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PDF ( 数据手册 , 数据表 ) 5366

零件编号 5366
描述 PHOTOELECTRIC SMOKE DETECTOR
制造商 Allegro
LOGO Allegro LOGO 


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5366 数据手册, 描述, 功能
5366
PHOTOELECTRIC SMOKE DETECTOR
WITH INTERCONNECT AND TIMER
C1 1
C2 2
DETECT 3
STROBE 4
+ SUPPLY 5 VDD
IRED 6
I/O 7
HORN1 8
16 TEST
15 HUSH
VSS 14 – SUPPLY
OSC. &
TIMING
13 TIMING RES.
12 OSC. CAP.
LOGIC
11 LED
HORN
DRIVER
10 FEEDBACK
9 HORN2
Dwg. PC-007
The selectable Hush Feature may be covered
by U.S. patent number Re. 33,920. Any sale
or use of the Hush Feature in a smoke alarm
in the U.S. would be a possible infringement
of this patent.
The A5366CA is a low-current BiCMOS circuit providing all of the
required features for a photoelectric type smoke detector. This device
can be used in conjunction with an infrared photoelectric chamber to
sense scattered light from smoke particles. Special features are
incorporated in the design to facilitate calibration and testing of the
finished detector. The device is designed to comply with Underwriters
Laboratories Specification UL217.
A variable-gain photo amplifier can be directly interfaced to an
infrared emitter/detector pair. The amplifier gain levels are determined
by two external capacitors that are then internally selected depending
on the operating mode. Low gain is selected during standby and timer
modes. During a local alarm this low gain is increased (internally) by
~10% to reduce false triggering. High gain is used during the push-
button test and during standby to periodically monitor the chamber
sensitivity.
The internal oscillator and timing circuitry keeps standby power to
a minimum by sensing for smoke every 10 seconds in a 100 µs
window. A special three-stage speedup sensing scheme is incorpo-
rated to minimize the time to an audible alarm and also to reduce false
triggering. Also, two consecutive cycles of degraded chamber sensitiv-
ity are required for a warning signal to occur.
The A5366CA is supplied in a low-cost 16-pin dual in-line plastic
package. It is rated for continuous operation over the temperature
range of -25°C to +75°C.
ABSOLUTE MAXIMUM RATINGS
(Voltages are referenced to VSS)
Supply Voltage Range,
VDD .................................... -0.5 V to +15 V
Input Voltage Range,
VIN ............................ -0.3 V to VDD + 0.3 V
Input Current, IIN ................................... 10 mA
Operating Temperature Range,
TA ..................................... -25°C to +75°C
Storage Temperature Range,
TS ................................... -55°C to +125°C
CAUTION: CMOS devices have input static
protection but are susceptible to damage if exposed
to extremely high static electrical charges.
FEATURES
s Interconnect Up to 50 Detectors
s Piezoelectric Horn Driver
s All Internal Low-Battery Detection
s Power-ON Reset
s Internal Timer & Control for Reduced Sensitivity
s Built-In Circuits to Reduce False Triggering
s 6 V to 12 V Operating Voltage Range
s ESD-Protection Circuitry on All Pins
s Temporal Horn Pattern
Always order by complete part number: A5366CA .







5366 pdf, 数据表
5366
PHOTOELECTRIC SMOKE DETECTOR
with INTERCONNECT and TIMER
PIN AND CIRCUIT DESCRIPTION, continued
The Diagnostic Test Mode is initiated by pulling this
pin below VSS and continuously sourcing 100 µA from the
pin for at least one clock cycle on the OSC. CAP. pin.
This mode is used to facilitate calibration and test of the
IC and the assembled detector. In this mode, certain
device pins are reconfigured as described below. In this
mode, the IRED pulse rate is increased to one every OSC.
CAP. cycle and the STROBE pin is always active. To exit
this mode, the test pin is floated for at least one OSC.
CAP. cycle.
Pin Name
HORN1
LED
Pin No. Configuration
8 This pin is reconfigured as the
smoke integrator output. Three
consecutive smoke detections
will cause this pin to go high
and three consecutive no-
smoke detections cause this
pin to go low.
11 This pin becomes a low-battery
indicator. The open-drain
NMOS output is normally OFF.
If VDD falls below the low-
battery threshold, the output
turns ON.
TYPICAL APPLICATION
VDD
CONNECT FOR TIMER MODE OR "HUSH" OPERATION
C1
C2 560
1
2
PUSH
TO
TEST
16
15
CONNECT FOR
NON-TIMER MODE
OPERATION
+ 9V
SMOKE
CHAMBER
200k
1k
+
100µF
3
4
5 VDD
6
7
8
VSS 14
OSC. &
TIMING
13
100k
12
LOGIC
HORN
DRIVER
11
1000pF
10
9
220k
TO/FROM
OTHER
UNITS
220
Dwg. EC-006
115 Northeast Cutoff, Box 15036
8 Worcester, Massachusetts 01615-0036 (508) 853-5000














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