VSC7121 Vitesse Semiconductor Corp., VSC7121 Datasheet
VSC7121
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VSC7121 Summary of contents
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... Using a VSC7121 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 VSC7121 is cascaded in a manner such that all the 7121’s inter- nal PBC’s are used in the same loop. For dual loop implementations, two or more VSC7121’s should be used. ...
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... Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays Table truth table detailing the data flow through the VSC7121. Figure 1 shows a timing diagram of the data relationship in the VSC7121. There are no critical timing (setup, hold, or delay) parameters for the VSC7121 as this part routes the serial data encoded with the baud clock that is extracted by a Fibre Channel receiver ...
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... Data Sheet VSC7121 Optics Dual Copper DB-9 JBOD G52110-0, Rev. 4.1 8/31/98 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays Figure 2: Disk Array Application 7120 ...
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... VITESSE SEMICONDUCTOR CORPORATION Data Sheet VSC7121 Units Conditions Delay with all circuits bypassed Ohm Load Delay with all circuits bypassed Ohm load. ps. 20% to 80%, tested on a sample basis Units Conditions ...
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... Data Sheet VSC7121 Absolute Maximum Ratings TTL Power Supply Voltage, (V PECL DC Input Voltage, (V INP TTL DC Input Voltage ..........................................................................................................-0.5V to 5.5V INT DC Voltage Applied to Outputs for High Output State, (V TTL Output Current (I ), (DC, Output High)........................................................................................... 50mA OUT PECL Output Current (DC, Output High) ......................................................................................-50mA ...
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... Because the VSC7121 output buffers are PECL outputs referenced to V puts may not be direct coupled to the high speed differential inputs. One example of how to differentially cas- cade the two VSC7121 is shown in Figure 4. This circuit only applies if trace lengths are less than three inches. VSC7121 Page 6 741 Calle Plano, Camarillo, CA 93012 • ...
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... Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays Figure 5: Pin Diagram VSC7121 VITESSE SEMICONDUCTOR CORPORATION 35 33 VSS VDD ...
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... Ground. Ground pins are physically attached to the die mounting surface, and are an important part of the thermal path. For best thermal performance, all ground pins should be connected to a ground plane, using multiple vias if possible. VITESSE SEMICONDUCTOR CORPORATION Data Sheet VSC7121 G52110-0, Rev. 4.1 8/31/98 ...
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... Data Sheet VSC7121 Package Information 0.30 RAD. TYP. 0.20 RAD. TYP. NOTES: Drawing not to scale. Cavity up All units in mm unless otherwise noted. G52110-0, Rev. 4.1 8/31/98 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Quad Port Bypass Circuit for 1.0625 Gbit/sec ...
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... Fibre Channel Arbitrated Loop Disk Arrays Package Thermal Characteristics The VSC7121 is packaged into a standard plastic quad flatpack with an embedded, but unexposed thermal slug. This package adheres to industry standard EIAJ footprints for a 10x10mm body, 44 lead PQFP. The pack- age construction is as shown in Figure 6. The 44 PQFP with embedded slug has the thermal properties shown in Table 5 ...
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... Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays VSC71XX QM VSC7121 - 1.0625 Gbits/sec Port Bypass Circuit VITESSE VSC7121QM ####AAAA Lot Tracking Code Date Code VITESSE SEMICONDUCTOR CORPORATION Package Suffi ...
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... Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays Page 12 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION VITESSE SEMICONDUCTOR CORPORATION Data Sheet VSC7121 G52110-0, Rev. 4.1 8/31/98 ...