a5349 Allegro MicroSystems, Inc., a5349 Datasheet - Page 2

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

THERMAL CHARACTERISTICS
A5349
Selection Guide
Absolute Maximum Ratings*
Package Thermal Resistance
*Additional thermal information available on Allegro website.
TIMER START
Supply Voltage Range
Input Voltage Range
Input Current
Operating Ambient Temperature
Junction Temperature
Storage Temperature Range
* CAUTION: CMOS devices have input static protection but are susceptible to damage when exposed to extremely high static electrical charges.
TIMING RES
TIMER OUT
LOW-V SET
FEEDBACK
A5349CA-T
A5349CA
Part Number
VDD
LED
I/O
Characteristic
Characteristic
1
2
3
4
5
6
7
8
Pin-out Diagram
16
15
14
13
12
11
10
9
GUARD2
DETECT IN
GUARD1
SENSITIVITY SET
OSC CAP
HORN2
HORN1
VSS
Pb-Free
Yes
–
Symbol
R
T
Symbol
θJA
J
V
(max)
T
V
I
T
DD
IN
stg
IN
A
Terminal List Table
4-layer PCB based on JEDEC standard
Number
Referenced to V
Referenced to V
Range C
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
25 pieces per tube
SENSITIVITY SET
Packing
TIMER START
TIMING RES
LOW-V SET
TIMER OUT
FEEDBACK
DETECT IN
OSC CAP
GUARD1
GUARD2
HORN1
HORN2
Name
VDD
LED
VSS
I/O
SS
SS
AC Ionization Smoke Detector
Notes
with Interconnect and Timer
Test Conditions*
Input to start reduced sensitivity timer mode
Input/output to interconnected detectors
Optionally used with a resistor to adjust low-supply
threshold
Optionally used with a resistor to adjust sensitivity
during timer mode
Output to drive visible LED
Positive supply voltage
Terminal for timing resistor, sets internal bias
(affects timing)
Input for driving piezoelectric horn
Negative supply voltage
Output for driving piezoelectric horn
Complementary output for driving piezoelectric horn
Terminal for charging/discharging an external
capacitor to run the oscillator
Optionally used with a resistor to adjust sensitivity
for a specific chamber
Active guard 1 for detector input
Input from detector chamber
Active guard 2 for detector input
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Function
–0.3 to V
–55 to 125
–0.5 to 15
0 to 50
Rating
150
10
DD
+ 0.3
Value Units
38
Units
mA
ºC
ºC
ºC
V
V
ºC/W
2