RE46C145 R&E International, Inc., RE46C145 Datasheet

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RE46C145

Manufacturer Part Number
RE46C145
Description
CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode
Manufacturer
R&E International, Inc.
Datasheet

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RE46C145SW16TF
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RE46C145
CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode
Product Specification
General Description
The RE46C145 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 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 can be used for a reduced
sensitivity mode.
Utilizing low power CMOS technology the RE46C145
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
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
T
V
V
V
V
T
T
I
STG
infd
DD
io1
in
in
A
J
Features
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
Internal Low Battery and Chamber Test
Compatible with Allegro A5366
Alternate Diagnostic Mode
Available in Standard Packaging or RoHS
Compliant Pb Free Packaging.
DETECT
HORNB
IRED
VDD
C2
C1
IO
Pin Configuration
-.3 to V
-10 to +22
-55 to 125
-25 to 75
-.3 to 17
VALUE
1
2
3
4
5
6
7
8
150
15
10
dd
+.3
E-mail: rande@randeint.com
16
15
14
13
12
11
10
DS-RE46C145-121806
9
TEST
VSEN
VSS
ROSC
COSC
LED
FEED
HORNS
UNITS
mA
°C
°C
°C
V
V
V
V

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RE46C145 Summary of contents

Page 1

... RE46C145 CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode Product Specification General Description The RE46C145 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. ...

Page 2

... Output Off, Output=VDD Facsimile 610.992.0734 R&E International Limits Min Typ Max Units 5 6.2 4.5 V 3.2 V 1.6 V 8.5 V 4.5 2 -100 nA -100 -50 uA 100 nA 100 . . 140 E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 3

... Active, VDD=6V to 12V 6,5 Active, VDD=6V to 12V Facsimile 610.992.0734 R&E International Limits Min Typ Max Units 5 - 6.9 7.2 7 5. 2.85 3.1 3. 3.7 3.3 .01 %/ºC .3 %/ºC -50 dB -30 dB E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 4

... LED IS NOT ON 9.6 10.75 1 7.2 8 300 336 39 94 104 450 500 Note 1 9.5 10.5 450 500 , Note 1 1.35 1.5 , Note 1. Note 2 E-mail: rande@randeint.com DS-RE46C145-121806 Max Units 11 . 11.8 S 2.2 S 1.1 S 1.1 S 8.9 S 370 115 uS 550 mS 11.5 mS 550 mS 1. 1.46 S ...

Page 5

... RE46C145 CMOS Photoelectric 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 Figure 1 Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 6

... In the timer mode this input pin can be used to set an external smoke comparator reference. 16 TEST This input is used to invoke two test modes and the timer mode. This input has an internal pull-down. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. PIN DESCRIPTIONS DESCRIPTION Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 7

... C3 is typical for an alkaline battery. This capacitance should be increased to 4.7uF or greater for a carbon battery. 3. R10, R11 and C6 are typical values and may be adjusted to maximize sound pressure. 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-RE46C145-121806 ...

Page 8

... The interconnect input has a 670mS nominal digital filter. This allows for interconnection to other types of alarms (carbon monoxide for example) that may have a pulsed interconnect signal. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. =.6931 * Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 9

... NMOS is off. If VDD falls below the threshold the NMOS turns on. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. are in place and a high to low transition occurs on the TEST input the adj2 Description Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 10

... Chamber Test and Warning is Offset from Low Battery Test and Warning by 21.5 Seconds. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Timing Diagrams Standby, No Alarm (not to scale) T PER1 T ON2 T PLED1 Low Supply or Chamber Test Failure Low Battery Warning Chirp T HOF3 Facsimile 610.992.0734 R&E International T HON3 E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 11

... Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Timing Diagrams (continued) Local Alarm Timing (not to scale) T PER2 T PLED2 Local or Remote Alarm Horn Temporal Pattern HON1 HOF1 HOF2 Interconnect Timing T IODLY2 Facsimile 610.992.0734 R&E International No Alarm E-mail: rande@randeint.com DS-RE46C145-121806 ...

Page 12

... 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-RE46C145-121806 ...

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