Freescale Semiconductor
Technical Data
MC14467-1
Rev 4, 05/2005
Low-Power CMOS
Ionization Smoke Detector IC
The MC14467-1, 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.
Features
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Ionization Type with On-Chip FET Input Comparator
Piezoelectric Horn Driver
Guard Outputs on Both Sides of Detect Input
Input-Production Diodes on the Detect Input
Low-Battery Trip Point, Internally Set, can be Altered Via External Resistor
Detect Threshold, Internally Set, can be Altered Via External Resistor
Pulse Testing for Low Battery Uses LED for Battery Loading
Comparator Outputs for Detect and Low Battery
Internal Reverse Battery Protection
MC14467-1
LOW-POWER CMOS
IONIZATION
SMOKE DETECTOR IC
P SUFFIX
16-LEAD PLASTIC DIP
CASE 648-08
ORDERING INFORMATION
Device
MC14467P1
Case No.
648-08
Package
Plastic Dip
Detect
Comp. OUT
N/C
Low V Set
Low V
Comp. OUT
LED
V
DD
Timing
Resistor
Feedback
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Guard Hi-z
Detect Input
Guard Lo-z
Sensitivity Set
Osc Capacitor
Silver
Brass
V
SS
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2005. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
