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PDF RE46C146 Data sheet ( Hoja de datos )

Número de pieza RE46C146
Descripción CMOS Photoelectric Smoke Detector ASIC
Fabricantes R & E International 
Logotipo R & E International Logotipo



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R&E International
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.
Features
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
Pin Configuration
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.
C1
C2
DETECT
STROBE
VDD
IRED
IO
HORNB
1
2
3
4
5
6
7
8
16 TEST
15 VSEN
14 VSS
13 ROSC
12 COSC
11 LED
10 FEED
9 HORNS
Utilizing low power CMOS technology the RE46C146
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
SYMBOL
VDD
Vin
Vinfd
Vio1
Iin
TA
TSTG
TJ
VALUE
12.5
-.3 to Vdd +.3
-10 to +22
-.3 to 17
10
-25 to 75
-55 to 125
150
UNITS
V
V
V
V
mA
°C
°C
°C
Telephone 610.992.0727
Facsimile 610.992.0734
Page 1 of 12
DS-RE46C146-060605
This datasheet contains PROPRIETARY and CONFIDENTIAL information.

1 page




RE46C146 pdf
RE46C146
CMOS Photoelectric Smoke Detector ASIC with Intelligent IO and Timer Mode
Preliminary Product Specification
Functional Block Diagram
R&E International
Figure 1
Telephone 610.992.0727
Facsimile 610.992.0734
Page 5 of 12
DS-RE46C146-060605
This datasheet contains PROPRIETARY and CONFIDENTIAL information.

5 Page





RE46C146 arduino
RE46C146
CMOS Photoelectric Smoke Detector ASIC with Intelligent IO and Timer Mode
Preliminary Product Specification
STROBE
IRED
LED
Timing Diagrams (continued)
Local Alarm Timing (not to scale)
TPER2
TPLED2
Horn
IO
No Alarm
Smoke Alarm Horn Temporal Pattern (not to scale)
Local Alarm
THON1
THOF1
THOF2
TIODLY1
CO Alarm Horn Temporal Pattern (not to scale)
THON3
Remote CO Alarm
THOF4
THOF5
Horn
TIOPW 1
IO
Notes:
TIOTO1
1. Smoke is not sampled when the horn is active. Horn cycle is self completing in local alarm.
2. Low battery warning chirp is suppressed in local or remote alarm
3. IO Dump active only in local alarm, inactive if external alarm
R&E International
No Alarm
Telephone 610.992.0727
Facsimile 610.992.0734
Page 11 of 12
DS-RE46C146-060605
This datasheet contains PROPRIETARY and CONFIDENTIAL information.

11 Page







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