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參數(shù)資料
| 型號： | TS3V556 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3V LOW POWER DUAL TIMERS |
| 中文描述： | 3V的低功耗雙定時器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 63K |
| 代理商： | TS3V556 |
TS3V556
5/8
APPLICATION INFORMATION
MONOSTABLEOPERATION
In the monostable mode,the timer functions as a
one-shot. Referring to figure2 the external capaci-
tor is initially held discharged by a transistor inside
the timer.
V
C C
Reset
Trigger
Out
R
C
Control Voltage
0.01 F
1/2
TS3V556
Figure 2
CAPACITORVOLTAGE = 2.0V/div
R = 9.1k , C = 0.01 F , L
t = 0.1 ms / div
INPUT= 2.0V/div
OUTPUTVOLTAGE = 5.0V/div
Figure 3
TYPICAL CHARACTERISTICS
Figure 1 :
Supply Current (each timer)
versus supply voltage
.
CC
SUPPLYVOLTAGE, V
(V)
C
S
(
μ
300
200
100
0
4
8
12
16
The circuittriggerson anegative-going inputsignal
whenthelevel reaches1/3V
CC
. Oncetriggered,the
circuit remains in this state until the set time has
elapsed,even if it is triggered again during this in-
terval. The duration of the output HIGH state is
given by t = 1.1 R x C.
Notice that since the charge rate and the threshold
level of the comparator are both directly propor-
tional to supply voltage, the timing interval is inde-
pendent of supply. Applying a negative pulse
simultaneously to the Reset terminal (pin 4 or 10)
and theTrigger terminal (pin 2 or 8) during the tim-
ing cycle discharges the external capacitor and
causes thecycle tostartover.The timingcyclenow
starts on the positive edge of the reset pulse. Dur-
ing the timethe reset pulse is applied, the output is
driven to its LOW state.
When a negative triggerpulse is applied to thetrig-
ger terminal, the flip-flop is set, releasing the short
circuit acrosstheexternal capacitorand drivingthe
output HIGH. The voltage across the capacitor in-
creases exponentiallywiththetime constant
τ
=Rx
C.
When the voltage across the capacitor equals 2/3
V
CC
, the comparator resets the flip-flop which then
discharges thecapacitorrapidlyand drivesthe out-
put to its LOW state.
Figure 3 shows the actual waveforms generated in
this mode of operation.
When Reset is not used, it should be tied high to
avoid any possible or false triggering.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TS3V556I | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3V LOW POWER DUAL TIMERS |
| TS3V556ID | 功能描述:計時器和支持產(chǎn)品 USE 511-TS556ID 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 |
| TS3V556IDT | 制造商:STMicroelectronics 功能描述:STD TIMER DUAL 14SOIC - Tape and Reel |
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