MC146012 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC146012

Low Power CMOS Photoelectric Smoke Detector IC

Freescale Semiconductor 

R8

8.2 kΩ

C4 +

C1 R15 22 µF

C2 R14

R9

5.0 kΩ

1 MΩ

C1

R11

R12

1.0 kΩ

R10

4.7 kΩ

IR Emitter

D2

IR Detector

C5

100 µF

D3

Q1

IR Current

4.7 to 22 Ω

To other

MC146012(s)

Escape light(s)

Auxiliary Alarm(s)

Remote(s)

And/Or Dialer

C2

DETECT

STROBE

VDD

IRED

I/O

BRASS

Silence Feature

(Option)

9.0 V

B1

D1

Reverse

Polarity

Protect.

Circuit

SW1

Pushbutton

Test

TEST & SILENCE

LOWBATT

SW2

R16 = 3.0 MΩ

Silence

Button

R6

100 kΩ

MC146012

VSS

R1

OSC

LED

FEEDBACK

SILVER

C3 = 1500 pF

R1 = 100 kΩ

R2 = 10 MΩ

D4

R3 = 470 Ω

R4 = 2.2 MΩ

C6

0.01 µF

HORN

X1

R7

47 kΩ

Visible

LED

R5 = 100 kΩ

Figure 5. Typical Battery Powered Application

# Values for R4, R5 and C6 may differ depending on type of horn used.

* C2 and R13 are used for coarse sensitivity adjustment. Typical values are shown.

† R9 is for fine sensitivity adjustment (optional). If fixed resistors are used, R8 = 12k, R10 is 5.6k to 10k and R9 is eliminated.

** Components necessary to utilize IMF feature.

MC146012

8

Sensors

Freescale Semiconductor

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