MC14467-1_07 Datasheet, PDF (4/9 Pages) Freescale Semiconductor, Inc – Low-Power CMOS Ionization Smoke Detector IC

Table 4. Timing Parameters
(C = 0.1 µF, R_bias = 8.2 MΩ, V_DD = 9.0 V, T_A = 25°C, See Figure 7)
Characteristics
Symbol
Min
Typ⁽¹⁾
Max
Oscillator Period
No Smoke
t_CI
Smoke
1.34
1.67
2.0
32
40
48
Oscillator Rise Time
Horn Output
(During Smoke)
LED Output
Horn Output
(During Low Battery)
t_R
8.0
10
12
On Time
PW_ON
120
160
208
Off Time
PW_OFF
60
80
104
Between Pulses
t_LED
32
40
48
On Time
PW_ON
8.0
10
12
On Time
t_ON
Between Pulses
t_OFF
8.0
10
12
32
40
48
1. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
Units
s
ms
ms
ms
ms
s
ms
ms
s
100.0
10.0
1.0
V_DD = 9.0 V_DC
V_DD = 7.2 V_DC
T_A = 25°C
0.1
0 1 2 3 4 5 6 7 8 9 10
V_DS, Drain To Source Voltage (V_DC)
Figure 3. Typical LED Output I-V Characteristic
1000.0
100.0
V_DD = 9.0 V_DC
TA = 25°C
10.0
1.0
V_DD = 9.0 V_DC or 7.2 V_DC
T_A = 25°C
0.1
P-CH Source
And N-CH
Sink Current
0.01
0 1 2 3 4 5 6 7 8 9 10
V_DS, Drain To Source Voltage (V_DC)
Figure 4. Typical Comparator Output I-V Characteristic
1000.0
100.0
V_DD = 9.0 V_DC
T_A = 25°C
10.0
V_DD = 7.2 V_DC
10.0
V_DD = 7.2 V_DC
P-CH Source Current
1.0
0 1 2 3 4 5 6 7 8 9 10
N-CH Sink Current
1.0
0 1 2 3 4 5 6 7 8 9 10
V_DS, Drain To Source Voltage (V_DC)
V_DS, Drain To Source Voltage (V_DC)
Figure 5. Typical P Horn Driver Output I-V Characteristic
MC14467-1
4
Sensors
Freescale Semiconductor