MPXM2102AS datasheet(606/670 Pages) MOTOROLA

606 / 670 page

MC14468

4–14

Motorola Sensor Device Data

www.motorola.com/semiconductors

Figure 6. Timing Diagram

Hysteresis (Internal)

(Pin 13 ) (Pin 14)

Detect Out

(Pin 1)

Low Battery

(Internal)

Sample (Internal)

Smoke

Horn

(Pin 10 and 11)

LED

(Pin 5)

Oscillator

(Pin 12)

Standby

Smoke/No Low Battery

Smoke/Low Battery

No Smoke/

No Low Battery

No Smoke/Low Battery

40 ms

10 ms

1.67 s

24 Clock Cycles (0.96 s)

24 Clock Cycles

(40S)

24 Clock Cycles

6 Clock

Suppressed Chirp

Battery Test

(Note 3)

(Note 1)

Cycles (10.0 s)

Strobe Out

(Pin 14)

I/O (Pin 2)

Output (Local)

I/O (Pin 2)

Input (Remote)

LED

Note: Horn Modulation Not Self–Completing

Low = Disable

High = Enable

(Suppressed LED for Remote Only)

NOTES:

1. Horn modulation is self–completing. When going from smoke to no smoke, the alarm condition will terminate only when horn is off.

2. Comparators are strobed on once per clock cycle (1.67 s for no smoke, 40 ms for smoke).

3. Low battery comparator information is latched only during LED pulse.

X 100 mV p–p swing.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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