5366

PHOTOELECTRIC SMOKE DETECTOR

with INTERCONNECT and TIMER

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

8

TYPICAL APPLICATION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

OSC. &

TIMING

HORN

DRIVER

LOGIC

Dwg. EC-006

TO/FROM

OTHER

UNITS

9 V

PUSH

TO

TEST

V

DD

CONNECT FOR TIMER MODE OR "HUSH" OPERATION

CONNECT FOR

NON-TIMER MODE

OPERATION

SMOKE

CHAMBER

1k

Ω

100

µF

100k

Ω

1000pF

220k

Ω

560

Ω

200k

Ω

220

Ω

+

+

The Diagnostic Test Mode is initiated by pulling this

pin for at least one clock cycle on the OSC. CAP. pin.

This mode is used to facilitate calibration and test of the

IC and the assembled detector. In this mode, certain

device pins are reconfigured as described below. In this

CAP. cycle and the STROBE pin is always active. To exit

this mode, the test pin is floated for at least one OSC.

CAP. cycle.

Pin Name

Pin No. Configuration

8

This pin is reconfigured as the

smoke integrator output. Three

consecutive smoke detections

will cause this pin to go high

and three consecutive no-

smoke detections cause this

pin to go low.

LED

11

This pin becomes a low-battery

indicator. The open-drain

NMOS output is normally OFF.

battery threshold, the output

turns ON.

PIN AND CIRCUIT DESCRIPTION, continued