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74HCU04 Datasheet(PDF) 7 Page - NXP Semiconductors

No. de pieza 74HCU04
Descripción Electrónicos  Hex inverter
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCU04 Datasheet(HTML) 7 Page - NXP Semiconductors

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September 1993
7
Philips Semiconductors
Product specification
Hex inverter
74HCU04
OPTIMUM VALUE FOR R2
EXTERNAL COMPONENTS FOR RESONATOR
(f
< 1 MHz)
Note
1. All values given are typical and must be used as an
initial set-up.
FREQUENCY
(MHz)
R2
(k
Ω)
OPTIMUM FOR
3
2
8
minimum required ICC
minimum influence due to
change in VCC
6
1
4.7
minimum ICC
minimum influence by VCC
10
0.5
2
minimum ICC
minimum influence by VCC
14
0.5
1
minimum ICC
minimum influence by VCC
> 14
replace R2 by C3 with a typical
value of 35 pF
FREQUENCY
(kHz)
R1
(M
Ω)
R2
(k
Ω)
C1
(pF)
C2
(pF)
10 to 15.9
22
220
56
20
16 to 24.9
22
220
56
10
25 to 54.9
22
100
56
10
55 to 129.9
22
100
47
5
130 to 199.9
22
47
47
5
200 to 349.9
10
47
47
5
350 to 600
10
47
47
5
Fig.13 Crystal oscillator configuration.
C1 = 47 pF (typ.)
C2 = 33 pF (typ.)
R1 = 1 to 10 MΩ (typ.)
R2 optimum value depends on the frequency and required
stability against changes in VCC or average minimum ICC
(ICC is typically 5 mA at VCC = 5 V and f = 10 MHz).
Note to Application information
All values given are typical unless otherwise specified.
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”.
Fig.14 HCU04 used as an astable multivibrator
RS ≈ 2 × R.
The average ICC (mA) is approximately
3.5 + 0.05
× f (MHz) × C (pF) at VCC = 5.0 V
(for more information refer to
“DESIGNERS GUIDE”).
f
1
T
---
1
2.2 RC
------------------
=
Fig.15 Typical input capacitance as a function of
input voltage.
(1) VCC = 2.0 V.
(2) VCC = 3.0 V.
(3) VCC = 4.0 V.
(4) VCC = 5.0 V.
(5) VCC = 6.0 V.


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