VSC7122 Vitesse Semiconductor Corp., VSC7122 Datasheet
VSC7122
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VSC7122 Summary of contents
Page 1
... 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. ...
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... PBC’s can be hardwired to bypass with a external pulldown resistor. Table truth table detailing the data flow through the VSC7122. Figure 1 shows a timing diagram of the data relationship in the VSC7122. There are no critical timing (setup, hold, or delay) parameters for the VSC7122 as this part routes the serial data encoded with the baud clock that is extracted by a Fibre Channel receiver ...
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... Advance Product Information VSC7122 Optics Dual Copper DB-9 JBOD G52155-0, Rev. 2.1 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 ...
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... VITESSE SEMICONDUCTOR CORPORATION Advance Product Information VSC7122 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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... Advance Product Information VSC7122 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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... Refer to Figure 3 for High Speed, Differential Input structure. DD Figure 3: High Speed, Differential Inputs (L_SIn/IN) Because the VSC7122 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 VSC7122 is shown in Figure 4. ...
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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 VSC7122 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 Advance Product Information VSC7122 G52155-0, Rev. 2.1 8/31/98 ...
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... Advance Product Information VSC7122 Package Information 0.30 RAD. TYP. 0.20 RAD. TYP. NOTES: Drawing not to scale. Cavity up All units in mm unless otherwise noted. G52155-0, Rev. 2.1 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 VSC7122 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 VSC7122 VSC7122 - 1.0625 Gbits/sec Port Bypass Circuit VITESSE VSC7122QM ####AAAA Lot Tracking Code Date Code ...
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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 Advance Product Information VITESSE SEMICONDUCTOR CORPORATION VSC7122 G52155-0, Rev. 2.1 8/31/98 ...