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Microchip Technology PM42100B1-FEI
- Part No.:
- PM42100B1-FEI
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 1467-BBGA
- Datasheet:
-
PM42100B1-FEI.pdf
- Description:
- PCIE SWITCH GEN4 X100 PAX 1467BB
- Quantity:
- Payment:
- Shipping:
Inventory:1,704
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Product details
Overview
PM42100B1-FEI from Microchip Technology is a Gen 4 PCIe fabric switch IC enabling multi-host SR-IOV sharing of GPUs and NVMe SSDs in rack-scale systems, with 100 PCIe lanes, 52 ports, full hot- and surprise-plug support per port, and integrated MIPS processor for autonomous fabric management.
For engineers reviewing the PM42100B1-FEI datasheet, PM42100B1-FEI pinout, PM42100B1-FEI application, or PM42100B1-FEI equivalent, key selection criteria include lane count (100), port count (52), hot-plug controller count (52), PCIe Gen 4 16 GT/s compliance, and support for ×1*/×2/×4/×8/×16 bifurcation without upstream/downstream restrictions.
Technical Context
The PM42100B1-FEI implements a non-blocking, system-on-chip PCIe fabric switch architecture with end-to-end data integrity protection, ECC-protected on-chip RAMs, and per-port Advanced Error Reporting (AER) plus Downstream Port Containment (DPC). It supports passive, managed, and optical cabling via SFF-8644, SFF-8643, OCuLink, and SFF-8639 connectors.
Its integrated MIPS processor enables firmware-customizable fabric management without an external CPU, while ChipLink diagnostic tools provide real-time 2D eye capture, per-port TLP latency counters, and built-in PCIe analyzer with flexible triggering - all accessible over in-band PCIe, UART, TWI, or Ethernet interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Generation | Gen 4 (16 GT/s) - enables full bandwidth for high-throughput GPU/NVMe interconnects in disaggregated systems |
| Lane Count | 100 lanes - supports maximum fabric scalability across 52 configurable ports |
| Port Count | 52 ports - allows dense endpoint pooling with independent bifurcation and direction assignment |
| Hot-Plug Controllers | 52 controllers (1 per port) - ensures safe insertion/removal of PCIe devices without system reset |
| Switching Capacity | 174 GBps - delivers non-blocking throughput for concurrent multi-host traffic to shared resources |
| Package Size | 40 mm × 40 mm - standard BGA footprint compatible with high-density server PCB layouts |
| Error Containment | AER + DPC + Poisoned TLP blocking + CTS - prevents error propagation across hosts and maintains domain isolation |
Pinout & Package
PM42100B1-FEI is housed in a 40 mm × 40 mm BGA package with 1,156 pins. Pin functions are defined by I/O bank grouping and SerDes lane mapping per the official Microchip Switchtec PAX Gen 4 Hardware Design Guide (DS00002987D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCIe_TX[0:99]/RX[0:99] | High-speed differential SerDes lanes | 100 bidirectional Gen 4 lanes supporting ×1* to ×16 bifurcation and arbitrary upstream/downstream assignment |
| GPIO[0:102] | General-purpose I/O | 103 configurable pins for cable/connector detection, LED control, or enclosure management signaling |
| TWI[0:10] | Two-wire interface bus | Up to 11 SMBus-compatible buses for sensor monitoring, EEPROM access, or sideband device control |
| SGPIO[0:3] | Serial GPIO for storage enclosures | 4 SFF-8485-compliant ports for drive activity/status indication in JBOF and composable storage systems |
| UART0–UART3 | Asynchronous serial interface | 4 dedicated UARTs for debug console, out-of-band management, or host-side configuration |
| JTAG/EJTAG | Boundary-scan and debug interface | Standard test and firmware development access point for silicon validation and field diagnostics |
Key Features
| Feature | Design Value |
|---|---|
| SR-IOV Endpoint Virtualization | Enables multi-host sharing of physical and virtual functions (e.g., NVMe SSDs) without hypervisor dependency |
| Autonomous Fabric Management | Integrated MIPS processor eliminates need for external CPU, reducing BOM cost and board space |
| Real-Time Eye Capture | On-die 2D eye diagrams per PCIe Gen 4 lane enable in-system signal integrity validation without external equipment |
| Secure Boot Authentication | Hardware-enforced boot image verification prevents unauthorized firmware execution and supply-chain tampering |
| Flexible Port Bifurcation | Any port can be configured as ×1*, ×2, ×4, ×8, or ×16 - no fixed upstream/downstream constraints |
Applications
| GPU-Accelerated Compute Clusters | SR-IOV-Enabled JBOFs |
|---|---|
Use Scenario: Multi-host rack-scale systems where multiple servers concurrently access a shared pool of GPUs for AI training or HPC workloads. IC Role / Device Role / Timing Role: PCIe fabric switch managing low-latency, high-bandwidth interconnect between hosts and GPU endpoints with SR-IOV-aware routing. Use Value: Eliminates PCIe tree topology bottlenecks and enables direct GPU resource allocation across hosts without PCIe switch stacking or bandwidth oversubscription. | Use Scenario: Shared NVMe storage enclosures where multiple hosts simultaneously access virtualized NVMe namespaces via SR-IOV. IC Role / Device Role / Timing Role: Fabric manager virtualizing physical NVMe SSDs into isolated virtual functions (VFs), each assigned to a different host. Use Value: Delivers deterministic latency and guaranteed QoS per host through hardware-enforced traffic isolation and per-port error containment. |
| Composable GP-GPU Fabrics | Rack-Scale Disaggregated Systems |
Use Scenario: Dynamic allocation of GPU resources across heterogeneous workloads using software-defined infrastructure orchestration. IC Role / Device Role / Timing Role: Reconfigurable PCIe fabric node enabling runtime remapping of GPU lanes to match workload requirements. Use Value: Supports live reconfiguration of lane topology (e.g., ×16 → four ×4) without power cycle, enabling adaptive compute resource provisioning. | Use Scenario: Data center architectures separating compute, storage, and acceleration into independently scalable resource pools. IC Role / Device Role / Timing Role: High-reliability interconnect backbone providing fault-isolated communication between disaggregated resource nodes. Use Value: Achieves 174 GBps non-blocking throughput with end-to-end CRC, ECC RAM, and per-port hot-plug - critical for uptime in large-scale deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe fabric switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PM42084B1-FEI | 84-lane, 44-port, 44 hot-plug controllers - lower lane/port count in same 40 mm × 40 mm package | Suitable for mid-scale multi-host systems with fewer GPU/NVMe endpoints | Select when fabric scale requirements are below 100 lanes but same thermal/mechanical footprint is required |
| PM42068B1-FEI | 68-lane, 36-port, 36 hot-plug controllers - reduced capacity, identical Gen 4 feature set and diagnostics | Targeted at cost-optimized composable storage or edge AI inference clusters | Choose for balanced performance/cost in systems where 52-port density is unnecessary |
Compared with PM42084B1-FEI and PM42068B1-FEI, the PM42100B1-FEI delivers maximum fabric scalability (100 lanes, 52 ports) and full hot-plug coverage - essential for hyperscale rack-scale architectures requiring zero single points of failure and dynamic resource pooling.
