參數(shù)資料
型號(hào): 74LVU04PWDH
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: CERAMIC CHIP/MIL-PRF-55681
中文描述: LV/LV-A/LVX/H SERIES, HEX 1-INPUT INVERT GATE, PDSO14
封裝: PLASTIC, SOT-402-1, TSSOP1-14
文件頁(yè)數(shù): 7/14頁(yè)
文件大小: 127K
代理商: 74LVU04PWDH
Philips Semiconductors
Product specification
74LVU04
Hex inverter
1998 Apr 20
7
APPLICATION INFORMATION
Some applications for the 74LVU04 are:
Linear amplifier (see Figure 7)
In crystal oscillator designs (see Figure 8)
Astable multivibrator (see Figure 9)
SV00404
VCC
R
2
R
1
1 F
Z
L
GND
U04
Note:
Z
L
> 10k
; A
OL
= 20 (typical)
Au
AOL
1
R1
R2
(1
AOL)
;VOMax(P
V
CC
– 1.5 V centered
at
1
/
2
V
CC
P)
3 k
< R1, R2 < 1 M
Typical unity gain bandwidth product is 5 MHz.
C
l
, see Figure10
A
OL
= open loop amplification
A
u
= voltage amplification
Figure 7. LVU04 used as a linear amplifier.
EXTERNAL COMPONENTS FOR RESONATOR
(f < 1 mHz)
FREQUENCY
(kHz)
R
1
(M )
R
2
(K )
C
1
(pF)
C
2
(pF)
10 .. 15.9
2.2
220
56
20
16 .. 24.9
2.2
220
56
10
25 .. 54.9
2.2
100
56
10
55 .. 129.9
2.2
100
47
5
130 .. 199.9
2.2
47
47
5
200 .. 349.9
2.2
47
47
5
350 .. 600
WHERE:
All values given are typical and must be used as an initial set-up.
2.2
47
47
5
SV00408
U04
R2
C2
C1
R1
out
Note:
C
1
= 47 pF (typ.)
C
2
= 22 pF (typ.)
R
1
= 1 to 10 M (typ.)
R
optimum value depends on the frequency and required stability against
changes in V
or average minimum I
CC
(I
CC
is typically
2 mA at V
CC
= 3 V and f = 1 MHz).
Figure 8. Crystal oscillator configuration.
OPTIMUM VALUE FOR R
2
FREQUENCY
(MHz)
R
(k )
Optimum
3
2.0
8.0
Minimum required I
CC
Minimum influence due to change in V
CC
6
1.0
4.7
Minimum I
CC
Minimum influence by V
CC
10
0.5
2.0
Minimum I
CC
Minimum influence by V
CC
14
0.5
1.0
Minimum I
CC
Minimum influence by V
CC
> 14
Replace R
2
by C
3
with a typical value of 35 pF
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