参数资料
型号: SCG2500-77.76M
厂商: Connor-Winfield
文件页数: 4/10页
文件大小: 0K
描述: IC OSC CLK GEN 77.76MHZ OUT SMD
标准包装: 1
类型: 时钟发生器
PLL:
输入: 时钟
输出: CMOS
电路数: 1
比率 - 输入:输出: 3:1
差分 - 输入:输出: 无/无
频率 - 最大: 77.76MHz
除法器/乘法器: 是/无
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-SMD 模块
包装: 管件
其它名称: CW640
SCG2500 77.76M
SCG250077.76M
Preliminary Data Sheet #: SG027
Page 3 of 10
Rev: 02
Date: 03/15/02
Copyright 2002 The Connor-Winfield Corp.
All Rights Reserved Specifications subject to change without notice
Input Selection / Output Response
Table 5
All SCG2500 Models
INPUTS
OUPUTS
Reset/
Oscillator
8 kHz
Notes
Tri-State
SEL
AB
REF
A
REF
B
FR
status
Alarm
Output
1
X
XXXTS
TS
FR
TS
0
X
1
FR
0
A
0
LRA
LRAD
0
1
NA
A
0
LRB
LRBD
0
NA
A
001
U
5.0
0
1
A
NA
001
U
5.0
0
A
NA
0
LRA
LRAD
0
X
NA
0
1
FR
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 ALARM must be less than 10s
5.0
On alarm assertion, switch references. If alarm is still active, force Free Run
TS = Tri-State
U = Unstable
FR = Free Run
LRAD = Locked to Ref A and divided down
LRA = Locked to Ref A
LRAB = Locked to ref B and divided down
LRB = Locked to Reb B
X = Don’t care
Output Jitter Specifications
Table 4
All SCG2500 Models (Ver. 2)
Jitter BW 10 Hz - 1 MHz
SONET Jitter BW 12 kHz - 20 MHz
Frequency (MHz)
pS (RMS)
m UI
pS (RMS)
m UI
1.544
30 Typ.
0.046 Typ.
4 Typ.
0.006 Typ.
2.048
30 Typ.
0.061 Typ.
4 Typ.
0.008 Typ.
19.44
10 Typ.
0.194 Typ.
1 Max., 0.5 Typ.
0.019 Max.
20.48
10 Typ.
0.205 Typ.
1 Max., 0.5 Typ.
0.020 Max.
34.368
10 Typ.
0.344Typ.
1 Max., 0.5 Typ.
0.034Max.
44.736
10 Typ.
0.447Typ.
1 Max., 0.5 Typ.
0.045 Max.
51.84
10 Typ.
0.518 Typ.
1 Max., 0.5 Typ.
0.052 Max.
77.76
10 Typ.
0.778Typ.
1 Max., 0.5 Typ.
0.078 Max.
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