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VSC7126, VSC7126QM, VSC7127

Table of contents:
Info of VSC7126
Info of VSC7126QM
Info of VSC7127

VSC7126, VSC7126QM, VSC7127 Selling Leads, Datasheet

MFG:VITESSE Package Cooled:QFP D/C:ACTEL

VSC7126, VSC7126QM, VSC7127 Datasheet download

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Part Number: VSC7126

MFG: VITESSE

Package Cooled: QFP

D/C: ACTEL

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VSC7126 General Description

The VSC7126 is a full-speed Fibre Channel Transceiver optimized for Host Adapter and other space- constrained 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 circuitry 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 Maximum Ratings

Power Supply Voltage (V_DD) Potential to GND....................................-0.5V to +4V
PECL I/O Supply Voltage (V_DDP) Potential to GND..............................-0.5V to +6V
DC Input Voltage (PECL inputs)............................................. -0.5V to V_DDP +0.5V
DC Input Voltage (TTL inputs) .......................................................... -0.5V to 5.5V
DC Output Voltage (TTL Outputs)........................................... -0.5V to V_DD + 0.5V
Output Current (TTL Outputs) .................................................................. +/-50mA
Output Current (PECL Outputs).................................................................+/-50mA
Case Temperature Under Bias .......................................................-55 to +125
Storage Temperature..................................................................... -65 to +150
Maximum Input ESD (Human Body Model)................................................... 1500 V

VSC7126 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

VSC7126 Connection Diagram

VSC7127 General Description

The VSC7127 and VSC7129 contain six cascaded Port Bypass Circuits (PBCs), the FibreTimer™ configurable Repeater/Retimer (CRU) and a Signal Detect Unit (SDU). These parts are typically used in distributing Fibre Channel signals to an array of disk drives in an FC-AL loop as illustrated in Figure 1. The first VSC7127's CRU is configured as a Repeater to attenuate jitter, the second VSC7127's CRU is bypassed to reduce power and the third VSC7127's CRU is configured as a retimer so that the output of the device is a jittercompliance point.

Each PBC is a multiplexer that is controlled by the corresponding SELx line which, if HIGH, selects the external input or, if LOW, selects the output of the previous PBC. For the VSC712xR, when MODE is LOW and SEL5 is HIGH, the CRU is a sophisticated repeater which has low latency, no peaking and attenuates jitter even at low frequencies. When MODE is HIGH and SEL5 is HIGH, the CRU is a retimer which eliminates jitter transfer but has increased latency due to an elasticity buffer which adds/drops Fibre Channel fill words in order to accomodate the difference between the baud rate of the incoming data and the local REFCLK. When SEL5 is LOW, the CRU is bypassed and powered down. The SDU monitors the analog levels of the IO+/- input and monitors the output of the CRU digitally to indicate whether valid data is present.

The VSC7127/VSC7129 are similar to the VSC7124 which does not contain the FibreTimer™ cell or CMU.

VSC7127 Maximum Ratings

TTL Power Supply Voltage (V_DD)..................................................................................................... 0.5V to +4V
PECL DC Input Voltage (VINP) ............................................................................................ -0.5V to V_DD +0.5V
TTL DC Input Voltage (VINT).......................................................................................................... -0.5V to 5.5V
DC Voltage Applied to Outputs for High Output State (V_{IN TTL}) ........................................ -0.5V to V_DD + 0.5V
TTL Output Current (I_OUT), (DC, output high) .........................................................................................+50mA
PECL Output Current, (I_OUT), (DC, output high).......................................................................................-50mA
Case Temperature Under Bias (T_C)......................................................................................... -55oC to +125oC
Storage Temperature (T_STG).................................................................................................. -65oC to + 150oC
Maximum Input ESD ................................................................................................................................ 1000V

VSC7127 Features

• ANSI X3T11 Fibre Channel Compliant
• 1.0625Gb/s Operation
• Features the FibreTimer™ Configurable Clock Recovery Unit (CRU): Repeater, Retimer or Bypassed
• Six Port Bypass Circuits (PBC)
• Analog/Digital Signal Detect (SDU)
• On-Chip Transmit Termination
• 3.3V, 700mW Power Dissipation
• Compatible with HDMP-0451 (VSC7127) or HDMP-0452 (VSC7129)
• 44-Pin, 10mm PQFP Package

VSC7127 Connection Diagram

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