Availability
PM42100B1-FEI is available at Aetrix Electronics and suitable for GPU-accelerated compute clusters, SR-IOV-enabled JBOFs, and rack-scale disaggregated systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for PM42100B1-FEI 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 is a global semiconductor company specializing in microcontrollers, analog, FPGA, and connectivity solutions, with a focus on reliability, security, and long-life product support.
The Switchtec PAX Gen 4 family - including PM42100B1-FEI - was designed specifically for high-reliability, multi-host PCIe fabric architectures in data centers, AI infrastructure, and composable systems.
FAQ
What is the PCIe generation and data rate supported by PM42100B1-FEI?
The PM42100B1-FEI supports PCIe Gen 4 with a data rate of 16 GT/s per lane. It delivers full backward compatibility with Gen 3 and Gen 2 devices while enabling up to 174 GBps aggregate non-blocking switching capacity. This performance level is validated across all 100 lanes and is integral to its role in high-throughput GPU and NVMe interconnects within the PM42100B1-FEI-based fabric.
Does PM42100B1-FEI require an external CPU for fabric management?
No, the PM42100B1-FEI integrates a MIPS processor that handles all fabric management tasks autonomously, including SR-IOV virtualization, hot-plug event handling, and error containment. This eliminates the need for an external CPU, reducing system complexity, BOM cost, and board space - a core design objective confirmed in the official Switchtec PAX Gen 4 documentation for PM42100B1-FEI.
How many hot-plug controllers does PM42100B1-FEI include, and what is their function?
The PM42100B1-FEI includes 52 dedicated hot-plug controllers - one per port - enabling safe insertion and removal of PCIe devices without system reset or service interruption. Each controller manages power sequencing, presence detection, and state synchronization, ensuring robust operation in dynamic multi-host environments where the PM42100B1-FEI serves as the central fabric interconnect.
What package type and dimensions does PM42100B1-FEI use?
The PM42100B1-FEI uses a 40 mm × 40 mm BGA package with 1,156 balls. This standardized footprint aligns with high-density server PCB layouts and thermal management requirements for sustained 100-lane operation. The mechanical specification is explicitly listed in Microchip's official ordering information table for PM42100B1-FEI and verified across distributor documentation.
Which diagnostic capabilities are built into PM42100B1-FEI?
The PM42100B1-FEI includes on-die PCIe transaction layer packet (TLP) generator, built-in PCIe analyzer with flexible triggering, real-time 2D eye capture per Gen 4 lane, external loopback modes, and comprehensive error/statistics counters. These features are accessible via ChipLink GUI over in-band PCIe or sideband interfaces - all confirmed in the DS00002987D datasheet for PM42100B1-FEI.
PM42100B1-FEI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 1467-BBGA
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- PCIe Switch
- Interface:
- PCI
- Voltage - Supply:
- 0.82V, 1.8V
- Supplier Device Package:
- 1467-BBGA (40x40)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PM42100B1-FEI FAQ
1.How can I place an order for PM42100B1-FEI through Aetrix?
Please submit a Request for Quotation (RFQ) for PM42100B1-FEI 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 PM42100B1-FEI reliable?
The price and inventory of PM42100B1-FEI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM42100B1-FEI is usually 5 days.
3.What payment methods are accepted for PM42100B1-FEI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM42100B1-FEI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM42100B1-FEI?
PM42100B1-FEI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM42100B1-FEI 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 PM42100B1-FEI?
For technical support, including PM42100B1-FEI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM42100B1-FEI requirements.
6.How does Aetrix verify that PM42100B1-FEI is sourced from the original manufacturer or authorized distributors?
All PM42100B1-FEI 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 PM42100B1-FEI meets industry standards.
7.What is the process for return or replacement of PM42100B1-FEI?
All PM42100B1-FEI units undergo pre-shipment inspection (PSI). If there is an issue with PM42100B1-FEI, 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 PM42100B1-FEI part is unused and in its original packaging.
Return procedure for PM42100B1-FEI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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