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Diodes Incorporated PI3PCIE3212ZBEX
- Part No.:
- PI3PCIE3212ZBEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
PI3PCIE3212ZBEX.pdf
- Description:
- IC MUX/DEMUX 2:1 3.3V 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:19,736
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Product details
Overview
PI3PCIE3212ZBEX from Diodes Incorporated is a PCIe Gen3.0-compliant, 8.0 Gbps, 4-to-2 differential bidirectional Mux/DeMux switch in a 20-contact TQFN (2.5 × 4.5 mm) package. It provides low bit-to-bit skew (≤10 ps), 8.1 GHz bandwidth, and supports signal routing between two PCIe lanes with -1.7 dB insertion loss at 4 GHz. It is deployed in NBs, servers, and embedded systems requiring high-fidelity PCIe 3.0 lane switching.
For engineers reviewing the PI3PCIE3212ZBEX datasheet, PI3PCIE3212ZBEX pinout, PI3PCIE3212ZBEX application, or PI3PCIE3212ZBEX equivalent, key selection criteria include differential channel count (2-channel), 3.3 V supply compatibility, industrial temperature range (-40°C to +85°C), PCIe 3.0 signal integrity metrics (crosstalk ≤ -32 dB @4 GHz), and dual-package availability (TQFN/ZB and X2QFN/XUA).
Technical Context
The PI3PCIE3212ZBEX implements a single-pole double-throw (SPDT) differential switch architecture for PCIe 3.0 lanes, supporting bidirectional signal flow across three differential ports (A, B, C) with SEL-controlled path selection (A→B or A→C). Its design targets minimal signal degradation via matched trace routing, low channel-to-channel skew (≤20 ps), and integrated 50 Ω impedance matching.
It operates exclusively from a 3.3 V ±10% supply, draws only 0.2 mA typical active current, and features a dedicated PD pin enabling full power-down mode (IDD_PD ≤ 40 µA). The device maintains signal fidelity up to 8.1 GHz bandwidth while meeting PCIe Gen3.0 eye diagram compliance at 8.0 Gbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signal Rate | 8.0 Gbps - Full PCIe Gen3.0 data rate support without retiming or equalization. |
| 3dB Bandwidth | 8.1 GHz - Ensures minimal high-frequency attenuation for PCIe 3.0 NRZ eye opening. |
| Insertion Loss | -1.7 dB @ 4 GHz - Meets PCIe 3.0 channel loss budget for ≤10-inch FR4 traces. |
| Bit-to-Bit Skew | ≤10 ps - Maintains differential pair timing alignment critical for jitter-sensitive receivers. |
| Channel-to-Channel Skew | ≤20 ps - Enables simultaneous switching of multiple PCIe lanes without inter-lane timing violation. |
| Crosstalk | -32 dB @ 4 GHz - Prevents coupling-induced jitter between adjacent switched lanes. |
| Supply Voltage | 3.3 V ±10% - Compatible with standard PCIe slot and motherboard I/O rail voltage. |
Pinout & Package
Package: 20-contact TQFN (2.5 × 4.5 mm), RoHS-compliant, lead-free, green construction with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0+, A0− | Differential I/O, Port A Channel 0 | Primary input/output port for first PCIe lane; bidirectional, 100 Ω differential impedance. |
| A1+, A1− | Differential I/O, Port A Channel 1 | Secondary input/output port for second PCIe lane; electrically isolated from A0 pair. |
| B0+, B0− / B1+, B1− | Differential I/O, Port B Channels 0 & 1 | First output destination port; selected when SEL = LOW; shares common ground reference. |
| C0+, C0− / C1+, C1− | Differential I/O, Port C Channels 0 & 1 | Second output destination port; selected when SEL = HIGH; independent routing path. |
| SEL | Digital Control Input | Active-HIGH logic selects A→C path; LOW selects A→B; TTL-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V). |
| PD | Power-Down Enable Input | Active-HIGH disables all channels and reduces supply current to ≤40 µA; preserves signal isolation. |
| VDD | Positive Supply | 3.3 V ±10% analog/digital supply; decoupling required per datasheet layout guidelines. |
