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MC145012 Fiches technique(PDF) 5 Page - Freescale Semiconductor, Inc

No de pièce MC145012
Description  Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC145012 Fiches technique(HTML) 5 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor
5
MC145012
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 = 7.5 MΩ).
No.
Parameter
Symbol
Test Condition
Clocks
Min (6)
Typ (7)
Max(6)
Unit
1
Oscillator Period
1/FOSC
Free-Running Sawtooth
Measured at Pin 12
1.0
7.0
7.9
8.6
ms
2
LED Pulse Period
TLED
No Local Smoke, and
No Remote Smoke
4096
28.8
32.4
35.2
s
3
Remote Smoke, but
No Local Smoke
Extinguished
4
Local Smoke
64
0.45
5
Push-button Test
64
0.45
6
LED Pulse Width and Strobe
Pulse Width
TW(LED),
TW(STB)
1.0
7.0
8.6
ms
7
IRED Pulse Period
TIRED
Smoke Test
1024
7.2
8.1
8.8
s
8
IRED Pulse Period
TIRED
Chamber Sensitivity Test,
without Local Smoke
4096
28.8
32.4
35.2
s
9
Push-button Test
128
0.9
1.0
1.1
10
IRED Pulse Width
TW(IRED)
TF*
94
116
µs
11
IRED Rise Time
TR
30
12
IRED Fall Time
TF
200
µs
13
Silver and Brass Temporal
Modulation Pulse Width
TON
64
0.45
0.5
0.55
s
14
TOFF
0.45
0.5
0.55
15
TOFFD
192
1.35
1.52
1.65
16
Silver and Brass Chirp Pulse
Period
TCH
Low Supply or Degraded
Chamber Sensitivity
4096
28.8
32.4
35.2
s
17
Silver and Brass Chirp Pulse
Width
TWCH
1
7.0
7.9
8.6
ms
18
Rising Edge on I/O to Smoke
Alarm Response Time
TRR
Remote Smoke,
No Local Smoke
2.0 (8)
s
19
Strobe Out Pulse Period
TSTB
Smoke Test
1024
7.2
8.1
8.8
s
20
Chamber Sensitivity Test,
without Local Smoke
4096
28.8
32.4
35.2
21
Low Supply Test,
without Local Smoke
4096
28.8
32.4
35.2
22
Push-button Test
1.0
Notes
6. 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. The timing shown should accommodate
the NFPA 72, ANSI S3.41, and ISO 8201 audible emergency evacuation signals.
7. Typicals are not guaranteed.
8. Time is typical - depends on what point in cycle signal is applied.


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Numéro de composants électroniques

No de pièceDescriptionHtml ViewFabricant
MC145010 Photoelectric Smoke Detector IC with I/O 1  2  3  4  5  More Freescale Semiconductor, Inc
MC145011 Photoelectric Smoke Detector IC with I/O For Line-Powered Applications 1  2  3  4  5  More Freescale Semiconductor, Inc

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