Photoelectric Smoke Detector

with Interconnect and Timer

A5366

5

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Line Regulation

6

–

–35

–

dB

IRED Temperature Coefficient

6

–

–

0.40

–

%/°C

High-Level Output Current

7

9

–4.0

–

–

mA

OFF Leakage Current High

11, 13

12

–

–

1.0

μA

OFF Leakage Current Low

11, 13

12

–

–

–1.0

μA

Low-Battery Alarm Threshold

5

–

6.9

7.2

7.5

V

Common Mode Voltage

Any alarm condition

1, 2, 3

-

– 4

–

– 2

V

Smoke Comparator

Reference Voltage

Any alarm condition

Internal

-

– 3.7

–

– 3.3

V

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.

Characteristic

Symbol

Test Conditions

Test Pin

Min.

Max.

Units

Characteristic

Symbol

Test Conditions

Test Pin

Min.

Max.

Units

Oscillator Period

12

9

9.4

10.5

11.5

ms

LED Pulse Period

No local or remote smoke

11

9

39

–

48

s

Local smoke

11

9

0.45

0.50

0.55

s

Remote smoke only

11

9

–

No LED

Pulses

–s

Pushbutton test, induced alarm

11

9

0.45

0.50

0.55

s

Timer mode, no alarm

11

9

9.67

10.75

11.83

s

LED Pulse Width

11

9

9.5

–

11.5

ms

STROBE Pulse Period

No local or remote smoke

4

9

9.6

–

11.9

s

After 1 of 3 valid samples

4

9

1.8

2.0

2.2

s

After 2 of 3 valid samples and during local

alarm

4

9

0.8

1.0

1.1

s

Remote smoke only

4

9

7.2

8.0

8.9

s

Chamber test or low battery test, no local

alarm

4

9

38.9

–

47.1

s

Pushbutton test, induced alarm

4

9

225

252

278

ms

STROBE Pulse Width

4

9

9.5

–

11.5

ms

Continued on the next page…