参数资料
| 型号： | MC1455BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC OSC MONO TIMING 8-SOIC |
| 标准包装： | 1 |
| 类型： | 555 型，计时器/振荡器（单路） |
| 电源电压： | 4.5 V ~ 16 V |
| 电流 - 电源： | 10mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SOICN |
| 安装类型： | 表面贴装 |
| 产品目录页面： | 1129 (CN2011-ZH PDF) |
| 其它名称： | MC1455BDR2GOSDKR |
MC1455, MC1455B, NCV1455B
http://onsemi.com
6
C,
CAP
ACIT
ANCE
(
F) μ
Figure 15. Monostable Waveforms
Figure 16. Time Delay
Figure 17. Astable Circuit
Figure 18. Astable Waveforms
(RA = 10 kW, C = 0.01 mF, RL = 1.0 kW, VCC = 15 V)
(RA = 5.1 kW, C = 0.01 mF, RL = 1.0 kW; RB = 3.9 kW, VCC = 15 V)
t = 20
ms/cm
t = 50
ms/cm
100
10
1.0
0.1
0.01
0.001
10
ms 100 ms 1.0 ms 10 ms
100 ms
1.0
10
100
td, TIME DELAY (s)
RL
+VCC (5.0 V to 15 V)
Reset
VCC
8
7Discharge
6Threshold
5
Control
Voltage
1
2
Trigger
Output
3
4
RA
RL
MC1455
C
RB
Astable Mode
In the astable mode the timer is connected so that it will
retrigger itself and cause the capacitor voltage to oscillate
between 1/3 VCC and 2/3 VCC. See Figure 17.
The external capacitor changes to 2/3 VCC through RA and
RB and discharges to 1/3 VCC through RB. By varying the
ratio of these resistors the duty cycle can be varied. The
charge and discharge times are independent of the supply
voltage.
The charge time (output high) is given by:
t1 + 0.695(RA ) RB)C
The discharge time (output low) is given by:
t2 + 0.695(RB)C
Thus the total period is given by:
T + t1 ) t2 + 0.695(RA ) 2RB)C
The frequency of oscillation is then:
f +
1
1 +
1.44
(RA ) 2RB)C
and may be easily found as shown in Figure 19.
The duty cycle is given by:
DC +
RB
RA ) 2RB
To obtain the maximum duty cycle RA must be as small as
possible; but it must also be large enough to limit the
discharge current (Pin 7 current) within the maximum rating
of the discharge transistor (200 mA).
The minimum value of RA is given by:
RA w
VCC(Vdc)
I7 (A)
w
VCC(Vdc)
0.2
Figure 19. Free Running Frequency
C,
CAP
ACIT
ANCE
(
F) μ
100
10
1.0
0.1
0.01
0.001
(RA + 2 RB)
0.1
1.0
10
100
1.0 k
10 k
100
f, FREE RUNNING FREQUENCY (Hz)
相关PDF资料 |
PDF描述 |
|---|---|
| D38999/24KH53PC | CONN RCPT 53POS JAM NUT W/PINS |
| VE-BTL-MY-S | CONVERTER MOD DC/DC 28V 50W |
| VE-BTK-MY-S | CONVERTER MOD DC/DC 40V 50W |
| MC14541BDR2G | IC OSC PROG TIMER 3MHZ 14SOIC |
| LM555CMX | IC OSC MONO TIMING 8-SOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC1455BP1 | 功能描述:计时器和支持产品 ANA TIMING CIRCUIT RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| MC1455BP1G | 功能描述:计时器和支持产品 ANA TIMING CIRCUIT RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| MC1455BP1G | 制造商:ON Semiconductor 功能描述:Timer IC |
| MC1455D | 功能描述:计时器和支持产品 ANA TIMING CIRCUIT RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| MC1455DG | 功能描述:计时器和支持产品 ANA TIMING CIRCUIT RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。