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Diodes Incorporated PI3EQX16612ZLDEX
- Part No.:
- PI3EQX16612ZLDEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
PI3EQX16612ZLDEX.pdf
- Description:
- PCIE EQX REDRIVER W-QFN3060-40
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
PI3EQX16612ZLDEX from Diodes Incorporated is a 16Gbps, 4-channel PCIe DeMux ReDriver IC designed for signal integrity restoration in high-speed serial links between protocol ASICs and switch fabrics or extended PCB traces. It supports PCIe Gen 1–4 compliance, provides pin-controlled linear equalization (EQ1–EQ3), adjustable output swing (SFA/SFB), flat gain, and operates at 3.3V over 0°C to 70°C.
For engineers reviewing the PI3EQX16612ZLDEX datasheet, PI3EQX16612ZLDEX pinout, PI3EQX16612ZLDEX application, or PI3EQX16612ZLDEX equivalent, key selection criteria include its 1:2 DeMux topology, CML-compatible 100Ω differential I/Os, automatic receiver detect per channel, adaptive power management, and transparent link training behavior in PCIe Gen 4 systems.
Technical Context
The PI3EQX16612ZLDEX implements a linear, rate-agnostic ReDriver architecture with four independent channels, each featuring a 100Ω differential CML input and dual-output paths (A/TX and B/TX) enabling 1-to-2 DeMux functionality. Its equalization is implemented via analog linear EQ stages (EQ1/EQ2/EQ3), not decision-feedback, preserving signal transparency during PCIe link training.
Each channel includes RXDET-based squelch control, PRSNT# presence detection, and FG/SW/EQ logic pins for static configuration of swing, flat gain, and equalization strength. Power management adapts bias current based on input signal presence, reducing quiescent power without compromising 16Gbps eye opening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 16 Gbps per channel - supports full PCIe Gen 4 x1 lane signaling without retiming or protocol awareness. |
| I/O Interface | 100Ω differential CML - matches standard PCIe physical layer impedance and voltage swing requirements. |
| Topology | 1:2 DeMux - routes one high-speed input to two independent output paths (e.g., A0TX/B0TX) per channel. |
| Supply Voltage | 3.3 V ±5% - compatible with standard PCIe auxiliary and main rail supplies; no separate low-voltage bias required. |
| Operating Temp | 0°C to 70°C - validated for commercial motherboard and workstation environments, not extended industrial range. |
| Equalization | Pin-selectable linear EQ (EQ1/EQ2/EQ3) - adjusts pre-emphasis boost at specific frequencies to compensate for channel loss up to ~15 dB at 8 GHz. |
| Power Management | Per-channel RXDET-driven squelch - disables output drivers when input signal falls below detection threshold, cutting dynamic power by >60% per idle channel. |
Pinout & Package
Package: ZLD40 (3 mm × 6 mm, 0.4 mm pitch, TQFN-40, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX0+/− | Differential data input Channel 0 | Accepts 100Ω CML input; triggers RXDET0 and enables A0TX/B0TX outputs when valid signal detected. |
| A0TX+/−, B0TX+/− | Differential data outputs Channel 0 | Two independent 100Ω CML outputs driven from RX0; supports 1:2 fanout without signal regeneration delay. |
| EQ1, EQ2, EQ3 | Equalization control inputs | Binary-encoded pins selecting one of eight linear EQ profiles; sets frequency-domain boost shape for loss compensation. |
| SFA, SFB | Output swing control inputs | Two-pin encoding selects nominal differential output swing: 400 mV, 600 mV, 800 mV, or 1000 mV. |
| FG | Flat gain enable | Activates fixed-gain amplification stage to offset insertion loss without altering EQ response shape. |
| RXDET0#, PRSNT# | Channel 0 receiver detect / presence | Open-drain outputs indicating valid input signal presence and physical connector insertion status. |
Key Features
| Feature | Design Value |
|---|---|
| PCIe Gen 1–4 compliance | Fully transparent to link training and LTSSM state machine; no firmware or register programming required. |
| Per-channel adaptive power control | Reduces total supply current by ≥45% when two or more channels are idle, critical for mobile workstation thermal budgets. |
| Pin-strapped configuration | Eliminates I²C/SMBus interface and external EEPROM; simplifies layout and reduces BOM count in space-constrained motherboards. |
| Linear equalization architecture | Preserves jitter transfer function and avoids decision-directed artifacts, enabling use in re-timer-adjacent positions without added BER penalty. |
| 100Ω CML I/O matching | Direct interface to Intel/AMD PCIe root complexes and switches without AC-coupling or termination resistor redesign. |
Applications
| High-End Motherboard Expansion | Workstation PCIe Slot Extension |
|---|---|
Use Scenario: Routing PCIe Gen 4 x4 signals from CPU socket to multiple M.2 slots across 8-layer PCB with >12″ trace length. IC Role / Device Role / Timing Role: DeMux ReDriver restoring signal integrity before splitting into dual M.2 lanes; maintains eye height >12 mV at receiver after 24 dB channel loss. Use Value: Enables reliable Gen 4 negotiation without requiring expensive backplane-grade materials or additional retimers. | Use Scenario: Extending PCIe Gen 4 x16 graphics slot to remote GPU enclosure via passive copper cable. IC Role / Device Role / Timing Role: Channel-specific equalization compensates for cable frequency roll-off; squelch disables unused lanes to reduce EMI and power draw. Use Value: Achieves stable 16 Gbps link over 30 cm 30 AWG twinax cable without active equalization on host or device side. |
| Server Backplane Signal Splitting | AI Accelerator Interconnect |
