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Diodes Incorporated PI3PCIE3212XUAEX
- Part No.:
- PI3PCIE3212XUAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Specialized
- Package:
- 18-XFQFN Exposed Pad
- Datasheet:
-
PI3PCIE3212XUAEX.pdf
- Description:
- IC INTFACE SPECIALIZED 18X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,055
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Product details
Overview
PI3PCIE3212XUAEX from Diodes Incorporated is a PCIe Gen3.0-compliant, 8.0 Gbps, 4-to-2 differential bidirectional Mux/DeMux switch in an 18-pin X2QFN (2×2 mm) package. It supports two independent differential lanes, delivers 8.1 GHz -3 dB bandwidth, maintains ≤10 ps bit-to-bit skew and ≤20 ps channel-to-channel skew, and operates across -40°C to +85°C for routing PCIe 3.0 signals between host and dual downstream ports.
For engineers reviewing the PI3PCIE3212XUAEX datasheet, PI3PCIE3212XUAEX pinout, PI3PCIE3212XUAEX application, or PI3PCIE3212XUAEX equivalent, key selection criteria include differential insertion loss (-1.7 dB @4 GHz), off-isolation (-21 dB @4 GHz), return loss (-13.5 dB @4 GHz), crosstalk (-32 dB @4 GHz), and single-enable 3.3 V operation with <0.2 mA supply current.
Technical Context
The PI3PCIE3212XUAEX implements a passive analog signal-routing architecture with no internal termination or equalization-relying on external 100 Ω differential impedance matching. Its SEL-controlled switching matrix routes either Port A→B or A→C while maintaining signal integrity via low-loss, symmetric trace paths and tightly matched differential pair layouts.
All 12 differential I/O pins (A0±, A1±, B0±, B1±, C0±, C1±) are fully bidirectional and support AC-coupled high-speed serial protocols including PCIe 3.0, DisplayPort 1.2, USB 3.0, SATA 3.0, SAS 2.0, XAUI, and RXAUI without protocol-specific configuration or firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signal Rate | 8.0 Gbps-fully compliant with PCIe Gen3.0 data rate requiring ≤10 ps bit-to-bit skew and ≤20 ps inter-lane skew. |
| -3 dB Bandwidth | 8.1 GHz-ensures minimal amplitude roll-off across full PCIe 3.0 Nyquist frequency (4 GHz). |
| Insertion Loss | -1.7 dB @ 4 GHz-meets PCIe 3.0 link budget requirements with margin for PCB trace loss. |
| Off Isolation | -21 dB @ 4 GHz-prevents crosstalk-induced jitter when unselected path is inactive. |
| Supply Voltage | 3.3 V ±10%-compatible with standard PCIe auxiliary power rails; draws only 0.2 mA typical active current. |
| Operating Temp | -40°C to +85°C-supports industrial-grade deployment in NBs, servers, and embedded compute platforms. |
| Package | 18-pin X2QFN (2×2 mm)-enables dense routing in space-constrained PCIe add-in cards and motherboard fanout zones. |
Pinout & Package
PI3PCIE3212XUAEX uses an 18-pin X2QFN (2×2 mm) package with exposed thermal pad. Pin numbering follows top-side view; all differential pairs are adjacent and symmetrically routed to minimize skew.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0+, A0− | Differential I/O, Channel 0, Port A | Primary upstream PCIe lane input; bidirectional, AC-coupled, 100 Ω differential impedance. |
| A1+, A1− | Differential I/O, Channel 1, Port A | Secondary upstream PCIe lane input; electrically identical to A0±, shares same SEL control. |
| B0+, B0− | Differential I/O, Channel 0, Port B | Downstream Lane 0 output when SEL = 0; routed directly with matched length to preserve phase alignment. |
| B1+, B1− | Differential I/O, Channel 1, Port B | Downstream Lane 1 output when SEL = 0; maintains ≤20 ps channel-to-channel skew vs. B0±. |
| C0+, C0− | Differential I/O, Channel 0, Port C | Alternate downstream Lane 0 output when SEL = 1; isolated from B-port paths via internal switch matrix. |
| C1+, C1− | Differential I/O, Channel 1, Port C | Alternate downstream Lane 1 output when SEL = 1; enables dynamic port selection without signal interruption. |
| SEL | Digital Input | Active-high select: logic 0 routes A→B, logic 1 routes A→C; TTL-compatible with 0–0.8 V low / 2–3.6 V high thresholds. |
| PD | Digital Input | Power-down enable: logic high disables all channels and reduces supply current to ≤40 µA; retains pin states. |
