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Diodes Incorporated PI3EQX32904ZREX
- Part No.:
- PI3EQX32904ZREX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 46-WFQFN Exposed Pad
- Datasheet:
-
PI3EQX32904ZREX.pdf
- Description:
- PCIE EQX W-QFN3063-46 T&R 3.5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
PI3EQX32904ZREX from Diodes Incorporated is a 4-channel, 32Gbps PCIe 5.0 ReDriver with linear equalization, CML I/Os (100Ω differential), independent per-channel configuration (equalization, swing, flat gain), and I²C programmability. It operates at 3.3V over -40°C to +85°C and supports PCIe 5.0, SAS4, and CXL protocols in high-speed server backplanes and AI accelerator interconnects.
For engineers reviewing the PI3EQX32904ZREX datasheet, PI3EQX32904ZREX pinout, PI3EQX32904ZREX application, or PI3EQX32904ZREX equivalent, key selection criteria include channel independence, 32Gbps per-lane throughput, CML input sensitivity with automatic receiver detect, and I²C-configurable equalization for lossy PCB traces or passive cables.
Technical Context
The PI3EQX32904ZREX implements four fully independent linear ReDriver channels, each with 3-bit programmable receive equalization, 2-bit flat gain control, and 2-bit output swing adjustment. Its transparent link-training behavior preserves PCIe 5.0 L0/L1/L2 state negotiation without protocol layer intervention.
It features adaptive power management triggered by input signal presence detection (PRSNT#) and conditional pull-up termination (50Ω/78kΩ/HIZ), enabling dynamic channel gating to reduce idle power in multi-lane systems while maintaining full 32Gbps serial link integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 32 Gbps per lane - supports full PCIe 5.0 x4 or CXL 2.0 x4 physical layer signaling. |
| Protocol Support | PCIe 5.0, SAS4, CXL - transparent to link training and rate negotiation; no protocol-specific firmware required. |
| I/O Interface | 100Ω differential CML - compatible with standard ASIC/CPU/Switch PHY outputs and enables direct connection to passive interconnects. |
| Supply Voltage | 3.3 V ±5% - single-rail operation simplifies power delivery design versus dual-supply redrivers. |
| Operating Temp | -40°C to +85°C - qualified for enterprise server, AI accelerator, and storage controller environments. |
| Control Interface | I²C (SCL/SDA) - enables runtime tuning of equalization, swing, and flat gain per channel without reset. |
| Channel Independence | Four isolated lanes - allows mixed-protocol routing (e.g., two PCIe + two CXL) on same device with independent parameter sets. |
Pinout & Package
Package: 46-pin W-QFN3063 (ZR), 3.0 mm × 6.3 mm, 0.4 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX0+ / RX0- | Differential CML input pair, Channel 0 | Accepts degraded 32Gbps signals; feeds linear equalizer stage with programmable boost. |
| A0TX+ / A0TX- | Differential CML output pair, Channel 0 | Drives downstream ASIC/fabric with configurable swing (–6 dB to +6 dB) and flat gain (0–12 dB). |
| PRSNT# | Input presence detection enable | Active-low signal indicating valid input; triggers adaptive power-down of inactive channels. |
| SCL / SDA | I²C bus interface | Allows real-time per-channel configuration without interrupting data flow or requiring device reset. |
| VCC / GND | Power and ground terminals | Multiple distributed VCC/GND pins minimize PDN impedance and ensure stable 3.3V supply under high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel linear equalization | 3-bit programmable boost compensates up to 20 dB insertion loss at 16 GHz, restoring eye opening for long PCB traces. |
| Independent output swing control | 2-bit setting adjusts differential output amplitude (±6 dB range) to match downstream receiver sensitivity and reduce EMI. |
| Automatic receiver detect | Hardware-level PRSNT# assertion per channel eliminates software polling and enables zero-latency power gating. |
| Rate- and coding-agnostic operation | Functions identically across PCIe 5.0 (128b/130b), CXL (same encoding), and SAS4 (8b/10b) without reconfiguration. |
| I²C-configurable flat gain | 2-bit flat gain (0–12 dB) corrects frequency-dependent loss without introducing phase distortion or jitter peaking. |
Applications
| AI Accelerator Interconnect | PCIe 5.0 Server Backplane |
|---|---|
Use Scenario: High-bandwidth communication between GPU/CPU and AI inference ASIC over 10+ cm FR4 traces with >15 dB loss at 16 GHz. IC Role / Device Role / Timing Role: Linear ReDriver restoring signal integrity pre-ASIC receiver; maintains sub-UI jitter compliance. Use Value: Enables reliable 32Gbps/lane operation without costly low-loss laminates or active cables. | Use Scenario: Signal extension across midplane connectors in dual-socket 2U servers supporting eight PCIe 5.0 x16 slots. IC Role / Device Role / Timing Role: Lane-by-lane redrive with independent equalization per slot to compensate connector skew and insertion loss variation. Use Value: Eliminates need for retimer-based solutions, reducing latency by ~100 ps per lane and avoiding protocol renegotiation delays. |
| CXL Memory Expansion Chassis | Enterprise NVMe-oF Switch Fabric |
