MC145010 查看數據表（PDF） - Motorola => Freescale
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MC145010 Datasheet PDF : 12 Pages
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MC145010
AC ELECTRICAL CHARACTERISTICS (Reference Timing Diagram Figures 3 and 4)
(TA = 25°C, VDD = 9.0 V, Component Values from Figure 5: R1 = 100.0 KΩ, C3 = 1500.0 pF, R2 = 10.0 MΩ)
No.
Symbol
Parameter
Test Condition
Clocks
Min
Max Unit
1
1/fosc
Oscillator Period*
Free–Running Sawtooth
Measured at Pin 12
1
9.5
11.5 ms
2
tLED
LED Pulse Period
No Local Smoke, and
No Remote Smoke
4096
38.9
47.1
s
3
Remote Smoke, but
—
None
No Local Smoke
4
Local Smoke or Pushbutton Test
64
0.60
0.74
5
tw(LED), LED Pulse Width and Strobe
tw(stb)
Pulse Width
6
tIRED
IRED Pulse Period
7
Smoke Test
Chamber Sensitivity Test,
without Local Smoke
1
1024
4096
9.5
11.5 ms
9.67
11.83
s
38.9
47.1
8
Pushbutton Test
32
0.302 0.370
9
tw(IRED)
IRED Pulse Width
10
tr
IRED Rise Time
tf
IRED Fall Time
11
tmod
Silver and Brass Modulation
Period
Local or Remote Smoke
Tf*
94
116
µs
—
—
30
µs
—
—
200
—
297
363
ms
11,12
13
ton/tmod
tCH
Silver and Brass Duty Cycle
Silver and Brass Chirp Pulse
Period
Local or Remote Smoke
Low Supply or Degraded
Chamber Sensitivity
—
4096
73
77
%
38.9
47.1
s
14
tw(CH)
Silver and Brass Chirp Pulse
Low Supply or Degraded
Width
Chamber Sensitivity
1
9.5
11.5 ms
15
tRR
Rising Edge on I/O to Smoke
Remote Smoke,
Alarm Response Time
No Local Smoke
—
—
800
ms
16
tstb
Strobe Out Pulse Period
17
Smoke Test
Chamber Sensitivity Test,
without Local Smoke
1024
4096
9.67
11.83
s
38.9
47.1
18
Low Supply Test,
4096
38.9
47.1
without Local Smoke
19
Pushbutton Test
—
0.302 0.370
* Oscillator period T (= Tr + Tf) is determined by the external components R1, R2, and C3 where Tr = (0.6931) R2 * C3 and Tf = (0.6931) R1 * C3.
The other timing characteristics are some multiple of the oscillator timing as shown in the table.
4
Motorola Sensor Device Data
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