Datasheet > RE46C121

RE46C121

更新时间： 2022-12-17 01:24:52

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
7页	190K
描述
CMOS Ionization Smoke Detector ASIC with Interconnect

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RE46C121 数据手册

R&E International

A Subsidiary of Microchip Technology Inc.

RE46C120

CMOS Ionization Smoke Detector ASIC

Product Specification

Features

General Description

•

Guard Outputs for Ion Detector Input

The RE46C120 is a low power CMOS ionization type

smoke detector IC. With a few external components

this circuit will provide all the required features for an

ionization type smoke detector.

+/-0.75pA Detect Input Current

Internal Reverse Battery Protection

Internal Low Battery Detection

Pin Selectable Horn Pattern

Low Quiescent Current Consumption (<6.5uA)

16L PDIP

ESD Protection on all Pins

Compatible with MC145017, MC14467

Available in RoHS Compliant Pb Free Packaging

An internal oscillator strobes power to the smoke

detection circuitry for 10.5mS every 1.66 seconds to

keep standby current to a minimum. A check for a low

battery condition is performed every 40 seconds when

in standby. The TONE input allows for selection of a

temporal pattern or a 2/3 duty cycle continuous tone.

The temporal horn pattern supports the NFPA 72

emergency evacuation signal.

Pin Configuration

Although this device was designed for smoke detection

utilizing an ionization chamber it could be used in a

variety of security applications.

DETCOMP

N/C

GUARD2

DETECT

GUARD1

VSEN

OSCAP

LBADJ

TONE

Utilizing low power CMOS technology the RE46C120

was designed for use in smoke detectors that comply

with Underwriters Laboratory Specification UL217 and

UL268.

LED

VDD

RBIAS

VSS

FEED

ABSOLUTE MAXIMUM RATINGS

PARAMETER

Supply Voltage

Input Voltage Range Except FEED

FEED Input Voltage Range

Reverse Battery Time

SYMBOL

V_DD

V_in

VALUE

-.3 to V_dd+.3

-10 to +22

UNITS

V_infd

T_RB

Input Current except FEED

Operating Temperature

Storage Temperature

I_in

T_A

T_STG

T_J

°C

-10 to 60

-55 to 125

150

Maximum Junction Temperature

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are

stress ratings only and operation at these conditions for extended periods may affect device reliability.

This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used

when handling this product. Damage can occur when exposed to extremely high static electrical charge

DS22157A-page 1

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