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MC14538B Datasheet(PDF) 4 Page - Motorola, Inc

Part No. MC14538B
Description  DUAL PRECISION RETRIGGERABLE / RESETTABLE MONOSTABLE MULTIVIBRATOR
Download  10 Pages
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC14538B Datasheet(HTML) 4 Page - Motorola, Inc

 
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MOTOROLA CMOS LOGIC DATA
MC14538B
4
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
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 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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