MC14467-1_07 Datasheet, PDF (1/9 Pages) Freescale Semiconductor, Inc – Low-Power CMOS Ionization Smoke Detector IC

Freescale Semiconductor
Technical Data
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
• Pb-Free Packaging Designated by Suffix Code ED and EG
ORDERING INFORMATION
Device
Case No.
Package
MC14467P1
MC14467ED1
648-08
Plastic Dip
MCZ14467EG/R2
751G-04
SOICW
MC14467-1
Rev 5.0, 3/2007
MC14467-1
LOW-POWER CMOS
IONIZATION
SMOKE DETECTOR IC
P SUFFIX
ED SUFFIX
(PB-FREE)
16-LEAD
PLASTIC DIP
CASE 648-08
EG SUFFIX
(PB-FREE)
16-LEAD
SOICW
CASE 751G-04
DETECT
COMP. OUT
1
N/C ₂
LOW V SET ₃
LOW V
COMP. OUT
4
LED 5
VDD 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 ^VSS
DETECT
COMP. OUT
1
N/C
2
LOW V SET
3
LOW V
COMP. OUT
4
LED 5
VDD
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
VSS
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2007. All rights reserved.