MC145018 Datasheet, PDF (1/8 Pages) Motorola, Inc – LONIZATION SMOKE DETECTOR IC WITH INTERCONNECT AND TEMPORAL HORN DRIVER

MOTOROLA
Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145018/D
MC145018
Low–Power CMOS
Ionization Smoke Detector IC
with Interconnect and
Temporal Horn Driver
The MC145018, 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.
• Ionization Type with On–Chip FET Input Comparator
• Piezoelectric Horn Driver
• Guard Outputs on Both Sides of Detect Input
• Input–Protection 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 Output for Detect
• Internal Reverse Battery Protection
• Strobe Output for External Trim Resistors
• I/O Pin Allows Up to 40 Units to be Connected for Common Signaling
• Supports NFPA 72, ANSi 53.41, and ISO 8201
Audible Emergency Evacuation Signals
• Power–On Reset Places IC in Standby Mode
16
1
P SUFFIX
PLASTIC DIP
CASE 648–08
ORDERING INFORMATION
MC145018P PLASTIC DIP
PIN ASSIGNMENT
(16 PIN DIP)
Detect
Comp. Out
1
I/O ²
Low V Set 3
Strobe Out ⁴
LED ⁵
V_DD 6
Timing ₇
Resistor
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
MAXIMUM RATINGS* (Voltages referenced to V_SS)
Rating
DC Supply Voltage
Input Voltage, All Inputs Except Pin 8
DC Current Drain per Input Pin, Except Pin 15 = 1 mA
Symbol
Value
Unit
V_DD
*0.5 to + 15
V
V_in
*0.25 to V_DD + 0.25
V
I
10
mA
DC Current Drain per Output Pin
Operating Temperature Range
Storage Temperature Range
I
30
mA
T_A
*10 to + 60
°C
T_stg
*55 to + 125
°C
Reverse Battery Time
t_RB
5.0
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
v v ^{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 V_in and V_out be constrained to the range V_SS (V_in or V_out) V_DD.
REV 3
© M^Mot^oo^tr^ool^ra^o, ^lI^anc.^S2^e0ⁿ00^{sor Device Data For More Information On This Product,}
1
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