參數(shù)資料
型號: SY87739LHI
廠商: Micrel Inc
文件頁數(shù): 5/17頁
文件大?。?/td> 0K
描述: IC SYNTHESIZER FRACT 3.3V 32TQFP
標(biāo)準(zhǔn)包裝: 250
系列: AnyClock®
類型: 分?jǐn)?shù)合成器
PLL:
主要目的: 以太網(wǎng),光纖通道,SONET/SDH/ATM
輸入: PECL
輸出: PECL
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 729MHz
電源電壓: 3.15 V ~ 3.45 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-EPAD-TQFP
包裝: 托盤
Micrel, Inc.
SY87739L
June 2011
13
M9999-061511
hbwhelp@micrel.com
Standard Protocol Applications
From
a
single
27.000MHz
reference
input,
the
SY87739L can generate exactly correct frequencies for
at least the 18 wrapper, then modify the NdivSel and
MdivSel bits protocols listed in Table 7. This table also
shows how to program the SY87739L for each protocol
listed. This table assumes no digital wrapper. If your
system includes such a can generate exactly correct
frequencies for at least the 18 wrapper, then modify the
NdivSel and MdivSel bits accordingly.
Loop Filter Values
Each PLL in the SY87739L adjusts its loop gain through
an
external
loop
filter.
Figure
4
shows
Micrel’s
recommended values for these.
Figure 4. Recommended Loop Filter Values
Protocol
SY87739L FOUT (MHz)
Programming Bits
ETR
32
0000 10011 01000 0111 000 10010 101 101
OC-1
51.84
0000 00001 11000 0111 000 01100 101 101
Fast Ethernet
50
0000 00010 11001 1000 000 01101 101 101
FDDI
125
0000 00100 10111 0111 000 00101 101 101
1/8 Fibre Channel
13.28125
0000 01011 00111 0111 000 11100 101 101
General
150
0000 00010 00111 0110 000 00100 101 101
OC-3/STM-1
155.52
0000 00001 11000 0111 000 00100 101 101
ESCON
50
0000 00010 11001 1000 000 01101 101 101
1/4 Fibre Channel
26.5625
0000 01011 00111 0111 000 10100 101 101
1/2 Fibre Channel
53.125
0000 01011 00111 0111 000 01100 101 101
OC-12/STM-4
622.08
0000 00011 11000 0111 000 00000 101 101
Fibre Channel
106.25
0000 01011 00111 0111 000 00110 101 101
Gigabit Ethernet
156.25
0000 00100 10111 0111 000 00100 101 101
D1 Video
69
0000 00001 00000 0110 000 01001 101 101
HDTV
92.8125
0000 00001 01111 1000 000 00111 101 101
Infiniband
125
0000 00100 10111 0111 000 00100 101 101
2x Fibre Channel
212.5
0000 01011 00111 0111 000 00011 101 101
OC-48/STM-16
155.52
0000 00001 11000 0111 000 00100 101 101
OC-48/STM-16
622
0000 00001 11000 0111 000 00000 101 101
Table 7. Protocol Listings
or (408) 955-1690
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