MPX2202DP datasheet(601/670 Pages) MOTOROLA

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Motorola Sensor Device Data

www.motorola.com/semiconductors

Low–Power CMOS

Ionization Smoke Detector IC

with Interconnect

The MC14468, 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 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

• Power–On Reset Prevents False Alarms on Battery Change

MAXIMUM RATINGS* (Voltages referenced to VSS)

Rating

Symbol

Value

Unit

DC Supply Voltage

VDD

*0.5 to + 15

Input Voltage, All Inputs Except Pin 8

Vin

*0.25 to VDD + 0.25

DC Current Drain per Input Pin, Except Pin 15 = 1 mA

DC Current Drain per Output Pin

Operating Temperature Range

*10 to + 60

°C

Storage Temperature Range

Tstg

*55 to + 125

°C

Reverse Battery Time

tRB

5.0

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

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

MC14468

P SUFFIX

PLASTIC DIP

CASE 648–08

PIN ASSIGNMENT

(16 PIN DIP)

Detect

Comp. Out

I/O

Low V Set

Strobe

Out

LED

VDD

Timing

Resistor

Feedback

Guard Hi–Z

Detect Input

Guard Lo–Z

Sensitivity Set

Osc Capacitor

Silver

Brass

VSS

ORDERING INFORMATION

MC14468P

PLASTIC DIP

REV 3

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPX2202DP Datasheet(PDF) 601 Page - Motorola, Inc

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