| GND | Power Ground | Multiple pins (including center thermal pad) ensure low-inductance return path for high-speed signals. |
Key Features
| Feature | Design Value |
|---|---|
| PCIe Gen3.0 Compliance | Validated 8.0 Gbps operation with <10 ps bit-to-bit skew and -1.7 dB insertion loss at 4 GHz. |
| Dual-Port Differential Switching | Supports simultaneous routing of two independent PCIe lanes (A0/A1 → B0/B1 or C0/C1) under single SEL control. |
| Low-Power Operation | 0.2 mA typical active supply current enables use in thermally constrained server backplanes and mobile NB designs. |
| High Noise Immunity | -32 dB crosstalk and -21 dB off-isolation at 4 GHz prevent interference between active and inactive paths. |
| Industrial Temperature Range | Operates reliably from -40°C to +85°C ambient, suitable for uncooled server chassis and industrial edge compute. |
Applications
| PCIe Lane Multiplexing | Multi-Host GPU Switching |
|---|---|
|
Use Scenario: Dynamically assigning a single PCIe x16 slot to one of two downstream devices (e.g., GPU or NVMe SSD) in a compact workstation. IC Role / Device Role / Timing Role: Bidirectional 2:1 Mux/DeMux managing differential lane continuity and timing alignment during hot-switch events. Use Value: Eliminates need for discrete PCIe switches or FPGA-based routing, reducing BOM cost and PCB layer count while preserving Gen3.0 signal integrity. |
Use Scenario: Enabling dual-CPU systems to share a single high-bandwidth accelerator (e.g., AI inference card) without physical reconfiguration. IC Role / Device Role / Timing Role: Low-skew, low-loss signal path selector ensuring sub-20 ps channel-to-channel skew across CPU-to-device links. Use Value: Maintains PCIe 3.0 link training success rate >99.9% across both host paths, avoiding retraining delays and system-level timeouts. |
| Embedded Storage Arbitration | Test Equipment Signal Routing |
|
Use Scenario: Selecting between two SATA3.0 or SAS2.0 storage controllers connected to a shared backplane in ruggedized industrial storage enclosures. IC Role / Device Role / Timing Role: High-isolation differential switch providing -21 dB off-isolation to prevent signal bleed during arbitration. Use Value: Enables deterministic failover within <30 ns enable/disable time, meeting MIL-STD-810G shock/vibration test requirements. |
Use Scenario: Automated test fixtures routing PCIe 3.0 signals between DUT and high-speed protocol analyzers or bit-error-rate testers. IC Role / Device Role / Timing Role: Precision-matched differential path with 8.1 GHz bandwidth supporting full-rate eye diagram capture. Use Value: Delivers measurement repeatability ±0.5 dB insertion loss variation across 10,000+ thermal cycles in production ATE environments. |
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 |
|---|---|---|---|
| TS3USB30E by Texas Instruments | Single-channel, 5.0 Gbps USB 3.0 switch; lacks PCIe Gen3.0 validation, lower bandwidth (5.5 GHz), higher IL (-2.3 dB @4 GHz). | Designed for USB 3.0, not PCIe; unsuitable for 8.0 Gbps lane routing due to insufficient bandwidth and skew specs. | Select only if routing USB 3.0 or SATA2.0; not a drop-in replacement for PCIe Gen3.0. |
| PI3DBS16412 by Diodes Incorporated | 4-channel, 16:4 PCIe Gen3.0 fanout switch; larger 40-pin TQFN, higher IDD (1.2 mA), no PD pin. | Used for PCIe lane distribution (1→4), not multiplexing; incompatible truth table and pinout. | Choose for fanout applications; PI3PCIE3212ZBEX remains optimal for 2:1 Mux/DeMux with power-down capability. |
Compared with TS3USB30E and PI3DBS16412, the PI3PCIE3212ZBEX uniquely combines PCIe Gen3.0-validated 8.0 Gbps performance, ultra-low skew (<10 ps), integrated power-down, and compact 20-pin TQFN-making it the only fit for space-constrained, low-power, dual-lane PCIe multiplexing where signal integrity and thermal management are critical.
