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PC14568ED/R2 Datasheet

  • PC14568ED/R2

  • Low-Power CMOS Ionization Smoke Detector with Interconnect a...

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Freescale Semiconductor
Product Preview
Document Number: MC14568
Rev. 1.0, 11/2006
Low-Power CMOS Ionization Smoke
Detector with Interconnect and Timer
The MC14568, when used with an ionization chamber and a small number of
external components, will detect smoke. When smoke is sensed, an alarm is
sounded via an external piezoelectric transducer and internal drivers. This circuit
is designed to operate in smoke detector systems that comply with UL217 and
UL268 specifications.
An internal oscillator with associated logic controls the overall functionality by
powering down the device for 1.67 seconds and sensing smoke in a 10 ms
window. In this way, standby current consumption is reduced to between 5.0 and
9.0
碌A(chǔ),
thus providing longer battery life. In addition, a networking capability
allows as many as 125 to be interconnected so that if any unit senses smoke, all
units will sound an alarm.
The MC14568 is supplied in a 16-pin dual in-line plastic package and is
designed to run on a power supply between 6 to 12 Volts.
Features
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Speed-Up Sampling Rate of 40 ms of Internal Clock Period (Pin 12) After First
Detection of Smoke
Timer Function for Reduced Sensitivity for a Nominal Period of 6.43 Minutes
(10 Minutes Max)
High-Smoke Detection in the 鈥淩educed Sensitivity鈥?Mode
Internal and External Low Battery Threshold
Internal and External Smoke Reference Settings
Guaranteed Power Up Without Random LED and Horn Chirps
Reversed Battery Protection
Low Leakage Detect Pin
Metal Option to Add Double Chirp at End of Reduced Sensitivity Period;
Default is No Chirp
Pb-Free Packaging Designated by Suffix Code ED
MC14568
LOW-POWER CMOS IONIZATION
SMOKE DETECTOR WITH
INTERCONNECT AND TIMER
P SUFFIX
ED SUFFIX (PB-FREE)
PLASTIC DIP
CASE 648-08
TIMER START
I/O
LOW-V SET
TIMER OUT
LED
VDD
TIMING R
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GUARD 2
DETECT INPUT
GUARD 1
SENSITIVITY SET
OSCILLATOR CAP
HORN 2
HORN 1
VSS
ORDERING INFORMATION
Device
PC14568P/R2
648-08
PC14568ED/R2
Plastic Dip
Case No.
Package
FEEDBACK
Figure 1. Pin Connections
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
漏 Freescale Semiconductor, Inc., 2006. All rights reserved.

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