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HD74HC4538P Datasheet(PDF) 4 Page - Renesas Technology Corp

Part # HD74HC4538P
Description  Dual Precision Retriggerable/Resettable Monostable Multivibrators
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD74HC4538P Datasheet(HTML) 4 Page - Renesas Technology Corp

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HD74HC4538
Rev.2.00 Mar 30, 2006 page 4 of 13
Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25
°C
Ta = –40 to +85
°C
Item
Symbol VCC (V)
Min
Typ
Max
Min
Max
Unit
Test Conditions
2.0
235
295
4.5
22
47
59
tPLH
6.0
40
50
ns
A or B to Q
2.0
260
325
4.5
23
52
65
tPHL
6.0
44
55
ns
A or B to
Q
2.0
235
295
4.5
17
47
59
tPHL
6.0
40
50
ns
CD to Q
2.0
235
295
4.5
47
59
Propagation delay
time
tPLH
6.0
40
50
ns
CD to Q
2.0
80
100
4.5
16
20
Pulse width
tw
6.0
14
17
ns
A, B, CD
3.0
150
5.0
100
ns
RX = 1 k
Ω, CX = 12 pF
3.0
5.0
1.3
µs RX = 10 kΩ, CX = 100 pF
3.0
5.0
9
µs RX = 10 kΩ, CX = 1000 pF
3.0
Output pulse width
tWQ
5.0
70
µs RX = 10 kΩ, CX = 10000 pF
Pulse width match
between circuits in
the same package
∆tWQ
5.0
±0.1
%
RX = 10 k
Ω, CX = 1000 pF
Caution in use: In order to prevent any malfunctions due to noise, connect a high frequency performance capacitor
between VCC and GND, and keep the wiring between the External components and Cext, Rext/Cext pins
as short as possible.
Test Circuit
VCC
C =
50 pF
VCC
L
Q
Rext/Cext
Cext
Clear
Q
Zout = 50
Zout = 50
Zout = 50
C =
50 pF
L
Rext
Cext
Note : 1. CL includes probe and jig capacitance.
Output
Input B
Pulse Generator
Output
Input A
Pulse Generator
Pulse Generator
Input Clear


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