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MC145017P

Low-Power CMOS Ionlzatlon Smoke Detector IC with Temporal Pattern Horn Driver

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document

by MC145017/D

MC145017

Low–Power CMOS

Ionization Smoke Detector IC

with Temporal Pattern Horn Driver

The MC145017, 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–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

• Supports NFPA 72, ANSi 53.41, and ISO 8201

Audible Emergency Evacuation Signals

16

1

P SUFFIX

PLASTIC DIP

CASE 648–08

ORDERING INFORMATION

MC145017P PLASTIC DIP

PIN ASSIGNMENT

(16 PIN DIP)

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

MAXIMUM RATINGS* (Voltages referenced to VSS)

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

VDD

*0.5 to + 15

V

Vin

*0.25 to VDD + 0.25

V

I

10

mA

DC Current Drain per Output Pin

Operating Temperature Range

Storage Temperature Range

I

30

mA

TA

*10 to + 60

°C

Tstg

*55 to + 125

°C

Reverse Battery Time

tRB

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 Vin and Vout be constrained to the range VSS (Vin or Vout) VDD.

REV 3

© MMotootroolrao, lIanc.S2e0n00sor Device Data

1

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