All Rights Reserved
參數(shù)資料
型號(hào): SCG2500-77.76M
廠商: Connor-Winfield
文件頁(yè)數(shù): 4/10頁(yè)
文件大?。?/td> 0K
描述: IC OSC CLK GEN 77.76MHZ OUT SMD
標(biāo)準(zhǔn)包裝: 1
類型: 時(shí)鐘發(fā)生器
PLL:
輸入: 時(shí)鐘
輸出: CMOS
電路數(shù): 1
比率 - 輸入:輸出: 3:1
差分 - 輸入:輸出: 無(wú)/無(wú)
頻率 - 最大: 77.76MHz
除法器/乘法器: 是/無(wú)
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 14-SMD 模塊
包裝: 管件
其它名稱: 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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