Availability
PI3PCIE3212ZBEX is available at Aetrix Electronics and suitable for NBs, servers, and industrial embedded systems requiring stable component supply, PCIe Gen3.0 signal routing, and long-term lifecycle assurance.
Supply support for PI3PCIE3212ZBEX 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 ICs, specializing in high-performance analog, logic, and interface solutions for computing, communications, and industrial markets.
The PI3PCIE3212ZBEX belongs to Diodes' Pericom® high-speed signal integrity product line, engineered specifically for PCIe Gen3.0, USB3.0, and DP1.2 switching in space- and power-constrained platforms.
FAQ
Is PI3PCIE3212ZBEX compatible with PCIe Gen4.0 signals?
No. The PI3PCIE3212ZBEX is specified and validated only for PCIe Gen3.0 (8.0 Gbps) operation. Its 8.1 GHz bandwidth and -1.7 dB insertion loss at 4 GHz do not meet Gen4.0's 16 Gbps requirements, which demand ≥16 GHz bandwidth and tighter loss/skew margins. Using it in Gen4.0 links will cause link training failure or degraded BER.
Can PI3PCIE3212ZBEX operate with 1.8 V or 2.5 V supplies?
No. The device requires a nominal 3.3 V ±10% supply (3.0–3.6 V) as defined in its Recommended Operating Conditions. VDD outside this range violates absolute maximum ratings and may cause latch-up, excessive leakage, or permanent damage. No internal voltage regulation or level-shifting is provided.
What is the function of the center thermal pad on the 20-TQFN package?
The exposed center pad is electrically connected to GND and serves as the primary thermal and electrical ground return path. It must be soldered to a solid copper thermal pad on the PCB with ≥6 thermal vias to maintain junction temperature ≤125°C under full 0.5 W power dissipation and ensure signal integrity via low-inductance grounding.
Does PI3PCIE3212ZBEX support hot-plug or hot-swap operation?
Yes-when used with proper system-level hot-plug controller circuitry. The device itself has no built-in hot-plug detection, but its bidirectional operation, fast enable/disable times (tPZH/tPLZ ≤30 ns), and robust ESD rating (2 kV HBM) allow safe insertion/removal in powered systems when coordinated with upstream PCIe root complex hot-plug signaling.
PI3PCIE3212ZBEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- PCI Express® (PCIe)
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- PCI Express®
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Switch Circuit:
- -
- Number of Channels:
- 2
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 8.1GHz
- Features:
- Bi-Directional, SATA, USB 3.0
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (2.5x4.5)
PI3PCIE3212ZBEX FAQ
1.How can I place an order for PI3PCIE3212ZBEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3PCIE3212ZBEX 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 PI3PCIE3212ZBEX reliable?
The price and inventory of PI3PCIE3212ZBEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3PCIE3212ZBEX is usually 5 days.
3.What payment methods are accepted for PI3PCIE3212ZBEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3PCIE3212ZBEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3PCIE3212ZBEX?
PI3PCIE3212ZBEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3PCIE3212ZBEX 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 PI3PCIE3212ZBEX?
For technical support, including PI3PCIE3212ZBEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3PCIE3212ZBEX requirements.
6.How does Aetrix verify that PI3PCIE3212ZBEX is sourced from the original manufacturer or authorized distributors?
All PI3PCIE3212ZBEX 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 PI3PCIE3212ZBEX meets industry standards.
7.What is the process for return or replacement of PI3PCIE3212ZBEX?
All PI3PCIE3212ZBEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3PCIE3212ZBEX, 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 PI3PCIE3212ZBEX part is unused and in its original packaging.
Return procedure for PI3PCIE3212ZBEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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