- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373097 > KA555 (FAIRCHILD SEMICONDUCTOR CORP) single timer PDF資料下載
參數(shù)資料
| 型號： | KA555 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | single timer |
| 中文描述： | PULSE; RECTANGULAR, TIMER, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 148K |
| 代理商： | KA555 |
KA555
4
Application Information
Table1 below is the basic operating table of 555 timer:
When the low signal input is applied to the reset terminal, the timer output remains low regardless of the threshold voltage or
the trigger voltage. Only when the high signal is applied to the reset terminal, timer's output changes according to threshold
voltage and trigger voltage.
When the threshold voltage exceeds 2/3 of the supply voltage while the timer output is high, the timer's internal discharge Tr.
turns on, lowering the threshold voltage to below 1/3 of the supply voltage. During this time, the timer output is maintained
low. Later, if a low signal is applied to the trigger voltage so that it becomes 1/3 of the supply voltage, the timer's internal
discharge Tr. turns off, increasing the threshold voltage and driving the timer output again at high
.
1. Monos Table Operation
Table 1. Basic Operating Table
Threshold Voltage
(V
th
)(Pin6)
Don't care
V
th
> 2Vcc / 3
Vcc / 3 < V
th
< 2 Vcc / 3
V
th
< Vcc / 3
Trigger Voltage
(V
tr
)(Pin2)
Don't care
V
th
> 2Vcc / 3
Vcc / 3 < V
th
< 2 Vcc / 3
V
th
< Vcc / 3
Reset(Pin4)
Output(Pin3)
Discharging Tr.
(Pin7)
ON
ON
-
OFF
Low
High
High
High
Low
Low
-
High
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
-3
10
-2
10
-1
10
0
10
1
10
2
1M
1M
1k
10k
R
A
=k
C
Time Delay(s)
Figure 1. Monoatable Circuit
Figure 2. Resistance and Capacitance vs.
Time delay(t
d
)
Figure 3. Waveforms of Monostable Operation
1
5
6
7
8
4
2
3
RESET
Vcc
DISCH
THRES
CONT
GND
OUT
TRIG
+Vcc
R
A
C1
C2
R
L
Trigger
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KA558 | Tantalum Molded High Reliability Capacitor; Capacitance: 68uF; Voltage: 6.3V; Case Size: 7.3x4.3 mm; Packaging: Tape & Reel |
| KA558B | Tantalum Molded High Reliability Capacitor; Capacitance: 15uF; Voltage: 10V; Case Size: 6x3.2 mm; Packaging: Tape & Reel |
| KA558BD | Quad Timer |
| KA558D2 | Quad Timer |
| KA5H0165R | Fairchild Power Switch(FPS) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KA555 | 制造商:Fairchild Semiconductor Corporation 功能描述:IC TIMER 555 DIP8 |
| KA555_Q | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Single Timer RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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 |
| KA555D | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Single RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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 |
| KA555D | 制造商:Fairchild Semiconductor Corporation 功能描述:IC TIMER SMD SOIC8 555 |
| KA555DTF | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Single Timer RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。