參數(shù)資料
型號: ISPPAC-CLK5304S-01T48C
廠商: Lattice Semiconductor Corporation
文件頁數(shù): 10/56頁
文件大?。?/td> 0K
描述: IC BUFFER FANOUT ISP UNIV 48TQFP
標準包裝: 250
系列: ispClock™
類型: 時鐘發(fā)生器,扇出配送,零延遲緩沖器
PLL: 帶旁路
輸入: HSTL,LVCMOS,LVDS,LVPECL,LVTTL,SSTL
輸出: eHSTL,HSTL,LVCMOS,LVTTL,SSTL
電路數(shù): 1
比率 - 輸入:輸出: 2:4
差分 - 輸入:輸出: 是/無
頻率 - 最大: 267MHz
除法器/乘法器: 是/無
電源電壓: 3 V ~ 3.6 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應商設備封裝: 48-TQFP(7x7)
包裝: 托盤
Lattice Semiconductor
ispClock5300S Family Data Sheet
18
Figure 12. PLL Loop Bandwidth vs. Feedback Divider Setting (Nominal)
VCO
The ispClock5300S provides an internal VCO which provides an output frequency ranging from 160MHz to
400MHz. The VCO is implemented using differential circuit design techniques which minimize the inuence of
power supply noise on measured output jitter. The VCO is also used to generate output clock skew as a function of
the total VCO period. Using the VCO as the basis for controlling output skew allows for highly precise and consis-
tent skew generation, both from device-to-device, as well as channel-to-channel within the same device.
Output V Dividers
The ispClock5300S incorporates a set of three 5-bit programmable Power of 2 dividers which provide the ability to
synthesize output frequencies differing from that of the reference clock input.
Each one of the three V dividers can be independently programmed to provide division ratios ranging from 1 to 32
in Power of 2 steps (1, 2, 4, 8, 16, 32).
PLL Bandwidth vs.
VCO Frequency and V-Divider
(Standard Mode)
Dynamic Phase Offset vs.
Input Frequency and Modulation Index (MI)
(Vdiv = 2)
Dynamic Phase Offset vs.
Input Frequency and Modulation Index (MI)
(Vdiv = 4)
PLL Loop Bandwidth vs.
VCO Frequency and V-Divider
(Spread Spectrum Compatible Mode)
100
80
100 120 140 160 180 200 220 240 260
40
60
80
100
120
140
0.0
50
60
50
40
30
20
10
0
40
30
20
10
0
1.0
2.0
3.0
4.0
5.0
6.0
200
300
400
500
Vdiv=1
Vdiv=2
Vdiv=4
Vdiv=8
Vdiv=16
Vdiv=32
MI = 0.25%
MI = 0.50%
MI = 1.0%
MI = 2.0%
Vdiv=32
Vdiv=16
Vdiv=8
Vdiv=4
Vdiv=2
Band
width
(MHz)
VCO Frequency (MHz)
100
200
300
400
500
600
VCO Frequency (MHz)
Input Frequency (MHz)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Band
width
(MHz)
T
PDJ
(ps
RMS)
T
PDJ
(ps
RMS)
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