74HCT4538N 查看數據表（PDF） - NXP Semiconductors.
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74HCT4538N Datasheet PDF : 24 Pages
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NXP Semiconductors
74HC4538; 74HCT4538
Dual retriggerable precision monostable multivibrator
Table 7. Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter Conditions
25 °C
−40 °C to
+85 °C
Min Typ[1] Max Min Max
tW
pulse width nA LOW; see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
nB HIGH; see Figure 8
80
17
16
6
14
5
-
100
-
-
20
-
-
17
-
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
nCD LOW; see Figure 8
80
17
16
6
14
5
-
100
-
-
20
-
-
17
-
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
nQ and nQ HIGH or LOW;
see Figure 8
80
19
16
7
14
6
-
100
-
-
20
-
-
17
-
VCC = 5.0 V;
CEXT = 0.1 µF;
REXT = 10 kΩ
trec
recovery time nCD to nA, nB;
see Figure 8
630 700 770 602 798
trtrig
REXT
CEXT
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
retrigger time nA, nB; see Figure 8;
X = CEXT / (4.5 × VCC)
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
external timing
resistor
VCC = 2.0 V
VCC = 5.0 V
external timing
capacitor
35
6
7
2
6
2
-
45
-
-
9
-
-
8
-
- 455 + X -
-
-
- 80 + X -
-
-
- 55 + X -
-
-
10
-
1000 -
-
2
-
1000 -
-
no limits
CPD
power
per multivibrator;
dissipation
VI = GND to VCC
capacitance
[3]
-
136
-
-
-
−40 °C to Unit
+125 °C
Min Max
120
- ns
24
- ns
20
- ns
120
- ns
24
- ns
20
- ns
120
- ns
24
- ns
20
- ns
595 805 µs
55
- ns
11
- ns
9
- ns
-
- ns
-
- ns
-
- ns
-
- kΩ
-
- kΩ
-
- pF
74HC_HCT4538_3
Product data sheet
Rev. 03 — 8 June 2009
© NXP B.V. 2009. All rights reserved.
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