RE46C144 查看數據表（PDF） - Microchip Technology

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RE46C144

CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode

Microchip Technology 

RE46C144

TABLE 1-1: AC ELECTRICAL CHARACTERISTICS

AC Electrical Characteristics: Unless otherwise indicated, all parameters apply at TA = -25°C to +75°C, VDD = 9V,

VSS = 0V, Component Values from Typical Application; R9 = 100 K, R12 = 10 M, C5 = 1.5 nF.

Parameter

Symbol

Test

Pin

Min

Typ

Max Units

Conditions

Oscillator Period

TPOSC

12

9.4

LED and

STROBE On Time

TON1

11, 4

9.4

10.5

11.5

10.5

11.5

ms No alarm condition

ms Operating

LED Period

TPLED1

11

TPLED2

11

TPLED3

11

TPLED4

11

STROBE and IRED

TPER1

4, 6

Pulse Period

TPER1A 4, 6

39

43

47

.6

.67

.74

9.6

10.75

11.8

LED IS NOT ON

9.6

10.75

11.8

2.42

2.7

2.96

s Standby, no alarm

s Local alarm condition

s Timer mode, no local alarm

s Remote alarm only

s Standby, no alarm

s Standby, after one valid smoke

sample

TPER1B 4, 6

1.21

1.33

1.47

s Standby, after two consecutive

valid smoke samples

TPER2

4, 6

1.21

1.33

1.47

s In Local Alarm (three consecu-

tive valid smoke samples)

IRED On Time

TPER3

4, 6

9.7

TPER4

4, 6

300

TPER5

4, 6

39

TON2

6

94

10.5

11.8

336

370

47

104

115

s In Remote Alarm

ms Push-button Test

s Chamber Test or Low-battery

Test, no alarms

µs Operating

Horn On Time

THON1

8, 9

227

THON2

8, 9

9.5

252

277

10.5

11.5

ms Operating, alarm condition,

Note 1

ms Low Battery or Failed Chamber

Test, no alarm

Horn Off Time

THOF1

8, 9

76

84

92

ms Operating, Alarm Condition,

Note 1

THOF3

8, 9

39

43

47

s Low Battery or Failed Chamber

Test, no alarm

IO Charge Dump

TIODMP

7

.91

Duration

1.46

s At conclusion of local alarm or

test

IO Delay

TIODLY1

7

0

s From start of local alarm to IO

Active

IO Filter

TIOFILT

7

600

ms IO pulse-width ensured to be

filtered. IO as input, no local

alarm

Remote Alarm Delay TIODLY2

7

.75

1.65

s No local alarm, from IO Active

to Horn Active

Timer Period

TTPER

7

8.5

10

Min No alarm condition, Note 2

Note 1: See timing diagram for Horn Temporal Pattern

2: During the Timer mode, the LED period is 10.5 seconds. The LED period will return to 43 seconds at the

conclusion of the Timer mode.

3: TPOSC and TON2 are 100% production tested. All other timing is guaranteed by functional testing.

4: Typical values are for design information and are not ensured.

5: Limits over the specified temperature range are not production tested and are based on characterization

data.

 2009-2012 Microchip Technology Inc.

DS22180C-page 5

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