MC145011P 查看數據表（PDF） - Freescale Semiconductor

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MC145011P

Photoelectric Smoke Detector IC with I/O For Line-Powered Applications

Freescale Semiconductor 

C1

0.047 µF

1 TO 22 µF +

SW1

C4**

V+

C2*

4700 pF

1

C1

R14

R8

560 Ω

8.2 k

2

C2

R9†

R11 250 k

5k

3

DETECT

R10

D1

4.7 k

IR DETECTOR

4

STROBE

R12

1k

C5 +

100 µF

D2

IR Emitter

5

VDD

Q1

6

IRED

IR R13*

Current 4.7 TO 22

To Other

MC145011(S),

Escape Light (S),

Auxiliary Alarm (S),

Remote Alarm (S),

And/or Auto-dialer

7

I/O

8

BRASS

16

TEST

LOW-SUPPLY 15

TRIP

MC145011

14

VSS

13

R1

12

OSC

11

LED

10

FEEDBACK

9

SILVER

Push button

Test

R1

100 k

C3

1500 pF

R2

10 M

R3

470

R4

100 k

0.01 µF

C6 

2.2 M

R5 

R6

100 k

R7

47 k

D3

Visible

LED

Horn

X1

 Values for R4, R5, and C6 may differ depending on type of piezoelectric 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 = 12 k, R10 is 5.6 k to 10 k, and R9 is eliminated. When R9 is used, noise

pickup is increased due to antenna effects. Shielding may be required.

** C4 should be 22 µF if B1 is a carbon battery. C4 could be reduced to 1 µF when an alkaline battery is used.

Figure 8. Typical Application

Sensors

Freescale Semiconductor

MC145011

9

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