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參數資料
| 型號： | PBRC-2.00AR |
| 英文描述： | RESONATOR SMD 2.00MHZ |
| 中文描述： | 諧振器貼片2.00MHZ |
| 文件頁數： | 29/50頁 |
| 文件大?。?/td> | 1431K |
| 代理商： | PBRC-2.00AR |
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28
Clock oscillators are devices which generate the pulses
to control the timing and operation of logic circuitry. They
differ from other components used to control the timing of
logic circuits, such as quartz crystals and ceramic resona-
tors, in that clock oscillators need a power supply but no
additional external circuitry to operate. Clock oscillators are
usually made by combining in a single package a frequency
control device such as a quartz crystal, and a hybrid circuit
of resistors, capacitors, and either transistors or an inte-
grated circuit. The package is often either a welded steel
can or ceramic package hermetically sealed which protects
the crystal and electronics from environmental effects and
also reduces the unwanted electromagnetic and radio-fre-
quency emissions which oscillators can generate.
OSCILLATION DEVICES
Various types of circuits can be used to generate tim-
ing waveforms for electronic devices. The simplest of these
is a simple circuit using capacitors, inductors and an active
element such as a transistor or operational amplifier. This
is an easy, low cost solution but the frequency is not very
stable due to temperature and individual component varia-
tions. A more stable circuit would utilize a ceramic resona-
tor, which has the advantage of better frequency tolerance,
but resonators are only available in certain frequency ranges
and stability of ±0.5% is the best that can be achieved. If
better frequency stability is needed, then the most popular
method is to use a circuit which relies on the piezoelectric
properties of quartz crystals to stabilize the oscillation.
If an alternating electrical field is applied to a cut and
polished quartz crystal, the crystal lattice will deform due
to what is is called the piezoelectric effect. At one particu-
lar frequency, which is determined by the geometry and
size of the crystal, vibration will occur much more easily
than at any other frequency. This is called the “resonant”
frequency. If an oscillation circuit is built around this crys-
tal, the mechanical vibrations can be used to control the
electrical oscillations very precisely.
AVX/Kyocera builds its high quality clock oscillators
from the substrate up. The whole module is hermetically
sealed into an all-metal welded package to protect it from
humidity. The case is directly grounded into a pin to help
minimize RF radiation and meet FCC’s EMI specifications.
A full range of clock oscillators are manufactured by
AVX/Kyocera. These extend from 1 MHz up to 72 MHz and
include TTL and HCMOS compatible drive levels. AVX/
Kyocera also offers special low power consumption clocks
for long life battery applications. (See chart page 28.) Ap-
plication specific designs for critical requirements of today’s
high-speed, 32-bit microprocessors are available.
WAVEFORM
The diagram below shows a typical waveform of a
clock oscillator with an explanation of the parameters im-
portant for correct selection of the appropriate device.
Often called the symmetry of a waveform, duty cycle is
a measure of how close to being equal the high and low
parts of a waveform are. A perfectly symmetrical waveform
will have duty cycle of 50%. We usually specify the mini-
mum and maximum variations of the duty cycle as, for
example: 60/40%. This is computed from the times shown
on the diagram below as A /A+B.
AVX/Kyocera Clock Oscillators
GENERAL DESCRIPTION
Cordless & Cellular Phones
Temperature Compensated
KT11
KT12
KT14
VCO
Output
Features
Frequency (MHz)
12.8, 13.0, 14.4, 14.85, 15.36, 16.8, 19.2
12.8, 13.0, 14.4, 16.8, 19.2, 19.68
13.0, 14.4, 14.85, 16.8, 19.2, 19.44, 19.68, 19.8
200~2000
1Vp-p/10k/10pF
1Vp-p/10k/10pF
1Vp-p/10k/10pF
Surface Mount
Miniature Surface Mount
Ultra Low Profile Surface Mount
High Performance Surface Mount
Series
Output
Fan Out
Output Level
V
OH
Min
Features
Frequency (MHz)
V
OL
Max
TTL
K50 -HC* -C
KXO -01
KXO -HC* -T (KHO -HC* -T)
HCMOS
K50 -HC* -C
K50 -CS* -SE
KXO -HC* -C (KHO -HC* -C)
386 -HC
Low Voltage
K50 -3C (3.3V)
Will also drive TTL. See catalog for details – page 31.
8 to 68
8 to 50
1 to 72
50pF
10 TTL
10 TTL
0.9 V
DD
2.4
2.4
0.1 V
DD
0.4
0.4
CMOS/TTL Drive
Cost Performance
Versatile Drive Capabilities
8 to 68
8 to 50
1 to 72
24,32,40,50
50pF
15pF
50 pF
7 TTL
0.9 V
DD
V
DD
-0.5
0.9 V
DD
0.9V
DD
0.1 V
DD
0.5
0.1 V
DD
0.1 V
DD
CMOS/TTL Drive
Low Power Consumption
Versatile Drive Capabilities
Drives 80386
8 to 68
15pF
0.9 V
DD
0.1 V
DD
Low Supply Voltage
相關PDF資料 |
PDF描述 |
|---|---|
| PBRC-2.00BR | RESONATOR SMD 2.00MHZ |
| PBRC-20.00BR | RESONATOR SMD 20.00MHZ |
| PBRC-3.58AR | RESONATOR SMD 3.58MHZ |
| PBRC-3.58BR | RESONATOR SMD 3.58MHZ |
| PBRC-4.00AR | RESONATOR SMD 4.00MHZ |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PBRC-3.00AR | 功能描述:諧振器 3.00MHZ RoHS:否 制造商:Murata 頻率:30 MHz 容差:25 PPM 系列:XRCGB 端接類型:SMD/SMT 工作溫度范圍:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封裝:Reel |
| PBRC-3.18BR | 功能描述:諧振器 3.18MHZ RoHS:否 制造商:Murata 頻率:30 MHz 容差:25 PPM 系列:XRCGB 端接類型:SMD/SMT 工作溫度范圍:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封裝:Reel |
| PBRC-3.20BR | 功能描述:諧振器 3.20MHZ RoHS:否 制造商:Murata 頻率:30 MHz 容差:25 PPM 系列:XRCGB 端接類型:SMD/SMT 工作溫度范圍:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封裝:Reel |
| PBRC-3.24AR | 功能描述:諧振器 3.24MHZ RoHS:否 制造商:Murata 頻率:30 MHz 容差:25 PPM 系列:XRCGB 端接類型:SMD/SMT 工作溫度范圍:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封裝:Reel |
| PBRC-3.38BR | 功能描述:諧振器 3.38MHZ RoHS:否 制造商:Murata 頻率:30 MHz 容差:25 PPM 系列:XRCGB 端接類型:SMD/SMT 工作溫度范圍:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封裝:Reel |
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