PI7C9X2G304SLQ - 3-Port 4-Lane PCIe 2.0 Switch | Diodes Inc
MPN: PI7C9X2G304SLQ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.1 | $81.00 |
| 100 | $7.25 | $725.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $5.95 | $5,950.00 |
PI7C9X2G304SLQ Overview
A PCIe packet switch is a fabric device that expands a single upstream PCI Express link into multiple downstream links, allowing one root-complex port to communicate with several endpoints simultaneously. In the system hierarchy, it sits between the root complex and endpoints, providing aggregation, fan-out, and peer-to-peer packet routing while maintaining full PCIe protocol compliance through hardware-based switching.
Key features include PCI Express 2.0 (Gen2) link rates of 5.0 GT/s per lane with backward compatibility to Gen1 2.5 GT/s, a slimline low-cost design targeted at space- and budget-sensitive platforms, and automotive AEC-Q100 qualification distinguishing the SLQ suffix from the standard PI7C9X2G304SL. Low-power operation and green lead-free packaging further support harsh-environment and consumer-electronics deployments alike.
Architecturally, the device implements a store-and-forward/cut-through packet switch with integrated serdes, buffering, and PCIe 2.0 data-link and transaction-layer processing, enabling peer-to-peer transfers between downstream endpoints without host intervention. This offloads root-complex resources and reduces latency in multi-device topologies.
Typical applications include Wi-Fi routers and gateways aggregating multiple radio or WAN endpoints, embedded industrial systems, storage controllers and HBAs, combo cards, and printers, as stated on the Diodes Incorporated product page. The automotive qualification variant suits in-vehicle infotainment, telematics, and ADAS connectivity expansion.
When designing with this switch, verify thermal performance with the chosen airflow, and confirm the downstream link-width partitioning matches the planned endpoint topology before board layout.
This page synthesizes distributor pricing context, drop-in alternatives, and practical design guidance not found in the manufacturer product brief.
Drop-in alternatives for PI7C9X2G304SLQ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PI7C9X2G304SLBFDEX
✅ Drop-In📋 Reference alternative (not in catalog)
PI7C9X2G304SLBFMEX
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PI7C9X2G304SLBQFDEX
✅ Drop-In📋 Reference alternative (not in catalog)
PI7C9X2G304SL
✅ Drop-In📋 Reference alternative (not in catalog)
PI7C9X2G304SLQ Maximum Ratings & Electrical Characteristics
| Product Type | PCI Express 2.0 Packet Switch |
| Port Configuration | 3-Port, 4-Lane |
| PCIe Generation | Gen2 (5.0 GT/s), backward compatible to Gen1 (2.5 GT/s) |
| Series | SlimLine Packet Switch |
| Automotive Qualification | AEC-Q100 qualified |
| Package | 128-LQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Applications | Embedded system, Wi-Fi router/gateway, Printer, Storage, Combo card, HBA |
| Lead Content | Lead (Pb)-free |
| Green Compliance | Green system requirements |
| Data Rate per Lane | 5.0 GT/s (Gen2) |
PI7C9X2G304SLQ 128-lqfp (14x14 mm) Pin Configuration Guide
Pin configuration for PI7C9X2G304SLQ (128-lqfp (14x14 mm) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for PI7C9X2G304SLQ.
Refer to the datasheet for full pin configuration.
Typical Applications
PI7C9X2G304SLQ is suitable for 6 applications: Wi-Fi Router and Gateway, Automotive Infotainment and Telematics, Embedded Industrial Systems, Storage Controllers and HBAs, Printer and Office Equipment, Combo Cards and Add-in Adapters.
Wi-Fi Router and Gateway
In Wi-Fi routers and gateways the PI7C9X2G304SLQ aggregates multiple endpoints, such as dual-band Wi-Fi radio modules plus a WAN or modem interface, behind a single host root-complex port. Its 3-port, 4-lane PCIe 2.0 fabric delivers 5.0 GT/s per lane, enough bandwidth for concurrent 802.11ac-class radios without saturating the upstream link. The slimline, low-power design suits fanless router enclosures where thermal budget is tight, and the 128-LQFP (14x14 mm) footprint keeps PCB area small. Peer-to-peer switching between downstream radios offloads the host CPU from inter-radio traffic.
Recommended
Automotive Infotainment and Telematics
The PI7C9X2G304SLQ is AEC-Q100 qualified specifically for automotive deployments, making it suitable for fan-out of a single PCIe root port to multiple in-vehicle endpoints such as telematics modems, Wi-Fi/BT combo modules, and display or camera interfaces in infotainment head units. PCIe 2.0 at 5.0 GT/s per lane provides adequate throughput for multi-camera and connectivity aggregation while the low-power design eases thermal constraints in enclosed dash assemblies. Selecting the SLQ ordering suffix ensures automotive compliance documentation and manufacturing traceability that commercial suffixes cannot provide.
