RE46C146

CMOS Photoelectric Smoke Detector ASIC with

R&E International

Intelligent IO and Timer Mode

A Subsidiary of Microchip Technology Inc.

Product Specification

© 2009 Microchip Technology Inc.

DS22176A-page 4

AC Electrical Characteristics at TA =-25° to 75°, VDD=9V, VSS=0V, Component Values from Figure 2 ;

R9=100KΩ, R12=10MΩ, C5= 1.5nF(unless otherwise noted)

Limits

Parameter

Symbol

Test

Pin

Test Conditions

Min

Typ

Max

Units

Oscillator Period

12

No Alarm Condition

9.4

10.5

11.5

mS

LED and STROBE On Time

11,4

Operating

9.4

10.5

11.5

mS

11

Standby, No Alarm

39

43

47

S

11

Local Alarm Condition

.45

.5

.55

S

11

Timer Mode, No Local Alarm

9.6

10.75

11.8

S

LED Period

11

Remote Alarm Only

LED IS NOT ON

S

4

Standby, No Alarm

9.6

10.75

11.8

S

4

Standby, After 1 Valid Smoke

Sample

1.8

2

2.2

S

4

Standby, After 2 Consecutive Valid

Smoke Samples

.9

1

1.1

S

4

In Local Alarm – (3 Consecutive

Valid Smoke Samples)

.9

1

1.1

S

4

In Remote Alarm

7.2

8

8.9

S

STROBE and IRED Pulse

Period

4

Pushbutton Test

300

336

370

mS

IRED On Time

6

Operating

94

104

115

uS

8,9

Operating, Alarm Condition, Note 1

450

500

550

mS

8,9

Low Battery or Failed Chamber

Test , No Alarm

9.4

10.5

11.5

mS

Horn On Time

8,9

Operating, CO Interconnect Alarm

Condition, Note 1

90

100

110

mS

8,9

Operating, Alarm Condition, Note 1

450

500

550

mS

8,9

Operating, Alarm Condition, Note 1

1.35

1.5

1.65

S

8,9

Low Battery or Failed Chamber

Test, No Alarm

39

43

47

S

8,9

Operating, CO Interconnect Alarm

Condition, Note 1

90

100

110

mS

Horn Off Time

8,9

Operating, CO Interconnect Alarm

Condition, Note 1

4.59

5.1

5.61

S

IO Delay

7

From Start of Local Alarm to IO

Active

0

S

IO Pulse on Time for CO

Alarm

7

No local alarm, 2 valid pulses

required for CO

46.2

590

mS

IO Pulse Off Time for CO

Alarm

7

IO=low

3.7

S

IO Charge Dump Duration

7

At Conclusion of Local Alarm or

Test

1.2

1.35

1.5

S

Remote Alarm Delay

7

No Local Alarm, From IO Active to

Alarm

1.05

1.5

2.0

S

Timer Period

No Alarm Condition

8

10

12

Min

Note 1 – See timing diagram for smoke alarm Horn Temporal Pattern

Typical values are for design information and are not guaranteed.

Limits over the specified temperature range are not production tested and are based on characterization data.