MC14536B
http://onsemi.com
7
Figure 2. RC Oscillator Stability Figure 3. RC Oscillator Frequency as a
Function of R
TC
and C
R
S
= 0, f = 10.15 kHz @ V
DD
= 10 V, T
A
= 25°C
R
S
= 120 kW, f = 7.8 kHz @ V
DD
= 10 V, T
A
= 25°C
R
TC
= 56 kW,
C = 1000 pF
V
DD
= 15 V
10 V
5.0 V
8.0
4.0
0
-4.0
-8.0
-12
-16
-55 -25 0 25 50 75 100 125
T
A
, AMBIENT TEMPERATURE (°C)*
*Device Only.
FREQUENCY DEVIATION (%)
TYPICAL RC OSCILLATOR CHARACTERISTICS
(For Circuit Diagram See Figure 12 In Application)
100
0.1
0.2
0.5
1.0
2.0
5.0
10
20
50
1.0 k 10 k 100 k 1.0 M
0.0001 0.001 0.01 0.1
R
TC
, RESISTANCE (W)
C, CAPACITANCE (mF)
f, OSCILLATOR FREQUENCY (kHz)
f AS A FUNCTION
OF C
(R
TC
= 56 kW)
(R
S
= 120 k)
f AS A FUNCTION
OF R
TC
(C = 1000 pF)
(R
S
≈ 2R
TC
)
V
DD
= 10 V
Figure 4. Typical C
X
versus Pulse Width
@ V
DD
= 5.0 V
Figure 5. Typical C
X
versus Pulse Width
@ V
DD
= 10 V
100
0.1
1.0
10
1000100101.0
C
X
, EXTERNAL CAPACITANCE (pF)
, PULSE WIDTH (t
W
μs)
R
X
= 100 kW
50 kW
10 kW
5 kW
T
A
= 25°C
V
DD
= 5 V
FORMULA FOR CALCULATING t
W
IN
MICROSECONDS IS AS FOLLOWS:
t
W
= 0.00247 • R
X
• (C
X
)
0.85
WHERE R IS IN kW, C
X
IN pF.
1000100101.0
C
X
, EXTERNAL CAPACITANCE (pF)
100
0.1
1.0
10
, PULSE WIDTH (t
W
μs)
FORMULA FOR CALCULATING t
W
IN
MICROSECONDS IS AS FOLLOWS:
t
W
= 0.00247 • R
X
• (C
X
)
0.85
WHERE R IS IN kW, C
X
IN pF.
R
X
= 100 kW
50 kW
10 kW
5 kW
T
A
= 25°C
V
DD
= 10 V
Figure 6. Typical C
X
versus Pulse Width
@ V
= 15 V
1000100101.0
C
X
, EXTERNAL CAPACITANCE (pF)
100
0.1
1.0
10
, PULSE WIDTH (t
W
μs)
FORMULA FOR CALCULATING t
W
IN
MICROSECONDS IS AS FOLLOWS:
t
W
= 0.00247 • R
X
• (C
X
)
0.85
WHERE R IS IN kW, C
X
IN pF.
R
X
= 100 kW
50 kW
10 kW
5 kW
T
A
= 25°C
V
DD
= 15 V
MONOSTABLE CHARACTERISTICS
(For Circuit Diagram See Figure 11 In Application)
