VSC7126 Datasheet, PDF (1/16 Pages) Vitesse Semiconductor Corporation – 1.0625 Gbits/sec Fibre Channel Transceiver

Datasheet
VSC7126
VITESSE
SEMICONDUCTOR CORPORATION
1.0625 Gbits/sec Fibre
Channel Transceiver
Features
• ANSI X3T11 Fibre Channel Compatible 1.0625
Gbps Full-duplex Transceiver
• GLM Compatible (FCSI-301-Rev 1.0)
• 20 Bit TTL Interface For Transmit And Receive Data
• Monolithic Clock Synthesis And Clock Recovery -
No External Components
• 53.125 MHz TTL Reference Clock
• Automatic Lock-to-Reference Function
• Suitable For Both Copper And Fiber
Optical Link Applications
• Low Power Operation - 850 mW
• 80 Pin, 14x14 mm PQFP
• Single +3.3V Power Supply
General Description
The VSC7126 is a full-speed Fibre Channel Transceiver optimized for Host Adapter and other space- con-
strained applications. It accepts two 10-bit 8B/10B encoded transmit characters, latches them on the rising edge
of TBC and serializes the data onto the TX+/- PECL differential outputs at a baud rate which is twenty times the
TBC frequency. It also samples serial receive data on the RX+/- PECL differential inputs, recovers the clock
and data, deserializes it onto two 10-bit receive characters, outputs a recovered clocks at one twentieth of the
incoming baud rate and detects Fibre Channel “Comma” characters. The VSC7126 contains on-chip PLL cir-
cuitry for synthesis of the baud-rate transmit clock, and extraction of the clock from the received serial stream.
These circuits are fully monolithic and require no external components.
VSC7126 Block Diagram
EWRAP
R0:19
RBC(0)
RBC(1)
L_UNUSE
COM_DET
EN_CDET
T0:19
TBC
TXEN#
20
QD
Serial to
Parallel
53.125 MHz
÷ 20
Frame
Logic
Comma
Detect
20
DQ
Parallel
to Serial
53.125 MHz
PLL Clock
Multiply (x20)
QD
Retimed
Data
Recovered
Clock
Clock
Recovery
2:1
DQ
Serial Data
Synthesized
Clock
RX+
RX-
TX+
TX-
G52148-0, Rev. 4.3
3/4/99
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: [phone]
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