MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14467-1
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.
16
1
P SUFFIX
PLASTIC DIP
CASE 648–08
• 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
ORDERING INFORMATION
MC14467P1 PLASTIC DIP
• 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
PIN ASSIGNMENT
(16 PIN DIP)
• Comparator Outputs for Detect and Low Battery
• Internal Reverse Battery Protection
Detect
Comp. Out
1
16
Guard Hi–Z
N/C
2
15
Detect Input
Low V Set
3
14
Guard Lo–Z
Low V
Comp. Out
4
13
Sensitivity Set
LED
5
12
Osc Capacitor
VDD
6
11
Silver
Timing
Resistor
7
10
Brass
Feedback
8
9
VSS
MAXIMUM RATINGS* (Voltages referenced to VSS)
Rating
Symbol
DC Supply Voltage
Value
*0.5 to + 15
VDD
Unit
V
Vin
*0.25 to VDD + 0.25
DC Current Drain per Input Pin, Except Pin 15 = 1 mA
I
10
mA
DC Current Drain per Output Pin
I
30
mA
Input Voltage, All Inputs Except Pin 8
Storage Temperature Range
Tstg
*10 to +60
*55 to + 125
Reverse Battery Time
tRB
5.0
Operating Temperature Range
TA
V
°C
°C
s
* 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.
v
v
REV 3
Motorola Sensor Device Data
www.motorola.com/semiconductors
4–3