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LM555C PDF预览

LM555C

更新时间: 2024-01-26 17:22:13
品牌 Logo 应用领域
哈里斯 - HARRIS 振荡器军事
页数 文件大小 规格书
6页 83K
描述
Timers for Timing Delays and Oscillator Application in Commercial, Industrial and Military Equipment

LM555C 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.13
Is Samacsys:N模拟集成电路 - 其他类型:PULSE; RECTANGULAR
JESD-30 代码:R-PDIP-T8JESD-609代码:e0
功能数量:1端子数量:8
最高工作温度:125 °C最低工作温度:-55 °C
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP8,.3封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
电源:5/15 V认证状态:Not Qualified
子类别:Analog Waveform Generation Functions最大供电电流 (Isup):12 mA
最大供电电压 (Vsup):18 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):15 V表面贴装:NO
技术:BIPOLAR温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:THROUGH-HOLE
端子节距:2.54 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIEDBase Number Matches:1

LM555C 数据手册

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CA555, CA555C, LM555, LM555C, NE555  
V+  
100  
RESET  
5V  
o
T
= 25 C  
A
R
680  
V+ = 5V  
1
4
10  
1
7
6
8
5
EO  
R
= 1k  
1
3
CA555  
1N4001  
10kΩ  
100kΩ  
1
2
10K  
680  
1MΩ  
0.1  
10MΩ  
RELAY  
COIL  
C
4.7K  
T
0.01µF  
0.01  
0.001  
S
1
START  
-5  
10  
-4  
10  
-3  
10  
-2  
-1  
10  
10  
1
10  
TIME DELAY(s)  
NOTE: All resistance values are in ohms.  
FIGURE 3. TIME DELAY vs RESISTANCE AND CAPACITANCE  
Repeat Cycle Timer (Astable Operation)  
FIGURE 1. RESET TIMER (MONOSTABLE OPERATION)  
Since the charge rate and threshold level of the comparator  
are both directly proportional to V+, the timing interval is rel-  
atively independent of supply voltage variations. Typically,  
the timing varies only 0.05% for a 1V change in V+.  
Figure 4 shows the CA555 connected as a repeat cycle  
timer. In this mode of operation, the total period is a function  
of both R and R  
1
R
R
2.  
Applying a negative pulse simultaneously to the reset termi-  
nal (4) and the trigger terminal (2) during the timing cycle  
V+  
5V  
discharges C and causes the timing cycle to restart.  
T
1
2
4
Momentarily closing only the reset switch during the timing  
interval discharges C , but the timing cycle does not restart.  
T
7
8
5
EO  
Figure 2 shows the typical waveforms generated during this  
mode of operation, and Figure 3 gives the family of time  
3
CA555  
6
RELAY  
COIL  
delay curves with variations in R and C .  
1
T
1
2
SWITCH S “OPEN”  
1
3V  
INPUT  
VOLTAGE (TERMINAL 2)  
C
0.01µF  
T
SWITCH S “CLOSED”  
1
0
3.3V  
CAPACITOR  
FIGURE 4. REPEAT CYCLE TIMER (ASTABLE OPERATION)  
VOLTAGE (TERMINALS 6, 7)  
0
T = 0.693 (R + 2R ) C = t + t  
2
1
2
T
1
t
D
where t = 0.693 (R + R ) C  
T
1
1
2
5V  
and t = 0.693 (R ) C  
2
2
T
OUTPUT  
VOLTAGE  
the duty cycle is:  
(TERMINAL 3)  
t
R + R  
1 2  
R + 2R  
1 2  
0
1
--------------- ------------------------  
=
t
+ t  
1
2
FIGURE 2. TYPICAL WAVEFORMS FOR RESET TIMER  
Typical waveforms generated during this mode of operation  
are shown in Figure 5. Figure 6 gives the family of curves of  
free running frequency with variations in the value of  
(R + 2R ) and C .  
1
2
T
8-6  

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