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MPXM2102AS Datasheet(PDF) 629 Page - Motorola, Inc

Part # MPXM2102AS
Description  Sensor
PDF  670 Pages
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MPXM2102AS Datasheet(HTML) 629 Page - Motorola, Inc

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MC145011
4–37
Motorola Sensor Device Data
www.motorola.com/semiconductors
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
Min
Max
Unit
1
1/fosc
Oscillator Period*
Free–Running Sawtooth
Measured at Pin 12
9.5
11.5
ms
2
tLED
LED Status
No Local Smoke, and
No Remote Smoke
Illuminated
3
Remote Smoke, but
No Local Smoke
Illuminated
4
Local Smoke or Pushbutton
Test
Extinguished
5
tw(stb)
Strobe Pulse Width
9.5
11.5
ms
6
tIRED
IRED Pulse Period
Smoke Test
9.67
11.83
s
7
Chamber Sensitivity Test,
without Local Smoke
38.9
47.1
8
Pushbutton Test
0.302
0.370
9
tw(IRED)
IRED Pulse Width
94
116
µs
10
tr
IRED Rise Time
—
30
µs
tf
IRED Fall Time
—
200
11
tmod
Silver and Brass Modulation Period
Local or Remote Smoke
297
363
ms
11, 12
ton/tmod
Silver and Brass Duty Cycle
Local or Remote Smoke
73
77
%
13
tCH
Silver and Brass Chirp Pulse Period
Low Supply or Degraded
Chamber Sensitivity
38.9
47.1
s
14
tw(CH)
Silver and Brass Chirp Pulse Width
Low Supply or Degraded
Chamber Sensitivity
9.5
11.5
ms
15
tRR
Rising Edge on I/O to Smoke Alarm Response Time
Remote Smoke,
No Local Smoke
—
800
ms
16
tstb
Strobe Pulse Period
Smoke Test
9.67
11.83
s
17
Chamber Sensitivity Test,
without Local Smoke
38.9
47.1
18
Low Supply Test,
without Local Smoke
38.9
47.1
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.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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