RE46C167TSW16F datasheet(7/30 Pages) MICROCHIP

Part #	RE46C167TSW16F

Description	CMOS Photoelectric Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2010 Microchip Technology Inc.

DS22251A-page 7

RE46C165/6/7/8

AC ELECTRICAL CHARACTERISTICS

AC Electrical Characteristics:

Unless otherwise indicated, all parameters apply at TA = -25° to 75°, VDD = 9V,

Typical Application (unless otherwise noted), VSS = 0V.

Parameter

Symbol

Test

Min

Typ

Max

Units

Clocks

Conditions

Oscillator Time Base (COSC, ROSC)

Oscillator Period

TPOSC

9

9.38

10.42 11.46

ms

1

Operating, Note 1

Oscillator Tolerance

TTOLOSC

9

-10

0

10

%

1

Operating

LED Indication (LED)

LED On Time

TON1

11

9.4

10.4

11.5

ms

1

Operating

LED Period

TPLED0

11

LED IS NOT ON

s

—

Remote alarm only

TPLED1

11

38

43

47

s

4096

Standby, no alarm

TPLED2

11

450

500

550

ms

48

Local alarm condition

TPLED3

11

9.6

10.7

11.7

s

1024

Timer mode, no local alarm

TPLED4

11

225

250

275

ms

24

Timer mode, no local alarm

Alarm Memory LED

Pulse Train (3x)

Off Time

TOFLED

11

1.2

1.3

1.5

s

127

Alarm memory set,

LED enabled

Alarm Memory LED

Timer Period

TLALED

11

21.5

23.9

26.3

Hours 8257536 Alarm memory set

Detection (STROBE, IRED)

STROBE On Time

TSTON

4

9.4

10.4

11.5

ms

1

Smoke test,

Chamber test

IRED On Time

TIRON

6

94

104

114

µs

0.01

Operating/DIAG, Note 1

Note 1:

TPOSC and TIRON are 100% production tested. All other timing is verified by functional testing.

2:

See timing diagram for Horn Temporal Pattern in Figure 3-2.

3:

See timing diagram for Horn Continuous Pattern in Figure 3-3.

4:

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

conclusion of the Timer mode.

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