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參數(shù)資料
| 型號： | VSC8131 |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | 2.488 Gbit/sec 32:1 SONET/SDH Mux with Clock Generator |
| 中文描述： | MUX/DEMUX, PQFP128 |
| 封裝： | 14 X 20 MM, 2 MM HEIGHT, HEAT SINK, PLASTIC, QFP-128 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 155K |
| 代理商： | VSC8131 |
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 805/388-3700 FAX: 805/987-5896
Page 5
11/9/99
VITESSE
Preliminary Datasheet
VSC8131
2.488 Gbit/sec
32:1 SONET/SDH Mux with Clock Generator
G52249-0, Rev. 3.0
Supplies
This device is specified as a LVPECL device with a single +3.3V supply. Normal operation is to have
V
CC
=+3.3V and V
EE
=ground. Should the user desire to use the device in an ECL environment with a negative
3.3V supply, then V
CC
will be ground and V
EE
will be -3.3V. If used with V
EE
tied to -3.3V, the TTL I/O signals
are still referenced to V
EE
.
Decoupling of the power supplies is a critical element in maintaining the proper operation of the part. It is
recommended that the V
CC
power supply be decoupled using a 0.1
μ
F and 0.01
μ
F capacitor placed in parallel on
each V
CC
power supply pin as close to the package as possible. If room permits, a 0.001
μ
F capacitor should
also be placed in parallel with the 0.1
μ
F and 0.01
μ
F capacitors mentioned above. Recommended capacitors are
low inductance ceramic SMT X7R devices. For the 0.1
μ
F capacitor, a 0603 package should be used. The
0.01
μ
F and 0.001
μ
F capacitors can be either 0603 or 0403 packages.
Extra care needs to be taken when decoupling the analog power supply pins (labeled V
CCANA
). In order to
maintain the optimal jitter and loop bandwidth characteristics of the PLL contained in the VSC8131, the analog
power supply pins should be filtered from the main power supply with a 10
μ
H C-L-C pi filter. If preferred, a
ferrite bead may be used to provide the isolation. The 0.1
μ
F and 0.01
μ
F decoupling capacitors are still required
and must be connected to the supply pins between the device and the C-L-C pi filter (or ferrite bead).
For low frequency decoupling, 47
μ
F tantalum low inductance SMT caps are sprinkled over the board’s
main +3.3V power supply and placed close to the C-L-C pi filter.
If the device is being used in an ECL environment with a negative 3.3V supply, then all references to decou-
pling V
CC
must be changed to V
EE
, and all references to decoupling +3.3V must be changed to -3.3V.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VSC8132 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.488Gb/s 1:32 SONET/SDH Demux |
| VSC8132QR | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.488Gb/s 1:32 SONET/SDH Demux |
| VSC8140 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.48832Gb/s 16:1 SONET/SDH Transceiver with Integrated Clock Generator |
| VSC8140QR | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.48832Gb/s 16:1 SONET/SDH Transceiver with Integrated Clock Generator |
| VSC8140TW | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.48832Gb/s 16:1 SONET/SDH Transceiver with Integrated Clock Generator |
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