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PX-721-ECE-SCBA-698M812330

LVPECL Output Clock Oscillator, 698.81233MHz Nom, ROHS COMPLIANT, HERMETIC SEALED PACKAGE-6

器件类别：无源元件    振荡器   

厂商名称：Vectron International, Inc.

厂商官网：http://www.vectron.com/

器件标准：  

下载文档
参数 预览
器件参数
参数名称
属性值
是否无铅
不含铅
是否Rohs认证
符合
Objectid
1263121922
包装说明
ROHS COMPLIANT, HERMETIC SEALED PACKAGE-6
Reach Compliance Code
compliant
其他特性
ENABLE/DISABLE FUNCTION; COMPLEMENTARY OUTPUT; TR, 7 INCH
最长下降时间
0.35 ns
频率调整-机械
NO
频率稳定性
100%
JESD-609代码
e4
安装特点
SURFACE MOUNT
标称工作频率
698.81233 MHz
最高工作温度
85 °C
最低工作温度
-40 °C
振荡器类型
LVPECL
物理尺寸
7.0mm x 5.0mm x 1.62mm
最长上升时间
0.35 ns
最大供电电压
3.63 V
最小供电电压
2.97 V
标称供电电压
3.3 V
表面贴装
YES
最大对称度
55/45 %
端子面层
Gold (Au) - with Nickel (Ni) barrier
文档预览
Single Frequency HPLL XO
PX-721
PX-721
Features
Description
Applications
The PX-721 is a crystal oscillator, XO, based upon Vectron’s HPLL high performance phase locked loop frequency multiplier ASIC, that combines
key digital synthesis techniques with VI’s proven core analog technology blocks. A standard low frequency crystal provides the reference to
the fractional-n synthesizer so that virtually any frequency between 10MHz and 1200 MHz can be factory programmed allowing quick turn
manufacturing.
Features
• Industry Standard Package, 5.0 x 7.0 x 1.8 mm
• HPLL High Performance PLL ASIC
• Typical Jitter 500 fs-rms (12 kHz to 20 MHz)
• Output Frequencies from 10 MHz to 1200 MHz
• Spurious Suppression, 70 dBc Typical
• 2.5V or 3.3V Supply Voltage
• LVCMOS, LVPECL or LVDS Output Configurations
• Output Enable
• Compliant to EC RoHS Directive
Applications
PLL circuits for clock smoothing and frequency translation
Description
Standard
• 1-2-4 Gigabit Fibre Channel
• 10 Gigabit Fibre Channel
• 10GbE LAN / WAN
• Synchronous Ethernet
• OC-192
• SONET / SDH
INCITS 352-2002
INCITS 364-2003
IEEE 802.3ae
ITU-T G.8262
ITU-T G.709
GR-253-CORE Issue4
Block Diagram
V
DD
COutput
Output
XTAL
LVCMOS
LVPECL
LVDS
HPLL
OE or NC
OE or NC
Gnd
Figure 1 - Block Diagram
Page 1 of 9
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Rev8: Feb 2014
PX-721 Single Frequency HPLL XO
Performance Specifications
Electrical Performance
Symbol
Supply
V
DD
I
DD
T
OP
Min
2.97
2.25
-
-
-
-40
0.75 x V
DD
-
Parameter
Voltage
1
Current
Test Conditions
3.3V Option
2.5V Option
LVCMOS
LVPECL
Typ
3.3
2.5
90
99
120
-
-
-
-
-
±20
Max
3.63
2.75
98
108
130
+85
-
0.5
1200
160
-
V
DD
-1.25
1.9
1.8
600
V
DD
0.1 x V
DD
350
1.2
55
-
1000
-
Units
V
LVDS
mA
°C
V
Operating Temperature
1, 3
Output Enable (OE)
V
IH
V
IL
Frequency
Nominal Frequency
1
Temperature Stability
1, 6
LVPECL Output
LVDS Output
LVCMOS Output
LVPECL/LVDS
LVCMOS
T
A
= -40 to +85°C
mid-level
swing (diff )
mid-level
swing (diff )
f
N
f
STAB
Outputs
V
O
V
OD
V
O
V
OD
V
OH
V
OL
10
10
-
V
DD
-1.42
1.1
1.4
300
0.9 x V
DD
-
-
-
45
65
MHz
ppm
V
V
PP
V
mV
PP
V
V
ps
ns
%
dBc
fs-rms
fs-rms
-
-
1.6
450
-
-
-
-
50
70
-
500
Rise/Fall Time (20/80%)
2,5
Symmetry
2,3
LVPECL/LVDS
LVCMOS with C
L
= 15 pF
LVPECL: V
DD
-1.3 V (diff )
LVDS: 1.6 V (diff )
LVCMOS: V
DD
/2
12 kHz to 20 MHz
12 kHz to 20 MHz
t
R/
t
f
SYM
Spurious Suppression
6
Jitter
6
(Performance Option N)
Jitter
6
(Performance Option A)
1]
2]
3]
4]
5]
6]
фJ
фJ
-
-
See Standard Frequencies and Ordering Information (Pg 8).
Parameters are tested with production test circuit (See Figure 2 for LVCMOS, Figure 3 for LVPECL and Figure 4 for LVDS).
