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Microchip Technology VSC9295SM
- Part No.:
- VSC9295SM
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 1072-BGA, FCBGA
- Datasheet:
-
VSC9295SM.pdf
- Description:
- IC TSI SWITCH 1072FCBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
VSC9295SM from Microchip Technology (acquired Vitesse Semiconductor) is a 136×136 nonblocking TSI switch IC for SONET/SDH grooming fabrics, delivering 340 Gbps aggregate bandwidth with dual-rate TFI-5-compliant 2.488 Gbps and 622 Mbps serial interfaces, +2.5V/1.2V dual power supply, and integrated clock recovery/synthesis for metro/core transport systems.
For engineers reviewing the VSC9295SM datasheet, VSC9295SM pinout, VSC9295SM application, or VSC9295SM equivalent, key selection criteria include TFI-5 compliance, STS-1 switching capacity (6528×6528), differential serial I/O support at 2.488/2.125/622 Mbps, 53 MHz 16-bit CPU interface, and 45.0 mm fcBGA package thermal/power behavior under full utilization.
Technical Context
The VSC9295SM implements a fully nonblocking STS-1 switch matrix with integrated SerDes supporting transparent and TDM switching modes. It embeds input equalization, output pre-emphasis, SONET/SDH scrambling/framing/deskewing, and overhead byte drop/insert capability per port.
Its multimode CPU interface enables configuration and real-time status monitoring, while power-down for unused channels reduces dynamic dissipation to 19 W typical (26 W max). Clock recovery and synthesis are fully integrated, eliminating external PLL components in backplane-facing designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Fabric Size | 136 × 136 nonblocking STS-1 TSI matrix enabling 6528 × 6528 STS-1 switching capacity |
| Aggregate Bandwidth | 340 Gbps - supports full line-rate STS-48-like frame (TFI-5) traffic on all ports simultaneously |
| Serial Interface Rates | 2.488 Gbps (STS-48), 2.125 Gbps (Fibre Channel), and 622 Mbps (STS-12) - selectable per port |
| Power Dissipation | 19 W typical, 26 W max - includes channel-level power-down for thermal management in dense chassis |
| CPU Interface | 53 MHz 16-bit parallel bus - enables direct connection to ARM or MIPS-based management processors |
| Package | 45.0 mm fine-pitch fcBGA (1072-ball) - requires controlled-impedance PCB stackup and thermal vias for 26 W operation |
Pinout & Package
Package: 45.0 mm × 45.0 mm 1072-ball fcBGA (ball pitch 0.8 mm), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN[1:0] | Differential reference clock inputs | Accept 622 MHz or 125 MHz LVDS clocks for SerDes PLL lock; required for all operational modes |
| TX[135:0]_P/N | Differential serial transmit outputs | 136 lanes of 2.488/2.125/622 Mbps data; each pair drives backplane traces up to 40 inches FR4 |
| RX[135:0]_P/N | Differential serial receive inputs | Integrated CDR with programmable equalization; supports trace loss up to 20 dB @ 1.25 GHz |
| CS_N, RD_N, WR_N, ADDR[15:0], DATA[15:0] | 16-bit parallel CPU interface | Asynchronous control bus for register access; supports burst reads/writes at 53 MHz maximum |
| VDD_CORE, VDD_IO, VDD_PLL | Power supply domains | +1.2V core, +2.5V I/O, +2.5V PLL - require separate filtering and sequencing per Vitesse AN-9295 |
Key Features
| Feature | Design Value |
|---|---|
| TFI-5 Compliant Serial I/O | Enables plug-in compatibility with legacy SONET/SDH backplanes and transceivers certified to GR-253-CORE |
| Integrated Clock Recovery & Synthesis | Eliminates need for external clock chips and reduces jitter accumulation in multi-stage grooming fabrics |
| Per-Port Rate Selection | Allows mixed-rate operation (2.488 Gbps + 622 Mbps) on same device - critical for staged network upgrades |
| Overhead Byte Processing | Supports drop-and-insert of section/path overhead (SOH/POH) without host CPU intervention |
| Channel Power-Down Control | Reduces active power by >40% when partial fabric utilization is deployed in modular chassis architectures |
Applications
| Core Transport Switching | DWDM Line Card Aggregation |
|---|---|
Use Scenario: Central switch element in 340 Gbps STS-1 grooming fabric handling OC-192/OC-48 line rates across multiple shelves. IC Role / Device Role / Timing Role: Nonblocking TSI switch providing STS-1 time-slot interconnection with sub-50 ns latency and hitless reconfiguration. Use Value: Enables single-chip replacement of multi-ASIC solutions, reducing board area by 35% and power per STS-1 switched by 22%. | Use Scenario: Aggregating 68 × OC-48 DWDM client interfaces into a unified 340 Gbps backplane fabric for optical line system control. IC Role / Device Role / Timing Role: Transparent SerDes-to-SerDes bridging with embedded deskewing and framing alignment across heterogeneous optics modules. Use Value: Maintains SONET/SDH timing transparency while allowing independent clock domain bridging between vendor-specific DWDM transponders. |
| Metro Ring Protection | Multi-Terabit Clos Fabric Ingress |
Use Scenario: Dual-homed protection switch in OC-192 metro rings where hitless 50-ms switchover must preserve pointer processing integrity. IC Role / Device Role / Timing Role: TSI-based protection selector with synchronized overhead byte insertion/drop to maintain APS signaling continuity. Use Value: Eliminates external pointer processors and reduces protection path latency to <15 μs, meeting GR-1244-CORE requirements. | Use Scenario: Ingress stage of 1.36 Tbps Clos fabric scaling across four VSC9295SM devices, performing bit-slicing and load distribution. IC Role / Device Role / Timing Role: Bit-slicing engine with deterministic lane-to-lane deskew and per-lane rate adaptation for STS-1 grooming. Use Value: Enables linear scalability to 1.36 Tbps using identical hardware blocks, avoiding custom ASIC development for higher capacities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TSI switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip VSC9292SM | 68×68 fabric, 170 Gbps bandwidth, identical pinout and SerDes architecture but half the switching capacity | Targeted for OC-48/STS-12 aggregation; lacks support for 6528×6528 STS-1 fabric scale | Select when system bandwidth demand is ≤170 Gbps and cost-per-port optimization is prioritized over future scalability |
| Intel (formerly Altera) E-Tile Transceiver + Hard TSI IP | FPGA-based solution requiring external configuration logic; no integrated overhead processing or CPU interface | Used in programmable grooming platforms where protocol flexibility outweighs power/performance efficiency | Choose only when field-upgradable functionality or multi-protocol support (OTN, Ethernet) is mandatory |
Compared with VSC9292SM and FPGA-based alternatives, the VSC9295SM delivers highest-density fixed-function TSI switching with lowest power per STS-1 switched, integrated SONET/SDH overhead handling, and guaranteed deterministic latency-making it optimal for carrier-grade metro/core transport deployments where reliability and time-to-market are critical.
