參數(shù)資料
型號(hào): SAA5281GP
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 圖文
英文描述: RES 11.3K OHM 1/16W .5% 0603 SMD
中文描述: TELETEXT AND VPS/PDC DECODER, PQFP64
封裝: 14 X 20 MM, 2.80 MM HEIGHT, PLASTIC, SOT-319-2, QFP-64
文件頁(yè)數(shù): 26/48頁(yè)
文件大小: 1187K
代理商: SAA5281GP
1996 Nov 04
26
Philips Semiconductors
Preliminary specification
Integrated Video input processor and
Teletext decoder (IVT1.8*)
SAA5281
CLOCK SYSTEMS
Crystal oscillator
The crystal is a conventional Colpitts 3-pin design
operating at 27 MHz. The oscillator is sinusoidal and
linear, with a controlled output amplitude. This reduces the
radiated and conducted level of the 27 MHz fundamental
frequency, and reduces the power dissipation in the quartz
crystal. It is capable of oscillating with both fundamental
and third overtone mode crystals. External components
should be used to suppress the fundamental output of the
third overtone as illustrated in Fig.13. The crystal
characteristics are given in Table 13.
Table 13
Crystal characteristics (see Fig.13)
SYMBOL
PARAMETER
TYP.
MAX.
UNIT
Crystal (27 MHz, 3rd overtone)
C1
C0
C
L
R
r
R1
X
a
X
j
X
d
series capacitance
parallel capacitance
load capacitance
resonance resistance
series resistance
ageing
adjustment tolerance
drift
1.7
5.2
20
20
50
±
5
×
10
6
±
25
×
10
6
±
25
×
10
6
pF
pF
pF
year
1
Fig.13 Crystal oscillator application diagram for SOT240-1; pins in parenthesis are for SOT247-1.
handbook, full pagewidth
3
2
SAA5281
MBD786
4
1
8.2 pF
CRYSTAL
OSCILLATOR
100 nF
15 pF
1 nF
3.3
μ
H
3.3 k
(52)
(1)
(2)
(3)
OSCGND
OSCIN
OSCOUT
VDD1
27 MHz
3rd
overtone
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