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MC14538B Datasheet(PDF) 6 Page - ON Semiconductor

Part No. MC14538B
Description  Dual Precision Retiggerable/Resettable Monostable Multivibrator
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC14538B Datasheet(HTML) 6 Page - ON Semiconductor

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MC14538B
http://onsemi.com
6
INPUT CONNECTIONS
Characteristics
Reset
A
B
tPLH, tPHL, tTLH, tTHL,
T, tWH, tWL
VDD
PG1
VDD
tPLH, tPHL, tTLH, tTHL,
T, tWH, tWL
VDD
VSS
PG2
tPLH(R), tPHL(R),
tWH, tWL
PG3
PG1
PG2
Figure 4. Switching Test Waveforms
RESET
A
B
tPLH
Q
Q
50%
tWH
90%
10%
tTLH
tTHL
tWL
tTHL
tPHL
tTHL
90%
10%
50%
T
50%
50%
50%
90%
10%
tPLH
tTHL
tTLH
tPHL
tWL
50%
90%
10%
tPHL
tPHL
tTLH
tTHL
tPLH
50%
50%
90%
10%
50%
50%
50%
trr
50%
VDD
VDD
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 (%)
2
1
0
1
2
15
14
13
12
11
10
9
8
7
6
5
VDD, SUPPLY VOLTAGE (VOLTS)
TA = 25°C
RX = 100 kΩ
CX = 0.1 µF
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 kΩ
CX = 0.1 µF
Figure 3. Switching Test Circuit
* Includes capacitance of probes,
wiring, and fixture parasitic.
NOTE: Switching test waveforms
for PG1, PG2, PG3 are shown
In Figure 4.
VDD
RX
RX
VSS
CX
CX/RX
A
B
RESET
A
B
RESET
Q
Q
Q
Q
CL
CX
CL
CL
CL
VSS
PULSE
GENERATOR
PULSE
GENERATOR
PULSE
GENERATOR
VSS
*CL = 50 pF
PG1 =
PG2 =
PG3 =


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