a5358 Allegro MicroSystems, Inc., a5358 Datasheet - Page 6

• Manufacturer Part Number: a5358
• Description: Photoelectric Smoke Detector With Interconnect And Timer
• Manufacturer: Allegro MicroSystems, Inc.

A5358
AC ELECTRICAL CHARACTERISTICS (continued)
IRED Pulse Period
IRED Pulse Width
IRED Rise Time
IRED Fall Time
I/O to Active Delay
Rising Edge on I/O to Alarm
Horn Warning Pulse Period
Horn Warning Pulse Width
Horn On-Time
Horn Off-Time
1
2
Limits over the operating temperature range are based on characterization data. Characteristics are production tested at 25°C only.
Typical values are at 25°C and are given for circuit design information only.
Characteristic
Symbol
t
t
t
t
on(horn)
off(horn)
t
t
w(horn)
t
t
t
t
t
t
w(ired)
r(ired)
t
t
f(ired)
t
ired1
ired2
ired3
ired4
ired5
ired6
d(io)
horn
r(io)
No local or remote smoke
After 1 of 3 valid samples
After 2 of 3 valid samples and during local
alarm
Remote smoke only
Chamber test, no local alarm
Pushbutton test, induced alarm
10% to 90%
90% to 10%
Local alarm
No local alarm
Low battery or degraded chamber sensitivity
Low battery or degraded chamber sensitivity
Local or remote alarm
Local or remote alarm
Test Conditions
at T
A
= –25°C to 75°C
Photoelectric Smoke Detector
with Interconnect and Timer
1
,
V
SS
= 0 V, in typical ap pli ca tion (un less oth er wise noted)
Test Pin
8, 9
8, 9
8, 9
8, 9
6
6
6
6
6
6
6
6
6
7
7
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
9
9
9
9
9
9
9
9
9
9
9
9
9
DD
Min.
2.42
1.21
9.67
38.9
38.9
300
9.6
9.5
94
–
–
–
–
–
–
Typ.
2.70
1.34
10.8
336
252
84
–
–
–
–
–
0
–
–
–
2
Max.
128 ×
11.9
2.96
1.47
11.8
47.1
47.1
11.5
t
370
116
200
OSC
30
–
–
–
Units
ms
ms
ms
ms
μs
μs
μs
s
s
s
s
s
s
s
s
6