Photoelectric Smoke Detector
with Interconnect and Timer
A5358
AC ELECTRICAL CHARACTERISTICS (continued) at TA = –25°C to 75°C1, VSS = 0 V, in typical application (unless otherwise noted)
Characteristic
Symbol
Test Conditions
Test Pin
VDD
Min.
Typ.2
Max.
11.9
2.96
Units
tired1
No local or remote smoke
6
6
9
9.6
–
s
s
tired2
After 1 of 3 valid samples
9
2.42
2.70
After 2 of 3 valid samples and during local
alarm
tired3
6
9
1.21
1.34
1.47
s
IRED Pulse Period
tired4
tired5
Remote smoke only
6
6
6
6
6
6
7
9
9
9
9
9.67
38.9
300
94
–
10.8
–
11.8
47.1
370
116
30
s
s
Chamber test, no local alarm
Pushbutton test, induced alarm
tired6
336
–
ms
ꢀs
ꢀs
ꢀs
s
IRED Pulse Width
IRED Rise Time
IRED Fall Time
tw(ired)
tr(ired)
tf(ired)
td(io)
10% to 90%
90% to 10%
Local alarm
–
–
–
200
–
I/O to Active Delay
9
9
–
0
13 ×
tOSC
Rising Edge on I/O to Alarm
tr(io)
No local alarm
7
–
–
s
Horn Warning Pulse Period
Horn Warning Pulse Width
Horn On-Time
thorn
Low battery or degraded chamber sensitivity
Low battery or degraded chamber sensitivity
Local or remote alarm
8, 9
8, 9
8, 9
8, 9
9
9
9
9
38.9
9.5
–
–
–
47.1
11.5
–
s
tw(horn)
ton(horn)
toff(horn)
ms
ms
ms
252
84
Horn Off-Time
Local or remote alarm
–
–
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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
