RE46C122 R&E International, Inc., RE46C122 Datasheet

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RE46C122

Manufacturer Part Number
RE46C122
Description
CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode
Manufacturer
R&E International, Inc.
Datasheet

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RE46C122E16F
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RE46C122
CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode
Product Specification
General Description
The RE46C122 is low power CMOS ionization type
smoke detector IC. With few external components this
circuit will provide all the required features for an
ionization type smoke detector.
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 temporal horn pattern 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.
An internal 10 minute timer allows for a separate button
to be used for reduced sensitivity mode.
Although this device was designed for smoke detection
utilizing an ionization chamber it could be used in a
variety of security applications.
Utilizing low power CMOS technology the RE46C122
was designed for use in smoke detectors that comply
with Underwriters Laboratory Specification UL217 and
UL268.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Input Voltage Range Except FEED, IO
FEED Input Voltage Range
IO Input Voltage Range
Reverse Battery Time
Input Current except FEED
Operating Temperature
Storage Temperature
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.
Telephone 610.992.0727
Page 1 of 10
R&E International
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
SYMBOL
T
V
V
V
T
V
T
T
I
STG
infd
DD
RB
io1
in
in
A
J
Features
TSTROBE
TSTART
>1500V ESD Protection (HBM) on all Pins
Guard Outputs for Ion Detector Input
+/-0.75pA Detect Input Current
Internal Reverse Battery Protection
Low Quiescent Current Consumption (<6.5uA)
Available in 16L PDIP or 16L N SOIC
Internal Low Battery Detection
Power Up Low Battery Test
Interconnect up to 40 Detectors
10 Minute Timer for Sensitivity Control
Compatible with Allegro A5367
Available in Standard Packaging or RoHS Compliant
Pb Free Packaging.
LBADJ
RBIAS
FEED
VDD
LED
IO
Pin Configuration
-.3 to V
-10 to +22
-55 to 125
-10 to 60
VALUE
-.3 to 17
1
2
3
4
5
6
7
8
150
15
10
5
dd
+.3
E-mail: rande@randeint.com
DS-RE46C122-121806
16
15
14
13
12
11
10
9
GUARD2
DETECT
GUARD1
VSEN
OSCAP
HS
HB
VSS
UNITS
mA
°C
°C
°C
V
V
V
S
V

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RE46C122 Summary of contents

Page 1

... RE46C122 CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode Product Specification General Description The RE46C122 is low power CMOS ionization type smoke detector IC. With few external components this circuit will provide all the required features for an ionization type smoke detector. ...

Page 2

... A 13 SET1 3 SET2 Facsimile 610.992.0734 R&E International Limits Min Typ Max Units 6 6.2 4 4.5 V 4.5 2 2.5 V -0.75 pA -1.50 pA -50 uA 0. 150 6 - 7.2 7.5 7.8 V 48 E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 3

... kΩ 90 130 170 mV Limits Min Typ Max Units 1.34 1. 37.5 41.5 45.8 mS 9.4 10.5 12.9 mS 9.4 10 450 500 550 mS 9.4 10.5 12.9 mS 450 500 550 mS 1.35 1.5 1. 1.34 1.67 2 450 mS .450 2 Min E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 4

... RE46C122 CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode Product Specification Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Functional Block Diagram Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 5

... During this 10 minute period the open drain NMOS on pin 4 (TSTROBE) is strobed on with the internal clock. A resistor connected to this pin could be used to modify the detector sensitivity for the timer period. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 6

... C2 should be located as close as possible to the device power pins. Route the pin 8 PC board trace away from pin 7 to avoid coupling. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Typical Application Figure 2 Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 7

... C2 should be located as close as possible to the device power pins. Route the pin 8 PC board trace away from pin 7 to avoid coupling. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Typical Single Button Application Figure 3 Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 8

... IODLY2 Horn pattern not self completing for external alarm,see timing below for complete horn cycle T HOF2 Facsimile 610.992.0734 R&E International Alarm; Low Battery No Alarm; Low Battery Pin 15 > Pin 13 Low Battery Warning Chirp LED supressed in remote alarm mode E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 9

... CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode Product Specification Oscillator 10.5mS Internal Clock TSTART T LOF3 LED Outputs High Z TSTROBE Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Timing Diagram (Timer Mode) 1.67S T TPER Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

Page 10

... A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C122-121806 ...

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