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74HCT423DB bảng dữ liệu(PDF) 9 Page - NXP Semiconductors

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74HC_HCT423_3
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 03 — 24 July 2008
9 of 23
NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
REXT
external timing
resistor
VCC = 2.0 V; see Figure 8
10
-
1000
----
k
VCC = 5.0 V
2
-
1000
----
k
CEXT
external timing
capacitor
VCC = 5.0 V; see Figure 8
[5]
no limits
pF
CPD
power
dissipation
capacitance
per package; VI = GND to VCC
[6]
-
54
-
----
pF
74HCT423
tpd
propagation
delay
nA or nB to nQ or nQ; REXT =5kΩ;
CEXT = 0 pF; see Figure 7
VCC = 4.5 V
[1]
-
30
51
-
64
-
77
ns
VCC = 5.0 V; CL =15pF
[1]
-
26
-
----
ns
nRD to nQ or nQ; REXT =5kΩ;
CEXT = 0 pF; see Figure 7
[1]
-
26
48
-
60
-
72
ns
VCC = 4.5 V
[1]
-
26
48
-
60
-
72
ns
VCC = 5.0 V; CL =15pF
[1]
-
22
-
----
ns
tt
transition time
VCC = 4.5 V; Figure 7
[2]
-
7
15
-
19
-
22
ns
tW
pulse width
trigger pulse; nA input LOW; VCC = 4.5 V;
see Figure 7 and Figure 10
20
5
-
25
-
30
-
ns
trigger pulse; nB input HIGH; VCC = 4.5 V;
see Figure 7 and Figure 10
20
5
-
25
-
30
-
ns
reset pulse; nRD input LOW; VCC = 4.5 V;
see Figure 7 and Figure 11
20
7
-
25
-
30
-
ns
output pulse; nQ HIGH or nQ LOW;
VCC = 5.0 V; REXT =10kΩ;
CEXT = 100 nF; see Figure 7, Figure 10
and Figure 11
-
450
-
----
µs
output pulse; nQ HIGH or nQ LOW;
VCC = 5.0 V; REXT =5kΩ; CEXT = 0 pF;
VI = GND to VCC − 1.5 V; see Figure 7,
Figure 10 and Figure 11
[3]
-
75
-
----
ns
trtrig
retrigger time
nA or nB input; VCC = 5.0 V; REXT =5kΩ;
CEXT = 0 pF; see Figure 10
-
110
-
----
ns
REXT
external timing
resistor
VCC = 5.0 V; see Figure 8
2
-
1000
----
k
CEXT
external timing
capacitor
VCC = 5.0 V; see Figure 8
[5]
no limits
pF
Table 7.
Dynamic characteristics …continued
GND = 0 V; test circuit see Figure 12.
Symbol Parameter
Conditions
25
°C
−40 °Cto
+85
°C
−40 °Cto
+125
°C
Unit
Min
Typ
Max
Min Max Min Max


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