Photoelectric Smoke Detector
with Interconnect and Timer
A5358
DC ELECTRICAL CHARACTERISTICS (continued) at TA = –25°C to 75°C1, VSS = 0 V, in typical application (unless otherwise noted)
Characteristic
Line Regulation
Symbol
Test Conditions
Test Pin
VDD
Min.
–
Typ.2
–35
0.40
–
Max.
–
Units
dB
ΔVIRED(ΔVDD) Active, VDD = 6 to 12 V
6
IRED Temperature Coefficient
High-Level Output Current
OFF Leakage Current High
OFF Leakage Current Low
Low-Battery Alarm Threshold
αIRED
IOH
VDD = 6 to 12 V
6
7
–
9
–
–
%/°C
mA
ꢀA
VDD = Alarm, I/O active,VO = VDD – 2 V
–4.0
–
–
IOZ
VO = VDD
VO = VSS
11, 13
11, 13
5
12
12
–
–
1.0
–1.0
7.5
IOZ
–
–
ꢀA
VDD(th)
6.9
7.2
V
VDD
– 4
VDD
– 2
Common Mode Voltage
VIC
Any alarm condition
Any alarm condition
1, 2, 3
-
-
–
–
V
V
Smoke Comparator
Reference Voltage
VDD
– 3.7
VDD
– 3.3
VREF
Internal
1Limits over the operating temperature range are based on characterization data. Characteristics are production tested at 25°C only.
2Typical values are at 25°C and are given for circuit design information only.
AC ELECTRICAL CHARACTERISTICS at TA = –25°C to 75°C1. VSS = 0 V, in typical application (unless otherwise noted)
Characteristic
Oscillator Period
Symbol
tosc
Test Conditions
Test Pin
VDD
9
Min.
9.4
Typ.2
10.5
–
Max. Units
12
11
11
11.5
48
ms
s
tled1
No local or remote smoke
9
39
tled3
Local smoke
9
0.60
0.67
0.74
s
No
LED Pulse Period
LED Pulse Width
tled4
Remote smoke only
11
9
–
LED
Pulses
–
s
tled6
tled7
tw(led)
tst1
Pushbutton test, induced alarm
Timer mode, no alarm
11
11
11
4
9
9
9
9
9
0.60
9.67
9.5
0.67
10.8
–
0.74
11.8
11.5
11.9
2.96
s
s
ms
s
No local or remote smoke
After 1 of 3 valid samples
9.6
–
tst2
4
2.42
2.70
s
After 2 of 3 valid samples and during local
alarm
tst3
tst4
tst5
4
4
4
9
9
9
1.21
9.67
38.9
1.34
10.8
–
1.47
11.8
47.1
s
s
s
STROBE Pulse Period
STROBE Pulse Width
Remote smoke only
Chamber test or low battery test, no local
alarm
tst6
Pushbutton test, induced alarm
4
4
9
9
300
9.5
336
–
370
ms
ms
tw(st)
11.5
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
5
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
