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CD54HCT4538 Datasheet(PDF) 3 Page - Texas Instruments

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Part No. CD54HCT4538
Description  High-Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrator
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54HCT4538 Datasheet(HTML) 3 Page - Texas Instruments

 
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FIGURE 2. LOGIC DIAGRAM (1 MONO)
FUNCTIONAL TERMINAL CONNECTIONS
FUNCTION
VCC TO
TERMINAL NUMBER
GND TO
TERMINAL NUMBER
INPUT PULSE TO
TERMINAL NUMBER
OTHER
CONNECTIONS
MONO1
MONO2
MONO1
MONO2
MONO1
MONO2
MONO1
MONO2
Leading-Edge
Trigger/Retriggerable
3, 5
11, 13
4
12
Leading-Edge
Trigger/Non-Retriggerable
3
13
4
12
5-7
11-9
Trailing-Edge
Trigger/Retriggerable
313412
511
Trailing-Edge
Trigger/Non-Retriggerable
3
13
5
11
4-6
12-10
NOTES:
1. A retriggerable one-shot multivibrator has an output pulse width which is extended one full time period (T) after application of the last
trigger pulse.
2. A non-triggerable one-shot multivibrator has a time period (T) referenced from the application of the first trigger pulse.
FIGURE 3. INPUT PULSE TRAIN
FIGURE 4. RETRIGGERABLE MODE
PULSE WIDTH (A MODE)
FIGURE 5. NON-RETRIGGERABLE MODE
PULSE WIDTH
(A MODE)
D
CL
CL
Q
Q
R2
R1
FF
VCC
VCC
RX
CX
2(14)
1(15)
8
R
A
B
3(13)
4(12)
5(11)
VCC
VCC
HIGH Z
VCC
VCC
R1
R2
COMP II
-
+
6(10)
7(9)
Q
Q
VCC
16
T
T
CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538


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