a5349 Allegro MicroSystems, Inc., a5349 Datasheet - Page 7

• Manufacturer Part Number: a5349
• Description: Ac Ionization Smoke Detector With Interconnect And Timer
• Manufacturer: Allegro MicroSystems, Inc.

A5349
Standby Mode
Timer Mode
Low Supply Condition
TIMER START Pin
TIMER OUT Pin
Low SupplyTest
Low Supply Test
Smoke Sample
OSC CAP Pin
Internal Clock
Internal Clock
Horn Enable
Horn Enable
LED Pin
VDD Pin
LED Pin
LED Pin
Output off (High Z)
t
LED on
osc
Timing Diagrams
LED on
LED on
(Not to scale)
t
led2
t
Test event
w(osc)
t
osc
(Low supply)
AC Ionization Smoke Detector
with Interconnect and Timer
t
timer
t
horn
t
w(osc)
t
w(horn)
t
off (led)
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
LED off (high-Z)
7