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Freescale Semiconductor Electronic Components Datasheet



MC14467-1

Low-Power CMOS Ionization Smoke Detector IC



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MC14467-1 pdf
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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
N/C
LOW V SET
LOW V
COMP. OUT
LED
VDD
TIMING
RESISTOR
FEEDBACK
1
2
3
4
5
6
7
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
N/C
LOW V SET
LOW V
COMP. OUT
LED
VDD
TIMING
RESISTOR
FEEDBACK
1
2
3
4
5
6
7
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.



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MC14467-1 pdf
VDD
VDD
80 K
3
4 Low Battery Comp.
Latch
+
Priezoelectric
Horn Driver
8
11
10
1045 K
13
1125 K
VDD
7
Oscillator
Timer
12
+
15
1
Latch
Detect Input
14 Lo-Z
+
Active
Guard
VDD
VDD
56
9
Led Driver
Figure 2. Block Diagram
Table 1. Maximum Ratings(1)
(Voltages referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
Input Voltage, All Inputs Except Pin 8
DC Current Drain per Input Pin, Except Pin 15 = 1 mA
VDD 0.5 to + 15
V
VIN 0.25 to VDD + 0.25
V
I 10 mA
DC Current Drain per Output Pin
I 30 mA
Operating Temperature Range
Storage Temperature Range
Reverse Battery Time
TA
TSTG
tRB
10 to +60
55 to + 125
5.0
°C
°C
s
1. Maximum Ratings are those values beyond which damage to the device may occur. This device contains circuitry to protect the inputs
against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of
any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation it is recommended that except for pin 8,
VIN and VOUT be constrained to the range VSS (VIN or VOUT) VDD. For pin 8, refer to the Electrical Characteristics.
MC14467-1
2
Sensors
Freescale Semiconductor



Part Number MC14467-1
Description Low-Power CMOS Ionization Smoke Detector IC
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 9 Pages
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