Allegro A5364CA Datasheet
NO CONNECT.
I / O
LOW-V SET
NO CONNECT.
LED
+ SUPPLY
TIMING RES.
FEEDBACK
5364
required features for an ionization-type smoke detector. A networking
capability allows as many as 125 units to be interconnected so that if
NC
1
2
3
4
5
6
7
89
NC
V
LOGIC
OSC. &
TIMING
DD
HORN
DRIVER
V
GUARD
16
15
14
13
12
11
10
SS
2
DETECT. IN
GUARD
1
SENSITIVITY
SET
OSC. CAP.
HORN
2
HORN
1
– SUPPLY
Dwg. PC-004-1
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
A5368CA.
SMOKE DETECTOR
WITH INTERCONNECT
The A5364CA is a low-current, CMOS circuit providing all of the
The internal oscillator and timing circuitry keeps standby power to
The A5364CA is supplied in a low-cost, 16-pin dual in-line plastic
Data Sheet
26110.7A
ABSOLUTE MAXIMUM RATINGS
(Voltages are referenced to VSS)
Supply Voltage Range,
VDD.......................... -0.5 V to +15 V
Reverse Battery (10.5 V) ................ 20 s
Input Voltage Range,
VIN.................. -0.3 V to V
Input Current, IIN........................ 10 mA
Operating Temperature Range,
TA............................... 0°C to +50°C
Storage Temperature Range,
TS......................... -55°C to +125°C
CAUTION: CMOS devices have input static
protection but are susceptible to damage
when exposed to extremely high static
electrical charges.
DD
+ 0.3 V
FEATURES
■ 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
■ Temporal Horn Pattern
Always order by complete part number: A5364CA .
5364
SMOKE DETECTOR
WITH INTERCONNECT
FUNCTIONAL BLOCK DIAGRAM AND TYPICAL APPLICATION
+ SUPPLY
9 V
+
3
LOW-V
SET
13
SENSITIVITY
SET
– SUPPLY
9
V
SS
V
DD
6
–
+
+
–
+
–
14
GUARD GUARD
DETECT.
12
15
IN
+V
I / O
2
LOGIC
16
V
DD
POWER-ON
OSCILLATOR
& TIMING
CONNECTION
RESET
1
NO
FEEDBACK
8
11
HORN
2
10
HORN
1
5
LED
TIMING RES.
7
OSC. CAP.
12
4
NO
CONNECTION
+V
+V
Dwg. FC-001-4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1998, 1999 Allegro MicroSystems, Inc.
5364
SMOKE DETECTOR
WITH INTERCONNECT
ELECTRICAL CHARACTERISTICS at T
R
= 8.2 MΩ (unless otherwise noted).
7
Test
Characteristic Pin Test Conditions Min. Typ. Max. Units
Supply Voltage Range 6 Operating 6.0 9.0 12 V
Detector Input Current 15 0 to 40% RH, VIN = 0 to 9.0 V — — ±1.0 pA
Input Offset Voltage 14-15 Active Guard — — ±100 mV
16-15 Active Guard — — ±100 mV
15-13 Detect Comparator — — ±50 mV
Hysteresis 13 No Alarm to Alarm 90 130 170 mV
Common Mode Range 14-15 Guard Amplifier 2.0 — VDD - 0.5 V
13-15 Smoke Comparator 0.5 — VDD - 2.0 V
Active Guard Impedance 14 to V
16 to V
Oscillator Period 12 No Alarm 1.34 1.67 2.00 s
Oscillator Pulse Width 4 8.0 10 12 ms
Low Voltage Threshold 6 TA = 0 to 50°C 7.2 — 7.8 V
= +25°C, VDD = 9.0 V, VSS = 0 V, C
A
SS
SS
Alarm 32 40 48 ms
= 0.1 µF,
12
Limits
—10—kΩ
— 500 — kΩ
Sensitivity Adj. Voltage 13 V13/VDD, pin 13 open circuit 48.5 50 51.5 %
Horn Output Voltage 10-11 I
Horn Output ON Time 10-11 Alarm (see figure, time “A”) 450 500 550 ms
Horn Output OFF Time 10-11 Alarm (see figure, time “B”) 450 500 550 ms
LED Output ON Current 5 VDD = 7.2 V, V
LED Output ON Time 5 No Local Alarm; Not Latched 8.0 10 12 ms
LED Output OFF Time 5 No Alarm, In Standby 32 40 48 s
NOTE 1: Negative current is defined as coming out of (sourcing) the specified device pin.
= 16 mA, VDD = 9.0 V — 0.1 0.5 V
OUT
I
= 16 mA, VDD = 7.2 V — — 0.9 V
OUT
I
= -16 mA, VDD = 9.0 V 8.5 8.8 — V
OUT
I
= -16 mA, VDD = 7.2 V 6.3 — — V
OUT
Low Battery 8.0 10 12 ms
Alarm (see figure, time “C”) 1350 1500 1650 ms
Low Battery 32 40 48 s
= 1.0 V 10 — — mA
OUT
Continued next page . . .
NOTE 2: Alarm (Smoke) Condition is defined as V15 < V13; No Alarm (No Smoke) Condition as V15 > V13.
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