RE46C129

CMOS Ionization Smoke Detector ASIC with Interconnect

R&E International

Product Specification

A Subsidiary of Microchip Technology Inc.

© 2009 Microchip Technology Inc.

DS22172A-page 3

AC Electrical Characteristics at TA = 25°C, VDD=9V, OSCAP=.1uF, RBIAS=8.2MΩ, VSS=0V (unless

otherwise noted)

Limits

Parameter

Symbol

Test

Pin

Test Conditions

Min

Typ

Max

Units

12

No Alarm Condition

1.34

1.67

2

S

Oscillator Period

12

Alarm Condition

37.5

41.5

45.8

mS

Oscillator Pulse Width

5

Operating

9.4

10.5

12.9

mS

LED On Time

5

Operating

9.4

10.5

12.9

mS

5

Standby, No Alarm

32

40

48

S

LED Off Time

5

Alarm Condition

.8

1

1.2

S

10,11

Operating, Alarm Condition

141

166

190

mS

Horn On Time

10,11

Low Battery, No Alarm

9.4

10.5

12.9

mS

10,11

Operating, Alarm Condition

71

83

95

mS

Horn Off Time

10,11

Low Battery, No Alarm

32

40

48

S

IO Charge Dump Duration

2

At Conclusion of Local Alarm or Test

1.34

1.67

2.0

S

IO Delay

2

From Start of Local Alarm to IO Active

3

S

IO Filter

2

IO pulse width guaranteed to be filtered.

IO as Input, No Local Alarm

450

mS

Remote Alarm Delay

2

No Local Alarm, IO as input, From IO

active to Horn Active

.450

2.2

S