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參數(shù)資料
| 型號： | SY877021 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 3.3V 28Mbps-2.5Gbps AnyRate Clock and Data Recovery(用于數(shù)據(jù)傳輸速率為28Mbps到2.5Gbps的時鐘恢復(fù)和數(shù)據(jù)重定時電路) |
| 中文描述： | 3.3 28Mbps - 2.5Gbps的AnyRate時鐘和數(shù)據(jù)恢復(fù)（用于數(shù)據(jù)傳輸速率為28Mbps到2.5Gbps的的時鐘恢復(fù)和數(shù)據(jù)重定時電路） |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 151K |
| 代理商： | SY877021 |
PRELIMINARY
SY87702L
6
Micrel
VCOSEL1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
VCOSEL2
0
0
0
0
0
1
1
0
1
1
1
1
1
1
1
1
FREQSEL1
0
0
0
1
1
0
0
0
0
0
0
0
1
1
1
1
FREQSEL2
0
0
1
0
1
0
0
0
0
0
1
1
0
0
1
1
FREQSEL3
0
1
0
0
0
0
1
0
0
1
0
1
0
1
0
1
Range (Mbps)
2488 (OC48)
1244
622 (OC12)
311
155 (OC3)
1800
–
2500
900
–
1250
(1)
1250
–
1800
650
–
1300
(2)
325
–
650
(3)
163
–
325
109
–
216
82
–
162
55
–
108
41
–
81
28
–
54
Table 4.
(4)
DESCRIPTION
General
The SY87702L is a complete clock and data recovery
circuit, capable of dealing with NRZ data rates from 28Mbps
through to 2.5Gbps. A reference PLL is used as a frequency
synthesizer, both to multiply a clock to the desired transmit
rate, and to train the recovery PLL in preparation for actual
data recovery.
VCO Selection
SY87702L has four complete VCO circuits. Depending
of the application and the frequency range, any one of
these four perform data recovery.
As indicated by the VCO selection table, there are three
general purpose VCOs, covering one of three frequency
ranges. However, to extend the range of the device, the
output of the VCO may be divided down.
In the case of the two highest frequency VCO, this divisor
is always set to 1. For the lowest frequency VCO, the
FREQSEL pins select which divisor, and hence, which range
of frequencies the VCO will work over.
In addition, for SONET/SDH applications, there is a narrow
band, extremely low jitter PLL. It also uses the FREQSEL
divisor to choose the correct SONET/SDH frequency.
The various combinations of FREQSEL and VCOSEL
are not arbitrary, but are limited to the subset shown in
Table 4, where the range column indicates frequency in
Mbps.
NOTES:
1. Suggested range for Fibre Channel applications.
2. REFCLK multiplier of 2 is not allowed in this range.
3. REFCLK multiplier of 1 is not allowed in this range.
4. Combinations of VCOSEL and FREQSEL other then those in this table result in undefined behavior, and should not be
used.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY87702L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AnyRate? CDR |
| SY87702L_06 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V 28Mbps-2.5Gbps AnyRate CLOCK AND DATA RECOVERY |
| SY87702LHG | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V 28Mbps-2.5Gbps AnyRate CLOCK AND DATA RECOVERY |
| SY87702LHGTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V 28Mbps-2.5Gbps AnyRate CLOCK AND DATA RECOVERY |
| SY87702LHI | 功能描述:IC CLOCK/DATA RECOVERY 64-TQFP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:AnyRate® 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
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