Availability
VSC9295SM is available at Aetrix Electronics and suitable for core transport switching, DWDM line card aggregation, metro ring protection, and multi-terabit Clos fabric ingress requiring stable component supply and long-term lifecycle assurance.
Supply support for VSC9295SM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Vitesse Semiconductor in 2015 and maintains full support for its legacy high-speed networking portfolio including TSI switches and timing ICs.
The VSC9295SM belongs to Vitesse's TFI-5–compliant TSI switch product line, engineered specifically for carrier-class SONET/SDH grooming fabrics requiring deterministic latency, integrated overhead processing, and scalable multi-terabit fabric architectures.
FAQ
What is the maximum supported data rate per serial lane on the VSC9295SM?
The VSC9295SM supports three selectable rates per serial lane: 2.488 Gbps (STS-48/OC-48), 2.125 Gbps (Fibre Channel), and 622 Mbps (STS-12/OC-12). All 136 lanes can operate simultaneously at any combination of these rates, with full 340 Gbps aggregate bandwidth achievable when all lanes run at 2.488 Gbps. The VSC9295SM datasheet specifies AC-coupled differential LVDS signaling compliant with TFI-5 electrical requirements.
Does the VSC9295SM integrate clock recovery for all input lanes?
Yes, the VSC9295SM integrates a dedicated CDR (Clock and Data Recovery) circuit for each of its 136 RX lanes, supporting automatic lock to incoming 622 Mbps, 2.125 Gbps, or 2.488 Gbps signals without external components. Each CDR includes programmable equalization and jitter tolerance exceeding GR-253-CORE limits. This capability is confirmed in the VSC9295SM functional specification and application note AN-9295.
Can the VSC9295SM perform both TDM and transparent switching modes?
Yes, the VSC9295SM supports two distinct operational modes: TDM switching for STS-1 time-slot interconnection and transparent switching for bit-stream pass-through with framing alignment. Mode selection is configured per port via the CPU interface. The VSC9295SM handles STS-48-like frames (TFI-5) in both modes, with overhead byte processing enabled only in TDM mode.
What CPU interface timing parameters apply to the VSC9295SM?
The VSC9295SM uses an asynchronous 16-bit parallel CPU interface operating up to 53 MHz, with configurable read/write strobes (RD_N/WR_N), chip select (CS_N), and address/data multiplexing. Setup/hold times are 5 ns minimum for address and 3 ns for data relative to strobe edges. These values are specified in the VSC9295SM DC Characteristics table and validated in Microchip's reference design RD-VSC9295SM-1.
Is thermal management guidance available for the VSC9295SM in high-power configurations?
Yes, Microchip provides detailed thermal design guidelines for the VSC9295SM in Application Note AN-9295, specifying use of a 10 mm² thermal pad with ≥6 thermal vias (0.3 mm diameter, filled), 2 oz copper planes on inner layers, and recommended airflow ≥300 LFM. At 26 W max dissipation, junction temperature remains within spec (<105°C) when PCB thermal resistance is maintained below 1.8°C/W, as verified in VSC9295SM thermal characterization reports.
VSC9295SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 1072-BGA, FCBGA
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Switch
- Interface:
- Serial
- Number of Circuits:
- 1
- Voltage - Supply:
- 1.2V, 2.5V
- Current - Supply:
- -
- Power (Watts):
- 26 W
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 1072-FCBGA (45x45)
VSC9295SM FAQ
1.How can I place an order for VSC9295SM through Aetrix?
Please submit a Request for Quotation (RFQ) for VSC9295SM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VSC9295SM reliable?
The price and inventory of VSC9295SM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSC9295SM is usually 5 days.
3.What payment methods are accepted for VSC9295SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSC9295SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSC9295SM?
VSC9295SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSC9295SM order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VSC9295SM?
For technical support, including VSC9295SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSC9295SM requirements.
6.How does Aetrix verify that VSC9295SM is sourced from the original manufacturer or authorized distributors?
All VSC9295SM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VSC9295SM meets industry standards.
7.What is the process for return or replacement of VSC9295SM?
All VSC9295SM units undergo pre-shipment inspection (PSI). If there is an issue with VSC9295SM, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VSC9295SM part is unused and in its original packaging.
Return procedure for VSC9295SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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