Recommended
Embedded Industrial Systems
Industrial embedded controllers use the PI7C9X2G304SLQ to expand a host processor's single PCIe port into multiple endpoint connections for FPGA co-processors, network interface devices, or high-speed data acquisition cards. The PCIe 2.0 4-lane configuration provides deterministic low-latency switching while the 128-LQFP package supports conventional wave-reflow SMT assembly lines common in industrial manufacturing. Low standby power supports always-on monitoring nodes, and the green lead-free construction aligns with RoHS-driven industrial environmental mandates across the supply chain.
Recommended
Storage Controllers and HBAs
Storage systems and host bus adapters (HBAs) employ the PI7C9X2G304SLQ to fan out a single host PCIe link to multiple SSD or SATA controller endpoints. The switch's packet-routing architecture permits peer-to-peer DMA transfers between endpoints, bypassing host memory and reducing effective latency in mirrored or striped storage topologies. At PCIe 2.0 Gen2 rates, each lane sustains roughly 500 MB/s of raw bandwidth, and 4 lanes of upstream aggregation keep multi-drive configurations responsive in compact NAS and combo-card form factors using the slimline 14x14 mm LQFP footprint.
Recommended
Printer and Office Equipment
Networked printers and multifunction office equipment use the PI7C9X2G304SLQ to connect one host print-engine controller to several PCIe endpoints such as Wi-Fi modules, gigabit Ethernet controllers, and scan-interface devices. The cost-effective slimline architecture keeps BOM cost low in high-volume consumer office hardware, while 5.0 GT/s Gen2 lanes provide headroom for concurrent network and imaging data streams. The low-power profile suits duty-cycle-heavy office environments, and the standard 128-LQFP (14x14 mm) package integrates smoothly into high-volume SMT production.
Recommended
Combo Cards and Add-in Adapters
Combo cards combining multiple radio or wired interfaces on a single add-in board rely on the PI7C9X2G304SLQ to present a single upstream PCIe link to the host while exposing independent downstream links to each radio or controller. This removes the need for multiple host slots or port splitters. The 4-lane upstream can be partitioned across downstream endpoints per board topology, and the compact 14x14 mm LQFP fits half-height or M.2-adjacent card layouts. Lead-free green packaging simplifies worldwide regulatory certification for globally shipped adapter products.
Recommended
Recommended Products Summary
Engineering reference data for PI7C9X2G304SLQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PI7C9X2G304SLBFDEX | PI7C9X2G304SLBQFDEX | PI7C9X2G304SL |
|---|---|---|---|---|
| Package | 128-LQFP (14x14 mm) | 128-LQFP (14x14 mm) - same | 128-LQFP (14x14 mm) - same | 128-LQFP (14x14 mm) - same |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| PCIe Generation | Gen2 (5.0 GT/s) | Gen2 (5.0 GT/s) | Gen2 (5.0 GT/s) | Gen2 (5.0 GT/s) |
| Port / Lane Configuration | 3 ports / 4 lanes | 3 ports / 4 lanes | 3 ports / 4 lanes | 3 ports / 4 lanes |
| Lead-Free / Green | Yes (Pb-free, green) | Yes (Pb-free) | Yes (Pb-free) | Yes (Pb-free, green) |
Key Differentiators
- AEC-Q100 automotive qualification (vs PI7C9X2G304SL)
- Identical footprint enables commercial-to-automotive reuse (vs PI7C9X2G304SLBFDEX)
- Slimline low-power architecture (vs Larger multi-port PCIe Gen2 switches)
Design Notes
Route the four PCIe 2.0 lanes as 100-ohm differential pairs with length matching within 5 mils intra-pair and within 25 mils inter-pair for 5.0 GT/s operation. Keep lane traces away from switching-regulator nodes and clock lines by at least 3x trace width. Reference each differential pair to an unbroken ground plane; avoid crossing plane splits under the 128-LQFP breakout region. Use reference-plane stitching vias whenever a lane changes layers.
Place a 100 nF ceramic decoupling capacitor within 2 mm of each supply pin of the LQFP, plus bulk 10 uF capacitance per supply rail near the device. The product description targets low-power operation, but confirm per-rail current from the manufacturer datasheet before sizing regulators. Sequence supplies per the datasheet power-up order to avoid latch-up on the PCIe receiver inputs, and hold the PERST# pin asserted until all rails are stable.
Do not mix automotive and commercial suffixes interchangeably: only the PI7C9X2G304SLQ is AEC-Q100 qualified, so commercial PI7C9X2G304SL stock cannot substitute in automotive builds without qualification review. Confirm lane-width partitioning straps before layout, since incorrect configuration straps produce a functional board with degraded topology. Finally, verify the exact ordering suffix ordering code, reel versus tray, when releasing production BOMs to avoid lot-level qualification gaps.
Compliance Information
Per Diodes Incorporated product page, the PI7C9X2G304SLQ is AEC-Q100 qualified and designed to meet lead (Pb)-free and green system requirements. REACH and halogen-free status not stated in provided data.
