5347
SMOKE DETECTOR
with INTERCONNECT
and TIMER
TIMING DIAGRAMS IN TYPICAL APPLICATION
NON-TIMER MODE
NO ALARM
NO LOW BATTERY
STANDBY MODE
ALARM
NO LOW BATTERY
ALARM AND
LOW BATTERY
NO ALARM
LOW BATTERY
V12
OSC. CAP
1.67 s
10 ms
40 ms
INTERNAL
CLOCK
24 CLOCK CYCLES
24 CLOCK CYCLES
30 CLOCK CYCLES
LED
LED OFF
LED
ON
12 CLOCK CYCLES
6 CLOCK CYCLES
6 CLOCK CYCLES
SMOKE
COMPARATOR
SAMPLE
LOW BATTERY
WARNING
HORN
ON
OFF
HORN
SMOKE
CHAMBER
V15 < V13 (SMOKE)
V15 > V13 (NO SMOKE)
Dwg. WC-003
TIMER MODE
V12
OSC. CAP
1.67 s
10 ms
INTERNAL
CLOCK
368 CLOCK CYCLES
TIMER
START
TIMER
OUT
6 CLOCK CYCLES
OUTPUTS OFF (HIGH Z)
LED
LED
ON
END OF TIMER
NOTIFICATION
HORN
Dwg. WC-005
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
