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參數(shù)資料
| 型號： | TS555ID |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 定時器 |
| 英文描述： | LOW POWER SINGLE CMOS TIMERS |
| 中文描述： | 低耗電的單一的CMOS定時器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 84K |
| 代理商： | TS555ID |
APPLICATION INFORMATION
MONOSTABLE OPERATION
In the monostable mode,the timer functions as a
one-shot. Referring to figure 2 the externalcapaci-
tor is initially held dischargedby atransistor inside
the timer.
V
CC
Reset
Trigger
Out
3
2
4
8
7
6
5
1
TS555
R
C
Control Voltage
0.01 F
Figure2
CC
SUPPLY VOLTAGE, V
(V)
C
S
(
μ
300
200
100
0
4
8
12
16
TYPICALCHARACTERISTICS
Figure 1 :
SupplyCurrent (each timer) versus
SupplyVoltage
Thecircuittriggers onanegative-goinginputsignal
whenthelevelreaches1/3V
CC
. Oncetriggered,the
circuit remains in this state until the set time has
elapsed,even if it is triggered again during this
interval. The duration of the output HIGH state is
given by t = 1.1 R x C.
Noticethat since thechargerate and thethreshold
level of the comparator are both directly propor-
tional to supplyvoltage, the timing interval is inde-
pendent of supply. Applying a negative pulse
simultaneouslytotheResetterminal(pin4)andthe
Trigger terminal (pin 2) during the timing cycle
discharges the external capacitor and causes the
cycle to startover. The timing cycle now startson
thepositiveedgeoftheresetpulse.Duringthetime
the reset pulseis applied,the output is driven toits
LOW state.
When a negative trigger pulse is applied to pin 2,
the flip-flop is set, releasingthe shortcircuit across
theexternalcapacitoranddrivingtheoutputHIGH.
The voltage across the capacitor increases expo-
nentiallywith the time constant
τ
= R x C.
When the voltageacross the capacitor equals 2/3
V
CC
, thecomparatorresets the flip-flopwhich then
discharges the capacitor rapidly and drives the
output to its LOWstate.
Figure 3 showsthe actualwaveforms generatedin
this mode of operation.
When Reset is not used, it should be tied high to
avoid any possible or false triggering.
CAPACITOR VOLTAGE = 2.0V/div
R = 9.1k , C= 0.01 F , RL
t = 0.1ms / div
INPUT = 2.0V/div
OUTPUT VOLTAGE = 5.0V/div
Figure 3
TS555C,I,M
8/12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS555IDT | 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 |
| TS555IDT-CUT TAPE | 制造商:ST 功能描述:TS555 Series 16 V 2.7 MHz Surface Mount Low Power Single CMOS Timer - SOIC-8 |
| TS555IDTTR | 功能描述:555 Type, Timer/Oscillator (Single) IC 2.7MHz 8-SOIC (0.154", 3.90mm Width) 制造商:stmicroelectronics 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:555 型，計時器/振蕩器（單路） 計數(shù):- 頻率:2.7MHz 電壓 - 電源:2 V ~ 16 V 電流 - 電源:65μA 工作溫度:-40°C ~ 125°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SO 安裝類型:表面貼裝 標(biāo)準(zhǔn)包裝:1 |
| TS555IJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Timer Circuit |
| TS555IN | 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 |
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