| VDD | Power Supply | 3.3 V ±10% analog supply; decoupling required at package edge per high-speed layout guidelines. |
| GND | Power Ground | Eight dedicated ground pins plus center thermal pad-mandatory for signal reference stability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| PCIe Gen3.0 compliance | Validated at 8.0 Gbps with ≤10 ps bit-to-bit skew and ≤20 ps channel-to-channel skew-meets PCI-SIG electrical spec for root complex and endpoint switching. |
| Low insertion loss | -1.7 dB @ 4 GHz ensures ≥75% signal amplitude retention after switch path-critical for maintaining BER <10⁻¹² over 20+ inch FR4 traces. |
| High off-isolation | -21 dB @ 4 GHz suppresses coupling between active and inactive paths-prevents deterministic jitter accumulation in multi-lane systems. |
| Bidirectional operation | No direction pin or biasing required-supports upstream/downstream traffic reversal without reconfiguration or timing recalibration. |
| Ultra-low power | 0.2 mA typical active current and ≤40 µA power-down current-enables always-on PCIe hot-plug detection without thermal penalty. |
Applications
| PCIe Lane Multiplexing | DisplayPort 1.2 Switching |
|---|---|
Use Scenario: A laptop motherboard routes a single PCIe Gen3 x2 uplink to either an M.2 SSD slot or a Thunderbolt 3 controller based on user configuration. IC Role / Device Role / Timing Role: Bidirectional 4-to-2 Mux/DeMux providing protocol-transparent lane selection with sub-30 ns enable/disable timing. Use Value: Eliminates need for dual PCIe controllers; preserves full 8.0 Gbps bandwidth and Gen3 timing margins on both paths. | Use Scenario: An all-in-one desktop PC switches a single DisplayPort 1.2 source between internal eDP panel and external DP monitor using hardware-selectable routing. IC Role / Device Role / Timing Role: High-fidelity differential signal router supporting 21.6 Gbps DP1.2 HBR2 data rate with <10 ps skew across all four lanes. Use Value: Maintains pixel-perfect video timing and eliminates display flicker or sync loss during hot-switch events. |
| USB 3.0 Host Sharing | SATA 3.0 Dual-Boot Selection |
Use Scenario: An industrial gateway shares one USB 3.0 host controller between a cellular modem module and a local storage dongle via firmware-controlled port selection. IC Role / Device Role / Timing Role: Low-latency 2:1 differential switch enabling <25 ns propagation delay and <10 ps intra-pair skew for SuperSpeed signaling. Use Value: Supports seamless failover without USB enumeration restart; meets USB-IF eye diagram mask at 5 Gbps. | Use Scenario: A ruggedized NAS platform selects between two SATA 3.0 drives-one for OS boot, one for data storage-using a hardware strap-driven switch. IC Role / Device Role / Timing Role: Gen3-compliant signal router delivering -1.7 dB insertion loss and -13.5 dB return loss at 3 GHz to meet SATA 6 Gbps impedance requirements. Use Value: Enables cold-swap drive selection without SATA link renegotiation or PHY reset delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe Gen3.0 signal switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PI3DBS16412ZLCEX | 4:1 differential Mux/DeMux with 12 Gbps capability; higher insertion loss (-2.3 dB @4 GHz); requires 1.8 V core + 3.3 V I/O supplies. | Supports PCIe Gen4.0 but lacks integrated PD pin; needs external power sequencing for low-power states. | Select when upgrading to Gen4.0 infrastructure or needing 4-input flexibility; avoid if strict Gen3.0 + ultra-low power is required. |
| TS3USB30EVM | Single-lane 2:1 USB 3.0 switch; not PCIe-certified; lower bandwidth (5.5 GHz); higher crosstalk (-25 dB @4 GHz). | Limited to USB 3.0 and DisplayPort 1.1; unsuitable for PCIe 3.0 due to insufficient off-isolation and skew performance. | Acceptable only for cost-sensitive USB-only designs; reject for any PCIe or multi-protocol use case requiring Gen3.0 compliance. |
Compared with PI3DBS16412ZLCEX and TS3USB30EVM, PI3PCIE3212XUAEX uniquely balances PCIe Gen3.0 certification, 8.1 GHz bandwidth, -1.7 dB insertion loss, integrated power-down, and single 3.3 V supply-making it optimal for space-constrained, multi-protocol, industrial-grade PCIe switching where signal fidelity and power efficiency are co-prioritized.
