74HC4538 查看數據表（PDF） - Nexperia B.V. All rights reserved
零件编号
产品描述 (功能)
生产厂家
74HC4538 Datasheet PDF : 21 Pages
| |||
Nexperia
74HC4538
Dual retriggerable precision monostable multivibrator
Symbol Parameter Conditions
25 °C
trec
trtrig
REXT
CEXT
CPD
Min Typ[1] Max
VCC = 4.5 V
16
7
-
VCC = 6.0 V
14
6
-
nQ and nQ HIGH or LOW;
see Figure 8
VCC = 5.0 V;
CEXT = 0.1 μF;
REXT = 10 kΩ
recovery time nCD to nA, nB;
see Figure 8
630 700 770
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
35
6
-
7
2
-
6
2
-
retrigger time
nA, nB; see Figure 8;
X = CEXT / (4.5 × VCC)
VCC = 2.0 V
- 455+X -
external
timing
resistor
VCC = 4.5 V
VCC = 6.0 V
VCC = 2.0 V
VCC = 5.0 V
- 80+X -
- 55+X -
10
- 1000
2
- 1000
external
timing
capacitor
power
dissipation
capacitance
per multivibrator;
VI = GND to VCC
[3] -
136
-
-40 °C to
+85 °C
Min Max
20
-
17
-
602 798
45
-
9
-
8
-
-
-
-
-
-
-
-
-
-
-
no limits
-
-
[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD × VCC2 × fi + Σ(CL × VCC2 × fo) + 0.48 × CEXT × VCC2 × fo + D × 0.8 × VCC where:
fi = input frequency in MHz;
fo = output frequency in MHz;
Σ(CL × VCC2 × fo) = sum of the outputs;
CL = output load capacitance in pF;
VCC = supply voltage in V;
D = duty cycle factor in %;
CEXT = external timing capacitance in pF.
-40 °C to
+125 °C
Min Max
24
-
20
-
Unit
ns
ns
595 805 μs
55
- ns
11
- ns
9
- ns
-
- ns
-
- ns
-
- ns
-
- kΩ
-
- kΩ
-
- pF
74HC4538
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 17 March 2017
© Nexperia B.V. 2017. All rights reserved.
9 / 21
Share Link: 