CA555, CA555C, LM555C
t
2
t
100
10
1
o
T
= 25 C, V+ = 5V
A
5V
R
+ 2R = 1kΩ
1
2
10kΩ
1
0
100kΩ
1MΩ
10MΩ
0.1
3.3V
0.01
1.7V
0
0.001
-1
2
3
4
5
10
1
10
10
10
10
10
FREQUENCY (Hz)
Top Trace: Output voltage (2V/Div. and 0.5ms/Div.)
Bottom Trace: Capacitor voltage (1V/Div. and 0.5ms/Div.)
FIGURE 6. FREE RUNNING FREQUENCY OF REPEAT CYCLE
TIMER WITH VARIATION IN CAPACITANCE AND
RESISTANCE
FIGURE 5. TYPICAL WAVEFORMS FOR REPEAT CYCLE TIMER
Typical Performance Curves
150
10
9
8
7
6
5
4
3
2
1
o
T
= 125 C
A
o
T
= -55 C
A
o
100
50
25 C
o
0 C
o
50 C
o
25 C
o
70 C
o
125 C
0
0.1
0.2
0.3
0.4
0
2.5
5
7.5
10
12.5
15
MINIMUM TRIGGER (PULSE) VOLTAGE (x V+) (NOTE)
SUPPLY VOLTAGE (V)
NOTE: Where x is the decimal multiplier of the supply voltage.
FIGURE 8. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 7. MINIMUM PULSE WIDTH vs MINIMUM TRIGGER
VOLTAGE
2.0
10.0
V+ = 5V
o
T
= -55 C
A
o
1.6
1.2
0.8
0.4
0
T
= -55 C
A
o
25 C
o
25 C
1.0
0.1
o
125 C
o
125 C
5V ≤ V+ ≤ 15V
0.01
1
10
SINK CURRENT (mA)
100
1
10
SOURCE CURRENT (mA)
100
FIGURE 9. OUTPUT VOLTAGE DROP (HIGH STATE) vs
SOURCE CURRENT
FIGURE 10. OUTPUT VOLTAGE LOW STATE vs SINK
CURRENT
5
INTERSIL [ Intersil ]
