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參數(shù)資料
| 型號(hào)： | VSC7122 |
| 廠商： | Vitesse Semiconductor Corporation. |
| 英文描述： | Rotary Switch; No. of Switch Positions:2; Circuitry:3PDT; Contact Current Max:1.5A; Indexing:30 ; Contact Rating:1.5A at 28VDC; Mounting Type:Panel; Number of Positions:2; Switch Features:30 degrees Indexing; Switch Function:3PDT |
| 中文描述： | 四端口旁路電路1.0625 Gbit / sec光纖通道仲裁環(huán)路磁盤(pán)陣列 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 93K |
| 代理商： | VSC7122 |
VITESSE
SEMICONDUCTOR CORPORATION
Page 1
8/31/98
741 Calle Plano, Camarillo, CA 93012 805/388-3700 FAX: 805/987-5896
VITESSE
Advance Product Information
VSC7122
Quad Port Bypass Circuit for 1.0625 Gbit/sec
Fibre Channel Arbitrated Loop Disk Arrays
G52155-0, Rev. 2.1
Features
General Description
The VSC7122 is a Quad Port Bypass Circuit (PBC). Four Fibre Channel PBC’s are cascaded into a single
part to minimize part count, cost, high frequency routing, and jitter accumulation. Port Bypass Circuits are used
to provide resiliency in Fibre Channel Arbitrated Loop (FC-AL) architectures. PBC’s are used within FC-AL
disk arrays to allow for resiliency and hot swapping of FC-AL drives.
A Port Bypass Circuit is a 2:1 Multiplexer with two modes of operation: NORMAL and BYPASS. In NOR-
MAL mode, the disk drive is connected to the loop. Data goes from the 7122’s L_SOn pin to the Disk Drive RX
input and data from the disk drive TX output goes to the 7122’s L_SIn pin. Refer to Figure 2 for disk drive
application. In BYPASS mode, the disk drive is either absent or non-functional and data bypasses to the next
available disk drive. Normal mode is enabled with a HIGH on the SEL pin and BYPASS mode is enabled by a
LOW on the SEL pin. Direct Attach Fibre Channel Disk Drives have an “LRC Interlock” signal defined to con-
trol the SEL function.
Using a VSC7122 in a single loop of a disk array is illustrated in Figure 2: “Disk Array Application”. FC-
AL drives are all expected to be dual loop. The VSC7122 is cascaded in a manner such that all the 7122’s inter-
nal PBC’s are used in the same loop. For dual loop implementations, two or more VSC7122’s should be used.
Allocating each VSC7122 to only one of two loops preserves redundancy, prevents a single point of failure and
lends itself to on-line maintainability.
The VSC7122 is very similar to the VSC7121 except that LSO+ outputs are all full power outputs identical
to OUT. This is useful in passive backplanes to provide additional amplitude on long traces.
7122 Block Diagram
Supports ANSI X3T11 1.0625 Gbit/sec
FC-AL Disk Attach for Resiliency
Fully Differential for Minimum
Jitter Accumulation.
Quad PBC’s in Single Package
TTL Bypass Select
High Speed, PECL I/O’s Referenced to V
DD
.
0.35W Typical Power Dissipation
3.3V Power Supply
44-Pin, 10mm PQFP
L
L
L
L
IN+
IN-
OUT+
OUT-
S
L
L
L
L
S
L
L
L
L
S
L
L
L
L
S
1
0
0
1
0
1
0
1
PBC1
PBC2
PBC3
PBC4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VSC7123QN | 10-Bit Transceiver for Fibre Channel and Gigabit Ethernet |
| VSC7123 | Rotary Switch; No. of Switch Positions:10; Circuitry:SPDT; Contact Current Max:1.5A; Indexing:30 ; Contact Rating:1.5A at 28VDC; Mounting Type:Panel; Number of Positions:10; Switch Features:30 degrees Indexing; Switch Function:SPDT |
| VSC7123RD | 10-Bit Transceiver for Fibre Channel and Gigabit Ethernet |
| VSC7123QU | Development kit; Kit Contents:Evaluation Board; For Use With:CS4955A; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No |
| VSC7124 | Rotary Switch; No. of Switch Positions:4; Circuitry:DPDT; Contact Current Max:1.5A; Indexing:30 ; Contact Rating:1.5A at 28VDC; Mounting Type:Panel; Number of Positions:4; Switch Features:30 degrees Indexing; Switch Function:DPDT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VSC7122QM | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays |
| VSC7123 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:10-Bit Transceiver for Fibre Channel and Gigabit Ethernet |
| VSC7123QN | 制造商:VITE 功能描述: |
| VSC7123QN/C | 制造商:Vitesse Semiconductor Corporation 功能描述: |
| VSC7123QU | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:10-Bit Transceiver for Fibre Channel and Gigabit Ethernet |
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