a5354 Allegro MicroSystems, Inc., a5354 Datasheet

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a5354

Manufacturer Part Number
a5354
Description
Smoke Detector With Interconnect
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
NO CONNECT.
NO CONNECT.
Supply Voltage Range,
Reverse Battery (10.5 V) ....................... 20 s
Input Voltage Range,
Input Current, I
Operating Temperature Range,
Storage Temperature Range,
CAUTION: CMOS devices have input static
protection but are susceptible to damage when
exposed to extremely high static electrical
charges.
TIMING RES.
LOW-V SET
FEEDBACK
+ SUPPLY
V
V
T
T
DD
IN
A
S
LED
I / O
..................................... 0 C to +50 C
............................... -55 C to +125 C
........................ -0.3 V to V
................................ -0.5 V to +15 V
1
2
3
4
5
6
7
8
NC
NC
V
DD
IN
............................... 10 mA
DRIVER
LOGIC
OSC. &
TIMING
HORN
V
SS
16
15
14
13
12
11
10
9
DD
GUARD
GUARD
DETECT. IN
SENSITIVITY
SET
OSC. CAP.
HORN
HORN
– SUPPLY
+ 0.3 V
1
2
1
2
5354
required features for an ionization-type smoke detector. A networking
capability allows as many as 125 units to be interconnected so that if
any unit senses smoke, all units will sound an alarm. In addition,
special features are incorporated to facilitate alignment and test of the
finished smoke detector. This device is designed to comply with
Underwriters Laboratories Specification UL217.
a minimum by powering down the device for 1.66 seconds and sensing
smoke for only 10 ms. Every 24 on/off cycles, a check is made for low
battery condition. By substituting other types of sensors, or a switch
for the ionization detector, this very-low power device can be used in
numerous other battery-operated safety/security applications.
package. It is rated for continuous operation over the temperature
range of 0 C to +50 C. Similar devices, with an internal timer to allow
for a period of reduced sensitivity (“hush”), are available as the
A5348CA.
Always order by complete part number: A5354CA .
Interconnect Up to 125 Detectors
Piezoelectric Horn Driver
Guard Outputs for Detector Input
Pulse Testing for Low Battery
Power-ON Reset
Internal Reverse Battery Protection
Built-In Hysteresis Reduces False Triggering
The A5354CA is a low-current, CMOS circuit providing all of the
The internal oscillator and timing circuitry keeps standby power to
The A5354CA is supplied in a low-cost, 16-pin dual in-line plastic
WITH INTERCONNECT
SMOKE DETECTOR

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a5354 Summary of contents

Page 1

... WITH INTERCONNECT The A5354CA is a low-current, CMOS circuit providing all of the required features for an ionization-type smoke detector. A networking capability allows as many as 125 units to be interconnected so that if any unit senses smoke, all units will sound an alarm. In addition, ...

Page 2

... V DD LOGIC POWER-ON RESET OSCILLATOR & TIMING CONNECTION GUARD 2 +V 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1996, Allegro MicroSystems, Inc. FEEDBACK 8 11 HORN 2 10 HORN LED TIMING RES OSC. CAP CONNECTION Dwg ...

Page 3

Characteristic Supply Voltage Range Detector Input Current Input Offset Voltage Hysteresis Common Mode Range Active Guard Impedance Oscillator Period Oscillator Pulse Width Low Voltage Threshold Sensitivity Adjust Voltage Horn Output Voltage Horn Output ON Time Horn Output OFF Time LED ...

Page 4

... I/O Delay Supply Current NOTE 1: Negative current is defined as coming out of (sourcing) the specified device pin. NOTE 2: Alarm (Smoke) Condition is defined as V The A5354CA is a low-current CMOS circuit providing all of the required features for an ionization-type smoke detector. Oscillator. An internal oscillator operates with a period of 1.67 seconds during no- smoke conditions ...

Page 5

I/O. A connection is provided at pin 2 to allow multiple smoke detectors to be commoned. If any single unit detects smoke (I/O is driven high), all connected units will sound their associated horns after a nominal 3 second delay. ...

Page 6

SMOKE DETECTOR with INTERCONNECT INTERNAL CLOCK HORN V2 IN I/O INTERNAL CLOCK HORN V2 OUT I/O REMOTE ALARM MODE CYCLES 2 CYCLES HORN OFF ON HORN NOT SELF COMPLETING WHEN IN REMOTE ONLY ALARM LOCAL ALARM ...

Page 7

MAX 0.015 MIN 0.022 0.014 16 7.11 6.10 1 1.77 1.15 5.33 MAX 0.39 MIN NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative. 3. ...

Page 8

... Ionization-Type Smoke Detector with Interconnect and Timer A5348CA Ionization-Type Smoke Detector with Interconnect, Timer, and Reverse-Battery Protection A5349CA Ionization-Type Smoke Detector with Interconnect and Timer for AC Line Operation A5354CA Ionization-Type Smoke Detector with Interconnect and Reverse-Battery Protection A5355CA Ionization-Type Smoke Detector with Interconnect and Reverse-Battery Protection A5358CA Photoelectric-Type Smoke Detector with Interconnect and Timer SAFETY & ...

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