Parameters are tested at ambient temperature with test limits guard-banded for specified operating temperature.
Measured as the maximum deviation from the best straight-line fit, per MIL-0-55310.
Parameters are described with waveform diagram below (Figure 5).
Not tested in production, guaranteed by design, verified at qualification.
Page 2 of 9
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Rev8: Feb 2014
PX-721 Single Frequency HPLL XO
Test Circuits & Output Waveform
+3.3V
OE or NC
10nF
1nF
OE or NC
+3.3V
10nF
1nF
1
6
1
6
OE or NC
2
5
NC
39
10nF
Scope
OE or NC
2
5
10nF
Scope
3
4
3
4
200
200
10k
10k
10nF
10k
10nF
VMD
VMD
10nF
Figure 2 - LVCMOS Production Test Circuit
Figure 3 - LVPECL Production Test Circuit
+3.3V
OE or NC
10nF
1nF
t
R
10nF
Scope
t
F
1
6
OE or NC
2
5
80
%
3
4
10k
10k
10nF
Vs
20
%
On Time
10nF
VMD
Period
Figure 4 - LVDS Production Test Circuit
Figure 5 - Waveform Diagram
Absolute Maximum Ratings
Parameter
Power Supply
Input Current
Output Current
Output Enable
Storage Temperature
Soldering Temperature / Duration
Symbol
V
DD
I
IN
I
OUT
OE
T
STR
T
PEAK
/ t
P
Ratings
0 to 3.8
100
25
0 to V
DD
-55 to 125
260 / 40
Unit
V
mA
mA
V
°C
°C / sec
Page 3 of 9
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Rev8: Feb 2014
PX-721 Single Frequency HPLL XO
LVPECL Application Diagrams
+3.3V
OE or NC
10nF
1nF
1
6
10nF
OE or NC
2
5
10nF
3
4
240
240
1
6
130
OE or NC
2
5
10nF
3
4
82
82
130
10nF
OE or NC
+3.3V
10nF
+3.3V
1nF
Figure 6 - Single Resistor Termination Scheme
Resistor values are typically 120 to 240 ohms for 3.3V operation and 82 to 120 ohms for 2.5V
operation.
Figure 7 - Pull Up Pull Down Termination
Resistor values are typically for 3.3V operation
For 2.5V operation, the resistor to ground is 62 ohms and the resistor to supply is 240 ohms
There are numerous application notes on terminating and interfacing PECL logic and the two most common methods are a single resistor to ground, Figure 6,
and a pull-up/pull-down scheme as shown in Figure 7. An AC coupling capacitor is optional, depending on the application and the input logic requirements of
the next stage.
One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-
terminated, and if one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching
into account. Load matching and power supply noise are the main contributors to jitter related problems.
LVDS Application Diagrams
+3.3V
OE or NC
10nF
1nF
1
6
Receiver
100
3
4
+3.3V
OE or NC
10nF
1nF
1
6
10nF
100
3
4
Receiver
OE or NC
2
5
OE or NC
2
5
10nF
Figure 8 - LVDS to LVDS, internal 100Ω
Some LVDS structures have an internal 100 ohm resistor on the
input and do not need additional components.
Figure 9 - LVDS to LVDS, External 100Ω and AC block ing caps
One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-
terminated, and if one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching
into account. Load matching and power supply noise are the main contributors to jitter related problems.
Page 4 of 9
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Rev8: Feb 2014
PX-721 Single Frequency HPLL XO
Typical Characteristics
Figure 10 - Typical Phase Noise/Jitter Performance - INTEGER Mode
Page 5 of 9
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Rev8: Feb 2014
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