MC145010P データシートの表示（PDF） - Freescale Semiconductor
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MC145010P Datasheet PDF : 12 Pages
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Table 3. AC Electrical Characteristics
Reference Timing Diagram Figure 6 and Figure 7. (TA = 25°C, VDD = 9.0 V, Component values from Figure 8: R1 = 100.0 KΩ,
C3 = 1500.0 pF, R2 = 10.0 MΩ.)
No.
Characteristics
1 Oscillator Period(1)
Free-Running Sawtooth Measured at Pin 12
LED Pulse Period
2
No Local Smoke, and No Remote Smoke
3
Remote Smoke, but No Local Smoke
4
Local Smoke or Push Button Test
5 LED Pulse Width and Strobe Pulse Width
IRED Pulse Period
6
Smoke Test
7
Chamber Sensitivity Test without Local Smoke
8
Push Button Test
9 IRED Pulse Width
10 IRED Rise Time
IRED Fall Time
11 Silver and Brass Modulation Period
Local or Remote Smoke
11 Silver and Brass Duty Cycle
12 Local or Remote Smoke
13 Silver and Brass Chirp Pulse Period
Low Supply or Degraded Chamber Sensitivity
14 Silver and Brass Chirp Pulse Width
Low Supply or Degraded Chamber Sensitivity
15 Rising Edge on I/O to Smoke Alarm Response Time
Remote Smoke, No Local Smoke
Strobe Out Pulse Period
16 Smoke Test
17 Chamber Sensitivity Test without Local Smoke
18 Low Supply Test without Local Smoke
19 Push Button Test
Symbol
1/fOSC
tLED
tw(LED),
tw(STB)
tIRED
tw(IRED)
tr
tf
tMOD
tON/tMOD
tCH
tw(CH)
tRR
tSTB
Clocks
1
4096
—
64
1
1024
4096
32
Tf1
—
—
—
—
4096
1
—
1024
4096
4096
—
Min
9.5
38.9
—
0.60
9.5
9.67
38.9
0.302
94
—
—
297
73
38.9
9.5
—
9.67
38.9
38.9
0.302
Max
11.5
47.1
—
0.74
11.5
11.83
47.1
0.370
116
30
200
363
77
47.1
11.5
800
11.83
47.1
47.1
0.370
Unit
ms
s
ms
s
µs
µs
ms
%
s
ms
ms
s
1. Oscillator Period T (= Tr + Tf) is determined by the external components R1, R2, and C3 where Tr = (0.6931) R2 x C3 and
Tf = (0.6031) R1 x C3.
The other timing characteristics are some multiple of the oscillator timing shown in the table.
MC145010
4
Sensors
Freescale Semiconductor
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