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MC14538B Datasheet(PDF) 5 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) 5 Page - ON Semiconductor

 
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MC14538B
http://onsemi.com
5
OPERATING CONDITIONS
External Timing Resistance
RX
5.0
(8.)
k
External Timing Capacitance
CX
0
No
Limit (9.)
µF
8. The maximum usable resistance RX is a function of the leakage of the capacitor CX, leakage of the MC14538B, and leakage due to board
layout and surface resistance. Susceptibility to externally induced noise signals may occur for RX > 1 MΩ..
9. If CX > 15 µF, use discharge protection diode per Fig. 11.
Figure 1. Logic Diagram
(1/2 of DevIce Shown)
NOTE: Pins 1, 8 and 15 must
be externally grounded
+
+
VDD
VDD
P1
RX
CX
2
1
(14)
(15)
4 (12)
5(11)
3 (13)
A
B
RESET
VSS
N1
Vref1
C1
C2
ENABLE
Vref2
ENABLE
CONTROL
S
RESET LATCH
QR
QR
R
S
R
S
Q
Q
6 (10)
7 (9)
OUTPUT
LATCH
Figure 2. Power Dissipation Test Circuit and Waveforms
500 pF
VDD
0.1
µF
CERAMIC
RX
RX
CX
VSS
CX
VSS
Vin
CX/RX
A
B
RESET
A
B
RESET
Q
Q
Q
Q
VSS
CL
CL
CL
CL
20 ns
20 ns
VDD
0 V
90%
10%
Vin
ID


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