MC14467-1 Datasheet, PDF (1/8 Pages) Freescale Semiconductor, Inc – Low-Power CMOS Ionization Smoke Detector IC

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
• 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
Case No.
Package
MC14467P1
648-08
Plastic Dip
Detect
Comp. OUT
1
N/C 2
Low V Set 3
Low V
Comp. OUT
4
LED 5
V_{DD 6}
Timing
Resistor
7
Feedback 8
16 Guard Hi-z
15 Detect Input
14 Guard Lo-z
13 Sensitivity Set
12 Osc Capacitor
11 Silver
10 _Brass
9 V_SS
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2005. All rights reserved.