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參數(shù)資料
| 型號： | TS3V555ID |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 模擬波形發(fā)生器 |
| 英文描述： | PULSE; RECTANGULAR, 2 MHz, TIMER, PDSO8 |
| 封裝： | MICRO, PLASTIC, SO-8 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大小： | 107K |
| 代理商： | TS3V555ID |
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TS3V555
8/10
ASTABLE OPERATION
When the circuit is connected as shown in figure 4
(pin 2 and 6 connected) it triggers itself and free
runs as a multivibrator. The external capacitor
charges through RA and RB and discharges
through RB only. Thus the duty cycle may be pre-
cisely set by the ratio of these two resistors.
In the astable mode of operation, C charges and
discharges between 1/3 VCC and 2/3 VCC. As in
the triggered mode, the charge and discharge
times and therefore frequency, are independent of
the supply voltage.
Figure 4 :
Figure 5 shows actual waveforms generated in
this mode of operation.
The charge time (output HIGH) is given by :
t1 = 0.693 (RA + RB) C
and the discharge time (output LOW) by :
t2 = 0.693 (RB) C
Thus the total period T is given by :
T = t1 + t2 = 0.693 (RA + 2RB) C
The frequency of oscillation is then :
The duty cycle is given by :
Figure 5 :
VCC
Reset
Out
3
4
8
7
5
1
R
C
2
6
R
A
B
Control
Voltage
0.01 F
TS3V555
f =
1
T
--- =
1.44
(
RA
2
RB
)C
+
--------------------------------------
D =
RB
RA
2
RB
+
---------------------------
t = 0.5 ms / div
OUTPUT VOLTAGE = 5.0V/div
CAPACITOR VOLTAGE = 1.0V/div
L
R = R = 4.8 k , C = 0.1 F , R = 1.0k
AB
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS3V555IDT | 制造商:STMicroelectronics 功能描述:STD TIMER SGL 8SOIC - Tape and Reel |
| TS3V555IN | 功能描述:計時器和支持產(chǎn)品 Low Power Single RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| TS3V556 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3V LOW POWER DUAL TIMERS |
| TS3V556AID | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Timer Circuit |
| TS3V556AIN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Timer Circuit |
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