Use Scenario: Extending CXL.mem links from host CPU to disaggregated memory modules over 30 cm flex PCBs with 25+ dB loss at Nyquist. IC Role / Device Role / Timing Role: Transparent redrive preserving CXL link training handshake and memory coherency timing. Use Value: Maintains sub-5 ns round-trip latency budget while supporting hot-plug memory expansion via passive interconnects. | Use Scenario: Aggregating 32x NVMe drives into a 4U switch chassis using PCIe 5.0 x8 upstream and x4 downstream ports per drive. IC Role / Device Role / Timing Role: Redriving all 32 lanes with per-lane gain tuning to equalize path length mismatches across dense backplane routing. Use Value: Achieves <0.5% bit error rate at 32Gbps without forward error correction overhead or link width reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed serial ReDriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TUSB1002A | 2-channel, USB3.2 Gen 2x2 (20Gbps) focused; lacks PCIe 5.0 equalization profile and CXL support. | Designed for USB-C docking stations, not PCIe/CXL infrastructure; no PRSNT# or adaptive power gating. | Select only for USB-native systems requiring lower bandwidth and simpler control. |
| Maxim MAX96754 | 4-channel GMSL2 serializer, not a redriver; requires parallel-to-serial conversion and adds protocol overhead. | Targeted at automotive camera links (not data center); incompatible with PCIe/CXL electrical specs and training sequences. | Not suitable for compute interconnect; use only in GMSL2 video transport applications. |
Compared with TI TUSB1002A and MAX96754, the PI3EQX32904ZREX uniquely delivers native 32Gbps PCIe 5.0/CXL transparency, per-lane adaptive power management, and I²C-tunable linear equalization-making it the only viable option for enterprise-scale, low-latency, multi-protocol redriving where protocol transparency and signal fidelity are non-negotiable.
Availability
PI3EQX32904ZREX is available at Aetrix Electronics and suitable for AI accelerator interconnects, PCIe 5.0 server backplanes, and CXL memory expansion chassis requiring stable component supply and guaranteed long-term availability.
Supply support for PI3EQX32904ZREX 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 enterprise and industrial markets.
The PI3EQX32904ZREX belongs to Diodes' ReDriver™ product line, engineered specifically for ultra-high-speed serial link extension in PCIe 5.0, CXL, and SAS4 infrastructure-prioritizing protocol transparency, low latency, and per-channel configurability.
FAQ
Does PI3EQX32904ZREX require external reference clocks or PLLs?
No. The PI3EQX32904ZREX is a linear ReDriver-not a retimer-so it does not recover or regenerate the clock. It operates transparently on the incoming data stream without requiring reference clocks, PLLs, or clock-data recovery circuitry. This eliminates added latency and jitter accumulation typical of retimer architectures.
Can PI3EQX32904ZREX be used in CXL 2.0 deployments?
Yes. The PI3EQX32904ZREX is explicitly validated for CXL 2.0 operation. Its rate- and coding-agnostic design supports CXL's 128b/130b encoding and maintains full link training transparency, enabling seamless integration in CXL memory pool and fabric-expander topologies without firmware modification.
What is the function of the PRSNT# pin?
The PRSNT# pin is an active-low input that signals valid differential input activity per channel. When asserted, it enables the corresponding channel's output driver and equalizer; when deasserted, the channel enters low-power squelch mode-reducing quiescent current by >70% without affecting adjacent lanes.
Is PI3EQX32904ZREX compliant with AEC-Q100 for automotive use?
No. The PI3EQX32904ZREX is specified for commercial/industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes Incorporated offers separate automotive-grade variants (e.g., PI3EQX32904AQREX) with PPAP support, IATF 16949 manufacturing, and extended reliability testing for automotive applications.
PI3EQX32904ZREX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 46-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Buffer, Multiplexer
- Applications:
- I2C, PCIe, SAS
- Input:
- CML
- Output:
- CML
- Data Rate (Max):
- 32Gbps
- Number of Channels:
- 4 x 2:1
- Delay Time:
- -
- Signal Conditioning:
- Input Equalization
- Capacitance - Input:
- -
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 46-WQFN (3x6.3)
PI3EQX32904ZREX FAQ
1.How can I place an order for PI3EQX32904ZREX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3EQX32904ZREX 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 PI3EQX32904ZREX reliable?
The price and inventory of PI3EQX32904ZREX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3EQX32904ZREX is usually 5 days.
3.What payment methods are accepted for PI3EQX32904ZREX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3EQX32904ZREX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3EQX32904ZREX?
PI3EQX32904ZREX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3EQX32904ZREX 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 PI3EQX32904ZREX?
For technical support, including PI3EQX32904ZREX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3EQX32904ZREX requirements.
6.How does Aetrix verify that PI3EQX32904ZREX is sourced from the original manufacturer or authorized distributors?
All PI3EQX32904ZREX 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 PI3EQX32904ZREX meets industry standards.
7.What is the process for return or replacement of PI3EQX32904ZREX?
All PI3EQX32904ZREX units undergo pre-shipment inspection (PSI). If there is an issue with PI3EQX32904ZREX, 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 PI3EQX32904ZREX part is unused and in its original packaging.
Return procedure for PI3EQX32904ZREX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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