RE46C163 데이터 시트보기 (PDF) - Microchip Technology

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RE46C163

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

Microchip Technology 

RE46C162/163

RE46C162 Typical Application – 2/3 Duty Cycle Continuous Tone Horn Pattern

To Other

Units

R7

100

Dled

R2

390

+

9V

Battery -

1 µF

C2

R1

8.2M

R5

100K

TEST and HUSH R6

68K

1 TSTART

2 IO

3 TONE

4 TSTROBE

5 LED

6 VDD

7 RBIAS

8 FEED

GUARD2 16

DETECT 15

GUARD1 14

VSEN 13

OSCAP 12

HS 11

HB 10

VSS 9

R9

C3

.1 µF

R3 R4

C1

1.5M 220K .001 µF

Note 1:

2:

3:

4:

5:

Select R5 and R6 for the correct level to test the ion chamber. The voltage level on pin 1 (TSTART) must be

greater than the VIH level to initiate the timer. Pin 1 has an internal 180K nominal pull down which must be

considered.

Select R9 to reduce sensitivity during the timer mode.

R3, R4 and C1 are typical values and may be adjusted to maximize sound pressure.

C2 should be located as close as possible to the device power pins.

Route the pin 8 PC board trace away from pin 7 to avoid coupling.

DS22245A-page 4

 2010 Microchip Technology Inc.

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