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参数资料
| 型号： | SCG2500AI-019.44M |
| 厂商： | CONNOR WINFIELD CORP |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 51.84 MHz, OTHER CLOCK GENERATOR, DSO14 |
| 封装： | 0.78 X 0.83 X 0.35 INCH, DIL-14 |
| 文件页数： | 6/12页 |
| 文件大小： | 938K |
| 代理商： | SCG2500AI-019.44M |
Preliminary Data Sheet #: SG071
Page 3 of 12
Rev: P00
Date: 03/07/03
Copyright 2003 The Connor-Winfield Corp.
All Rights Reserved Specifications subject to change without notice
NOTES:
1.0
Requires external regulation
2.0
Externally selectable via Input Select AB
3.0
From a 20 ppm offset in reference frequency
4.0
Entry into Free Run doesn’t meet requirement for initial 2.33 seconds of self-timing
4.1
If the selected reference is removed, system response to the LOL ALARM must be less than 100ns
5.0
Upon power-up, allow 60 seconds for the SCG to obtain tight phase lock.
6.0
Static offset will accumulate with each reference switch for the Reference Output only.
7.0
Frequency will drift to lower limit rail if not switched.
8.0
Loss of both references will automatically force Free Run. Change the Force Free Run (pin 5) to 1 upon detection of this condition.
9.0
Phase Drift from -40° to 85°C.
Output Jitter Specifications
Table 4
Jitter BW 10 Hz - 20 MHz
SONET Jitter BW 12 kHz - 20 MHz
Frequency (MHz)
pS (RMS)
m UI
pS (RMS)
m UI
19.44
10 Typ.
0.194 Typ.
1 Max., 0.5 Typ.
0.019 Max.
51.84
10 Typ.
0.518 Typ.
1 Max., 0.5 Typ.
0.052 Max.
Operational Table
Table 5
INPUTS
OUTPUTS
Select
A/B
Ref A
Ref B
Force
Free Run
Oscillator
Output
Ref Out
LOL
LOR A
LOR B
X
A
1
FR
0
1
XNA
A
1
FR
0
1
XA
NA
1
FR
0
1
0
X
NA
0 **
FR
0
A
0
RA
1
0A
NA
0
RA
1
0
0NA
A
0
U
0
1
A
0
RB
1
1NA
A
0
RB
1
0
1
1A
NA
0
U
0
1
0
Notes:
A = Active
NA = Not Active
FR = Free Run
RA = Locked to Reference A
RB = Locked to Reference B
U = Unstable (See note 7)
X = Don't Care
** See Note 8.0
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