power-On Reset Places IC in Standby Mode (Non-Alarm State)

Electrostatic Discharge (ESD) and Latch Up Protection Circuitry on All Pins

Chip Complexity: 2000 FETs, 12 NPNs, 16 Resistors, and 10 Capacitors

Pb-Free Packaging Designated by Suffix Code ED

Figure 1. Pin Connections

ORDERING INFORMATION

Device

Package

MC145011P

MC145011ED

MCZ145011DW

Plastic Dip

SOIC Package

Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to

permit improvements in the design of its products.

12 3 4 5 6 7...12

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与MC145011ED相关器件

型号	品牌	获取价格	描述	数据表
MC145011P	FREESCALE	获取价格	Photoelectric Smoke Detector IC with I/O For Line-Powered Applications
MC145011P	MOTOROLA	获取价格	Other Analog Circuits
MC145012	FREESCALE	获取价格	Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver
MC145012	MOTOROLA	获取价格	Other Analog Circuits
MC145012DW	FREESCALE	获取价格	Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver
MC145012DW	MOTOROLA	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO16, SOIC-16
MC145012DWR1	MOTOROLA	获取价格	Analog Circuit, 1 Func, CMOS, PDSO16, SOIC-16
MC145012DWR2	MOTOROLA	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO16, SOIC-16
MC145012ED	FREESCALE	获取价格	Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver
MC145012P	FREESCALE	获取价格	Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver

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