VSC9191XYX

Overview

The VSC9191 is a 100 Gbps Time Slot Interchange (TSI) switch featuring a non-blocking 1920 x 1920 STS-1 matrix. It supports dual-rate I/O with 40 ports capable of operating at 2.5 Gbps or 622 Mbps for TDM signals, and up to 2.488 Gbps for transparent routing. The device integrates clock synthesis supporting reference frequencies of 78 MHz, 155 MHz, and 311 MHz. It utilizes a 66 MHz 16-bit microprocessor interface and operates within a 33 mm, 613-pin FCBGA package. Typical power dissipation is under 6 W, with a maximum of 8 W.

Feature Summary

• Supports hitless reconfiguration of TSI mapping and automatic protection switching at the STS-1 level.
• Includes a serial TSI-to-framer interface (TFI-5) operating at 2.488 Gbps with STS-12 support.
• Provides flexible split-frame domain support suitable for folded fabric architectures.

Applications

• Central switch units in smaller SONET/SDH systems
• Building blocks for larger 680 Gbps to 1.36 Tbps network fabrics
• Interface devices for expanding network system designs

Procurement Notes

Verify the specific revision status against the official datasheet before procurement. Confirm that the ordering suffix matches the required pinout and thermal specifications. Ensure compatibility with existing system voltage levels and clock references. Validate package integrity upon receipt to prevent mechanical damage during installation.

Selection Notes

Select this component when a 100 Gbps aggregate bandwidth is sufficient for the target application. Consider family members like the VSC9195 or VSC9295 if higher capacity or different port counts are required. Evaluate the dual-rate I/O requirements to ensure alignment with the connected line card speeds.

Part Context

The VSC9191 belongs to the Vitesse TSI Switch Family, which includes models such as the VSC9295, VSC9292, and VSC9185. These products are designed for building and managing SONET and packet systems with varying capacities. The VSC9191 specifically targets applications requiring a balance between high density and manageable power consumption.

Replacement Considerations

Direct replacements within the same functional class include the VSC9185, which offers similar 40x40 port configurations but with lower aggregate bandwidth. For scaling needs, consider the VSC9190 for smaller footprints or the VSC9295 for larger fabric expansions.

FAQ

What are the supported input/output rates for the VSC9191?

The device supports dual-rate I/O, handling 2.5 Gbps or 622 Mbps for TDM signals, and 2.125 Gbps or 2.488 Gbps for transparently routed signals.

Does the VSC9191 support hitless reconfiguration?

Yes, the device allows for hitless reconfiguration of TSI mapping and provides automatic protection switching at the STS-1 level.

How does the VSC9191 integrate into larger networks?

It can be used as a standalone central switch unit or as a building block for larger systems ranging from 680 Gbps to 1.36 Tbps when combined with other Vitesse TSIs.