RE46C140 R&E International, Inc, RE46C140 Datasheet

RE46C140

Manufacturer Part Number

RE46C140

Description

CMOS Photoelectric Smoke Detector ASIC with Intelligent Interconnect and Timer Mode

Manufacturer

R&E International, Inc

Datasheet

1.RE46C140.pdf (12 pages)

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RE46C146

CMOS Photoelectric Smoke Detector ASIC with Intelligent Interconnect and Timer Mode

Preliminary Product Specification

General Description

The RE46C146 is low power CMOS photoelectric type

smoke detector IC. With minimal external components

this circuit will provide all the required features for a

photoelectric type smoke detector.

The design incorporates a gain selectable photo

amplifier for use with an infrared emitter/detector pair.

An internal oscillator strobes power to the smoke

detection circuitry for 100us every 10 seconds to keep

standby current to a minimum. If smoke is sensed the

detection rate is increased to verify an alarm condition.

A high gain mode is available for push button chamber

testing.

In the diagnostic mode the photo amplifier output is

available on pin 15 for production calibration of the

photo chamber.

A check for a low battery condition and chamber

integrity is performed every 43 seconds when in

standby. The temporal horn pattern for a smoke alarm

condition supports the NFPA 72 emergency evacuation

signal.

An interconnect pin allows multiple detectors to be

connected such that when one units alarms, all units

will sound. The interconnect is compatible with certain

types of CO interconnect signaling and when

recognized will sound the temporal pattern for a carbon

monoxide alarm.

An internal 10 minute timer can be used for a reduced

sensitivity mode.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

Supply Voltage

Input Voltage Range Except FEED, IO

FEED Input Voltage Range

IO Input Voltage Range

Input Current except FEED

Operating Temperature

Storage Temperature

Maximum Junction Temperature

Telephone 610.992.0727

Page 1 of 12

R&E International

This datasheet contains PROPRIETARY and CONFIDENTIAL information.

Facsimile 610.992.0734

SYMBOL

STG

infd

io1

Features

•

Utilizing low power CMOS technology the RE46C146

was designed for use in smoke detectors that comply

with Underwriters Laboratory Specification UL217 and

UL268.

STROBE

Internal Power On Reset

Low Quiescent Current Consumption

Available in 16L PDIP or 16L N SOIC

ESD Protection on all Pins

Interconnect up to 40 Detectors

10 Minute Timer for Sensitivity Control

Temporal Horn Pattern for Smoke and CO

Internal Low Battery and Chamber Test

Compatible with Allegro A5366

Alternate Diagnostic Mode

DETECT

HORNB

IRED

VDD

Pin Configuration

-.3 to V

-10 to +22

-55 to 125

-25 to 75

-.3 to 17

VALUE

12.5

150

+.3

E-mail: rande@randeint.com

DS-RE46C146-060605

TEST

VSEN

VSS

ROSC

COSC

LED

FEED

HORNS

UNITS

°C

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