Availability
PI3PCIE3212XUAEX is available at Aetrix Electronics and suitable for notebook PCs, server backplanes, embedded GPU modules, and industrial PCIe expansion systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PI3PCIE3212XUAEX 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance signal integrity, power management, and interface solutions for computing, communications, and industrial markets.
The PI3PCIE3212 belongs to Diodes' Pericom® high-speed signal-switching product line, engineered specifically for PCIe Gen3.0, USB 3.x, and DisplayPort 1.2/1.4 applications demanding sub-10 ps skew, >8 GHz bandwidth, and ultra-low insertion loss in miniature packages.
FAQ
What is the maximum supported data rate and protocol compliance of PI3PCIE3212XUAEX?
PI3PCIE3212XUAEX supports 8.0 Gbps data rate and is fully compliant with PCI Express Gen3.0 specifications. It has been characterized for differential insertion loss (-1.7 dB @4 GHz), return loss (-13.5 dB @4 GHz), and bit-to-bit skew (≤10 ps), meeting all PCI-SIG electrical requirements for root complex and endpoint switching applications without equalization or retiming.
Does PI3PCIE3212XUAEX require external termination resistors?
No. PI3PCIE3212XUAEX is a passive analog switch with no internal termination; external 100 Ω differential termination must be placed at the receiver end of each path (B0/B1 or C0/C1). The device itself presents near-100 Ω differential impedance when enabled, and proper PCB layout-including controlled-impedance 100 Ω differential traces-is mandatory to maintain signal integrity.
How does the SEL and PD pin interaction affect switching behavior?
SEL controls signal routing: logic low connects A→B, logic high connects A→C. PD is independent-when high, all channels enter high-impedance state regardless of SEL state, reducing supply current to ≤40 µA. Both pins accept 3.3 V CMOS logic levels; no sequencing is required between SEL and PD transitions, and switching occurs within 30 ns (tPZH/tPZL) after SEL change.
Can PI3PCIE3212XUAEX be used with protocols other than PCIe 3.0?
Yes. Its 8.1 GHz bandwidth and low skew/loss characteristics support multiple high-speed serial protocols including DisplayPort 1.2 (21.6 Gbps), USB 3.0 (5 Gbps), SATA 3.0 (6 Gbps), SAS 2.0 (6 Gbps), XAUI (3.125 Gbps), and RXAUI (3.125 Gbps). No configuration or firmware is needed-the device operates transparently across protocols as long as differential voltage and common-mode ranges remain within specification.
PI3PCIE3212XUAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- PCI Express® (PCIe)
- Package/Case:
- 18-XFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- PCIe
- Interface:
- PCI Express
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 18-X2QFN (2x2)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PI3PCIE3212XUAEX FAQ
1.How can I place an order for PI3PCIE3212XUAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3PCIE3212XUAEX 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 PI3PCIE3212XUAEX reliable?
The price and inventory of PI3PCIE3212XUAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3PCIE3212XUAEX is usually 5 days.
3.What payment methods are accepted for PI3PCIE3212XUAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3PCIE3212XUAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3PCIE3212XUAEX?
PI3PCIE3212XUAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3PCIE3212XUAEX 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 PI3PCIE3212XUAEX?
For technical support, including PI3PCIE3212XUAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3PCIE3212XUAEX requirements.
6.How does Aetrix verify that PI3PCIE3212XUAEX is sourced from the original manufacturer or authorized distributors?
All PI3PCIE3212XUAEX 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 PI3PCIE3212XUAEX meets industry standards.
7.What is the process for return or replacement of PI3PCIE3212XUAEX?
All PI3PCIE3212XUAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3PCIE3212XUAEX, 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 PI3PCIE3212XUAEX part is unused and in its original packaging.
Return procedure for PI3PCIE3212XUAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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