A5358 查看數據表（PDF） - Allegro MicroSystems

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A5358

Photoelectric Smoke Detector with Interconnect and Timer

Allegro MicroSystems 

A5358

Photoelectric Smoke Detector

with Interconnect and Timer

AC ELECTRICAL CHARACTERISTICS (continued) at TA = –25°C to 75°C1, VSS = 0 V, in typical application (unless otherwise noted)

Characteristic

Symbol

Test Conditions

Test Pin VDD Min. Typ.2 Max. Units

tired1

No local or remote smoke

6

9

9.6

–

11.9

s

tired2

After 1 of 3 valid samples

6

9

2.42 2.70 2.96

s

IRED Pulse Period

tired3

After 2 of 3 valid samples and during local

alarm

6

9

1.21 1.34 1.47

s

tired4

Remote smoke only

6

9

9.67 10.8 11.8

s

tired5

Chamber test, no local alarm

6

9

38.9

–

47.1

s

tired6

Pushbutton test, induced alarm

6

9

300 336 370 ms

IRED Pulse Width

tw(ired)

6

9

94

–

116 μs

IRED Rise Time

tr(ired)

10% to 90%

6

–

–

30

μs

IRED Fall Time

tf(ired)

90% to 10%

6

–

–

200 μs

I/O to Active Delay

td(io)

Local alarm

7

9

–

0

–

s

Rising Edge on I/O to Alarm

tr(io)

No local alarm

7

9

–

–

13 ×

tOSC

s

Horn Warning Pulse Period

thorn

Low battery or degraded chamber sensitivity

8, 9

9

38.9

–

47.1

s

Horn Warning Pulse Width

tw(horn)

Low battery or degraded chamber sensitivity

8, 9

9

9.5

–

11.5 ms

Horn On-Time

ton(horn)

Local or remote alarm

8, 9

9

–

252

–

ms

Horn Off-Time

toff(horn)

Local or remote alarm

8, 9

9

–

84

–

ms

1Limits over the operating temperature range are based on characterization data. Characteristics are production tested at 25°C only.

2Typical values are at 25°C and are given for circuit design information only.

Allegro MicroSystems, Inc.

6

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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