A5303_16 Datasheet, PDF (5/15 Pages) Allegro MicroSystems – Photoelectric Smoke Detector with Interconnect, Timer, and Latching Alarm Indicator

A5303
Photoelectric Smoke Detector
with Interconnect, Timer, and Latching Alarm Indicator
AC ELECTRICAL CHARACTERISTICS (continued)¹ Valid at T_A = 25°C, V_DD = 2.3 to 5.5 V, configured as in Typical Application
Diagram (unless otherwise noted)
Characteristics
Symbol
Test Conditions
OSC
Count
Min.
Typ.² Max.
Unit
SOUTx Output Warning Period
SOUTx Output Warning Pulse Width
Horn Warning Pulse Period
Horn Warning Pulse Width
Horn Warning Pulse Spacing
Horn On-Time
Horn Off-Time
t_soutx
t_w(soutx)
t_horn
t_w(horn)
t_sp(horn)
t_on(horn)
t_off1(horn)
t_off2(horn)
Low supply or degraded chamber
Low supply or degraded chamber
Low battery or degraded chamber
Low battery or degraded chamber
3 chirps, degraded chamber
Local, remote, or test alarm
Local, remote, or test alarm (see Timing
Diagrams section)
Local, remote, or test alarm (see Timing
Diagrams section)
2¹²
38.9
43
47.1
s
1
9.5 10.5 11.5 ms
2¹²
38.9
43
47.1
s
1
9.5 10.5 11.5 ms
2⁶
0.60 0.67 0.74
s
48
450 500 550
ms
48
450 500 550
ms
144 1350 1500 1650 ms
Timer Mode Duration
t_timer
57344 9.0 10.0 11.0 min
Failed Push-Test Indication on SOUTx
t_FAIL
After TEST input goes low
2¹¹ to
3072
2¹¹ ×
t_osc
21.5 – 3072 ×
32.3
t_osc
s
1_{Limits over the operating temperature range are based on characterization data. Characteristics are production tested at 25°C only.}
2_{Typical values are at 25°C and are given for circuit design information only.}
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com