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参数资料
| 型号： | MC145011DW |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封装： | PLASTIC, SOIC-16 |
| 文件页数： | 7/12页 |
| 文件大小： | 346K |
| 代理商： | MC145011DW |
Sensors
4
Freescale Semiconductor
MC145011
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 K,
C3 = 1500.0 pF, R2 = 10.0 M
)
No.
Characteristic
Symbol
Test Condition
Min
Max
Unit
1
Oscillator Period(1)
1. 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.
1/fosc
Free-Running Sawtooth
Measured at Pin 12
9.5
11.5
ms
2
LED Status
tLED
No Local Smoke, and
No Remote Smoke
Illuminated
3
Remote Smoke, but
No Local Smoke
Illuminated
4
Local Smoke or
Pushbutton Test
Extinguished
5
Strobe Pulse Width
tw(stb)
9.5
11.5
ms
6
IRED Pulse Period
tIRED
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
IRED Pulse Width
tw(IRED)
94
116
s
10
IRED Rise Time
tr
—
30
s
IRED Fall Time
tf
—
200
11
Silver and Brass Modulation Period
tmod
Local or Remote Smoke
297
363
ms
11, 12 Silver and Brass Duty Cycle
ton/tmod
Local or Remote Smoke
73
77
%
13
Silver and Brass Chirp Pulse Period
tCH
Low Supply or Degraded
Chamber Sensitivity
38.9
47.1
s
14
Silver and Brass Chirp Pulse Width
tw(CH)
Low Supply or Degraded
Chamber Sensitivity
9.5
11.5
ms
15
Rising Edge on I/O to Smoke Alarm Response Time
tRR
Remote Smoke,
No Local Smoke
—
800
ms
16
Strobe Pulse Period
tstb
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
Table 4. Pin Description
Pin No.
Pin Name
Description
1
C1
A capacitor connected to this pin as shown in Figure 8. determines the gain of the on-chip photo amplifier during
pushbutton test and chamber sensitivity test (high gain). The capacitor value is chosen such that the alarm is tripped
from background reflections in the chamber during pushbutton test.
Av ≈ 1 + (C1/10) where C1 is in pF. CAUTION: The value of the closed-loop gain should not exceed 10,000.
2
C2
A capacitor connected to this pin as shown in Figure 8. determines the gain of the on-chip photo amplifier except during
pushbutton or chamber sensitivity tests.
Av ≈ 1 + (C2/10) where C2 is in pF. This gain increases about 10% during the IRED pulse, after two consecutive local
smoke detections.
Resistor R14 must be installed in series with C2. R14
≈ [1/(12√C2)] - 680 where R14 is in ohms and C2 is in farads.
3
DETECT
This input to the high-gain pulse amplifier is tied to the cathode of an external photodiode. The photodiode should have
low capacitance and low dark leakage current. The diode must be shunted by a load resistor and is operated at zero
bias.
The Detect input must be ac/dc decoupled from all other signals, VDD, and VSS. Lead length and/or foil traces to this pin
must be minimized, also. See Figure 9.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC145011ED | 功能描述:光电传感器 SMOKE DETECTOR RoHS:否 制造商:Omron Industrial 感应方式:Retroreflective 感应距离:2 m 光源:Infrared LED 放大器类型: 连接:Prewired Cable 输出配置:Light ON |
| MC145011P | 功能描述:IC SMOKE DETECT PHOTOELEC 16-DIP RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC145012DW | 功能描述:IC SMOKE DETECT WITH I/O 16SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC145012DWR2 | 制造商:Rochester Electronics LLC 功能描述:PHOTO SMKE DET/NFPA TONE - Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC145012ED | 功能描述:烟雾报警器 SM DETECTOR W/NFPA TONE RoHS:否 制造商:ELMOS Semiconductor 描述/功能:Smoke detector controller 感应方式:Photoelectric 工作电源电压:24 V 输出信号类型: |
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