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MC14568 Datasheet(PDF) 3 Page - Freescale Semiconductor, Inc

Part No. MC14568
Description  Low-Power CMOS Ionization Smoke Detector with Interconnect and Timer
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC14568 Datasheet(HTML) 3 Page - Freescale Semiconductor, Inc

 
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Sensors
Freescale Semiconductor
3
MC14568
Table 2. Electrical Characteristics
Characteristics noted under conditions TA = +25°C, VDD = 9.0 V, VSS = 0 V, C12 = 0.1 µF (Oscillator Pin) R7 = 8.2 mΩf/fn (timing
resistor pin) unless otherwise noted.
Symbol
Characteristic
Test Condition
Test
Pin
Min
Typ
Max
Unit
VDD
Supply Voltage Range
Operating
6
6.0
9.0
12
V
IIN
Detector Input Current
0 to 40% RH,
VIN = 0 to 9.0 V
15
1.0
pA
VOS
Input Offset Voltage
Active Guard
Active Guard
Detect Comparator
14 – 15
16 – 15
15 – 13
100
100
50
mV
VHYS
Hysteresis
No Alarm to Alarm
13
80
130
160
mV
VCM
Common Mode Range
Guard Amplifier
Smoke Comparator
14 – 15
13 – 15
0.5
0.5
VDD – 2.0
VDD – 2.0
V
LO-Z
HI-Z
Active Guard Impedance
To VCC
To VCC
14
16
10
500
k
tCL
Oscillator Period
No Alarm
Alarm
12
1.34
32
1.67
40
2.0
48
s
ms
Timer Out Pulse Width
4
8.0
10
12
ms
Timer Period
After Pin 1 High to Low,
No Smoke
4
6.43
10
min
VTH
Low Voltage Threshold
TA = 0 to 50°C
6
7.2
7.8
V
Sensitivity Adj. Voltage
V13/VDD, Pin 3 Open Circuit
13
48.5
50
51.5
%
Low Battery Threshold
Pin 3 Open Circuit
3
60.6
63
65.6
%
Horn Output Voltage
IOUT = 16 mA, VDD = 9.0 V
IOUT = 16 mA, VDD = 7.2 V
IOUT = -16 mA, VDD = 9.0 V
IOUT = -16 mA, VDD = 7.2 V
10 – 11
8.5
6.3
0.1
8.8
0.5
0.9
V
PWON
Horn Output ON Time
Alarm
Low Battery
10 – 11
450
8.0
500
10
550
12
ms
PWOFF
Horn Output OFF Time
Alarm
Alarm
Low Battery
10 – 11
450
1350
32
500
1500
40
550
1650
48
ms
Feedback
VIH
VIL
86.3
2.7
V
Timer Start Logic Levels
VIH
VIL
14.5
2.5
V
Timer Start Input Current
VIN = 9.0 V
1
20
80
µA
Timer Out Output Current
VOUT = 0.5 V
4
500
µA
ILON
LED Output ON Current
VDD = 7.2 V, VOUT = 1.0 V
5
10
mA
tLON
LED Output ON Time
No Local Alarm, Not Latched
5
8.0
10
12
ms
tLOFF
LED Output OFF Time
No Alarm, Standby
No Alarm, Timer Mode
532
8.0
40
10
48
12
s


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