MC145018 Motorola, MC145018 Datasheet - Page 6

• Manufacturer Part Number: MC145018
• Description: LONIZATION SMOKE DETECTOR IC WITH INTERCONNECT AND TEMPORAL HORN DRIVER
• Manufacturer: Motorola

NOTES:
MC145018
6
LOW BAT – Y
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 once per cycle (1.65 sec for no smoke, 40 msec for smoke).
3. For timing under remote conditions, refer to MC14468 data sheet.
HORN – ON
SMOKE – N
LED – OFF
TRADITIONAL 4/6 HORN
MODULATION PATTERN
NFPA72: TEMPORAL HORN
MODULATION PATTERN
PIN 12
PIN 13
– OFF
HYST
– ON
OSC
167 msec
– Y
– N
0.5 SEC
1
LOW BATTERY CHIRP
NO SMOKE, LOW BATTERY
2
0.5 SEC
3
4
83 msec
5
&
0.5 SEC
Freescale Semiconductor, Inc.
6
24 CLOCKS
For More Information On This Product,
7
Figure 6. MC145018 Timing Diagram
8
Figure 7. Horn Modulation
0.5 SEC
Go to: www.freescale.com
NO LOW BAT
9
NO SMK
23
NFPA MOD
0.5 SEC
24 1
%
&
(
[
100 mV LEVEL SHIFT)
6
LATCH ALARM CONDITION
SMOKE
24 CLOCKS
12
1.5 SEC
18
Motorola Sensor Device Data
(NOTE 1)
24
NO SMK
LOW BAT – Y
HORN – ON
SMOKE – N
LED – OFF
PIN 12
– OFF
– ON
OSC
– N
– Y