Datasheet > MC145012

MC145012

更新时间： 2024-09-28 04:40:59

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		驱动器光电
页数	文件大小	规格书
14页	379K
描述
Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver

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MC145012 数据手册

Document Number: MC145012

Rev 9.0, 11/2006

Freescale Semiconductor

Technical Data

Photoelectric Smoke Detector IC with

I/O and Temporal Pattern Horn Driver

MC145012

The CMOS MC145012 is an advanced smoke detector component containing

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

infrared 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 transducer.

PHOTOELECTRIC SMOKE

DETECTOR IC WITH I/O AND

TEMPORAL PATTERN

HORN DRIVER

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

(photodiodes). 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.

Medium 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 V_SS, 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

driver, 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

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

resistors. The supply for the MC145012 can be a 9.0 V battery.

A visible LED flash accompanying a pulsating audible alarm indicates a local-

smoke condition. A pulsating audible alarm with no LED flash indicates a remote-

smoke condition. A beep or chirp occurring virtually simultaneously with an LED

flash indicates a low-supply condition. A beep or chirp occurring halfway between

LED flashes indicates degraded chamber sensitivity. A low-supply condition does

not affect the smoke detection capability if V_DD≥ 6.0 V. Therefore, the low-supply

condition and degraded chamber sensitivity can be further distinguished by

performing a push-button (chamber) test.

DW SUFFIX

EG SUFFIX (PB-FREE)

SOIC PACKAGE

CASE 751G-04

TEST

LOW-SUPPLY

TRIP

Features

•

Circuit is designed to operate in smoke detector systems that comply with

UL217 and UL268 Specifications

DETECT

STROBE

VDD

VSS

•

Operating Voltage Range: 6.0 V to 12 V, Average Supply Current: 8 µA

Operating Temperature Range: -10 to 60°C

I/O Pin Allows Units to be Interconnected for Common Signalling

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

OSC

11 LED

IRED

I/O

FEEDBACK

SILVER

BRASS

Supports NFPA 72, ANSI S3.41, and ISO 8201 Audible Emergency Evacuation

Signals

Figure 1. Pin Connections

•

Ideal for battery-powered applications

Pb-Free Packaging Designated by Suffix Codes ED and EG

ORDERING INFORMATION

Device

Temp. Range

Case No.

Package

MC145012P

16 Lead Plastic Dip

16 PDIP (Pb-Free)

16 Lead SOICW

648-08

MC145012ED

MC145012DW

MCZ145012EG/R2

-55 to +125°C

751G-04

16 SOICW (Pb-Free)

12 3 4 5 6 7...14

中文翻译

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与MC145012相关器件

型号	品牌	获取价格	描述	数据表
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
MC145012P	MOTOROLA	获取价格	Other Analog Circuits
MC145013DW	MOTOROLA	获取价格	Other Analog Circuits
MC145013DWR2	MOTOROLA	获取价格	Analog Circuit, 1 Func, CMOS, PDSO16, SOG-16
MC145013P	MOTOROLA	获取价格	Other Analog Circuits

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