MC14538B
http://onsemi.com
6
Figure 4. Switching Test Waveforms
RESET
A
B
tPLH
Q
50%
tWH
90%
10%
tTLH
tTHL
tWL
tTHL
tPHL
tTHL
90%
10%
50%
T
50%
90%
10%
tPLH
tTHL
tTLH
tPHL
tWL
50%
90%
10%
tPHL
tTLH
tTHL
tPLH
50%
90%
10%
50%
trr
50%
VDD
tTLH
Figure 5. Typical Normalized Distribution
of Units for Output Pulse Width
Figure 6. Typical Pulse Width Variation as
a Function of Supply Voltage VDD
0
0.2
0.4
0.6
0.8
1.0
-4
-2
0
2
4
T, OUTPUT PULSE WIDTH (%)
RELA
TIVE
FREQUENCY
OF
OCCURRENCE
2
1
0
1
2
15
14
13
12
11
10
9
8
7
6
5
VDD, SUPPLY VOLTAGE (VOLTS)
NORMALIZED
PULSE
WIDTH
CHANGE
WITH
RESPECT
T
O
V
ALUE
A
T
V
DD
=
10
V
(%)
TA = 25°C
RX = 100 kW
CX = 0.1 mF
0% POINT PULSE WIDTH
VDD = 5.0 V, T = 9.8 ms
VDD = 10 V, T = 10 ms
VDD = 15 V, T = 10.2 ms
RX = 100 kW
CX = 0.1 mF
Figure 7. Typical Total Supply Current
versus Output Duty Cycle
T
O
TA
LSUPPL
Y
CURRENT
(
A
)
μ
1000
100
10
1.0
0.1
0.001
0.1
1.0
10
100
OUTPUT DUTY CYCLE (%)
RX = 100 kW, CL = 50 pF
ONE MONOSTABLE SWITCHING ONLY
VDD = 15 V
10 V
5.0 V
FUNCTION TABLE
Inputs
Outputs
Reset
A
B
Q
H
L
H
L
Not Triggered
H
Not Triggered
H
L, H,
H
Not Triggered
H
L
L, H,
Not Triggered
L
X
L
H
X
Not Triggered