74HCT423N(2011) 查看數據表（PDF） - NXP Semiconductors.
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74HCT423N Datasheet PDF : 24 Pages
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NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
Table 7. Dynamic characteristics …continued
GND = 0 V; test circuit see Figure 12.
Symbol Parameter Conditions
25 C
40 C to 40 C to Unit
+85 C +125 C
Min Typ Max Min Max Min Max
REXT
CEXT
external timing VCC = 2.0 V; see Figure 8
resistor
VCC = 5.0 V
external timing VCC = 5.0 V; see Figure 8
capacitor
10 - 1000 - - - - k
2 - 1000 - - - - k
[5]
no limits
pF
CPD
power
per package; VI = GND to VCC
dissipation
capacitance
[6] -
54
-
-
-
-
- pF
74HCT423
tpd
propagation nA or nB to nQ or nQ; REXT = 5 k;
delay
CEXT = 0 pF; see Figure 7
VCC = 4.5 V
[1] - 30 51 - 64 - 77 ns
VCC = 5.0 V; CL = 15 pF
[1] -
26
-
-
-
-
- ns
nRD to nQ or nQ; REXT = 5 k;
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 = 15 pF
[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;
20 5 - 25 - 30 - ns
see Figure 7 and Figure 10
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 = 10 k; CEXT = 100 nF;
see Figure 7, Figure 10 and Figure 11
- 450 - - - - - s
output pulse; nQ HIGH or nQ LOW;
[3] -
75
-
-
-
-
- ns
VCC = 5.0 V; REXT = 5 k; CEXT = 0 pF;
VI = GND to VCC 1.5 V; see Figure 7,
Figure 10 and Figure 11
trtrig
REXT
retrigger time nA or nB input; VCC = 5.0 V; REXT = 5 k;
CEXT = 0 pF; see Figure 10
external timing VCC = 5.0 V; see Figure 8
resistor
- 110 - - - - - ns
2 - 1000 - - - - k
CEXT external timing VCC = 5.0 V; see Figure 8
[5]
no limits
pF
capacitor
74HC_HCT423
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 19 December 2011
© NXP B.V. 2011. All rights reserved.
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