Use Scenario: Fanout from single PCIe Gen 4 upstream port to four downstream NVMe controllers on modular storage blade. IC Role / Device Role / Timing Role: 1:2 DeMux per channel allows flexible routing to dual-controller pairs while maintaining independent link training per path. Use Value: Eliminates need for PCIe switch IC in cost-sensitive storage modules; reduces latency by avoiding packet buffering and arbitration. | Use Scenario: Interfacing FPGA-based AI accelerator card with host CPU via PCIe Gen 4 x8, where board layout forces asymmetric trace lengths. IC Role / Device Role / Timing Role: Per-channel EQ tuning corrects inter-pair skew and loss mismatch between lanes, ensuring uniform eye opening across all eight lanes. Use Value: Prevents lane dropout during training and sustains full x8 bandwidth under thermal stress without firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe DeMux ReDriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TUSB1042IRNQT | USB 3.2 Gen 2x2 focused; lacks PCIe Gen 4 EQ tuning granularity and 1:2 DeMux capability. | Designed for USB-C docking, not PCIe signal extension; no PRSNT#/RXDET support for hot-plug PCIe devices. | Select only if USB-C alternate mode is primary requirement and PCIe extension is secondary. |
| Maxim MAX96752GTJ+T | GMSL2 serializer; operates at 3.125 Gbps, not 16 Gbps; uses embedded clock, not CML. | Targeted at automotive camera links, not high-speed compute interconnect; incompatible I/O standards and protocol transparency. | Not suitable for PCIe Gen 4; only consider for GMSL2 video transport in ADAS systems. |
Compared with TI TUSB1042IRNQT and MAX96752GTJ+T, the PI3EQX16612ZLDEX uniquely delivers PCIe Gen 4–compliant 16Gbps 1:2 DeMux operation with pin-strapped EQ/swing control and per-channel squelch-enabling motherboard-level signal fanout without protocol stack dependency or external configuration.
Availability
PI3EQX16612ZLDEX is available at Aetrix Electronics and suitable for high-end motherboard expansion, workstation PCIe slot extension, server backplane signal splitting, and AI accelerator interconnect requiring stable component supply and RoHS 3-compliant packaging.
Supply support for PI3EQX16612ZLDEX 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 integrated circuits, specializing in high-performance analog, logic, and connectivity solutions for computing, industrial, and consumer markets.
The PI3EQX16612 product line targets high-speed serial interface signal conditioning for PCIe Gen 4 platforms, emphasizing low-latency, protocol-transparent redriving with minimal design-in overhead.
FAQ
Does PI3EQX16612ZLDEX require I²C configuration or firmware loading?
No. The PI3EQX16612ZLDEX uses only pin-strapped controls (EQ1–EQ3, SFA/SFB, FG) for equalization, swing, and flat gain settings. It contains no internal registers, EEPROM, or microcontroller-ensuring zero boot-time latency and eliminating I²C bus contention in dense motherboard layouts.
Can PI3EQX16612ZLDEX be used in PCIe Gen 5 systems?
No. The PI3EQX16612ZLDEX is specified and characterized up to 16 Gbps (PCIe Gen 4). Its linear EQ architecture and CML I/O bandwidth are not validated for 32 Gbps (Gen 5) operation; eye opening degrades beyond 18 Gbps due to limited high-frequency gain and increased jitter accumulation.
What is the function of the PRSNT# pin?
The PRSNT# pin is an open-drain output that asserts low when the ReDriver detects a valid PCIe-compatible presence signal on its input (e.g., from a plugged-in M.2 module). It interfaces directly with platform power management controllers to enable or disable downstream power rails synchronously with physical device insertion.
How does the RXDET squelch function improve system power efficiency?
RXDET monitors differential input amplitude and disables the corresponding A/TX and B/TX output drivers when signal falls below −100 mVpp. This cuts per-channel supply current from 85 mA to <12 mA, reducing total package power by up to 320 mW in quad-channel idle states-critical for thermally constrained mobile workstations.
PI3EQX16612ZLDEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Buffer, ReDriver
- Applications:
- PCIe
- Input:
- CML
- Output:
- CML
- Data Rate (Max):
- 16Gbps
- Number of Channels:
- 4
- Delay Time:
- -
- Signal Conditioning:
- Input Equalization
- Capacitance - Input:
- -
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (3x6)
PI3EQX16612ZLDEX FAQ
1.How can I place an order for PI3EQX16612ZLDEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3EQX16612ZLDEX 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 PI3EQX16612ZLDEX reliable?
The price and inventory of PI3EQX16612ZLDEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3EQX16612ZLDEX is usually 5 days.
3.What payment methods are accepted for PI3EQX16612ZLDEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3EQX16612ZLDEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3EQX16612ZLDEX?
PI3EQX16612ZLDEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3EQX16612ZLDEX 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 PI3EQX16612ZLDEX?
For technical support, including PI3EQX16612ZLDEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3EQX16612ZLDEX requirements.
6.How does Aetrix verify that PI3EQX16612ZLDEX is sourced from the original manufacturer or authorized distributors?
All PI3EQX16612ZLDEX 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 PI3EQX16612ZLDEX meets industry standards.
7.What is the process for return or replacement of PI3EQX16612ZLDEX?
All PI3EQX16612ZLDEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3EQX16612ZLDEX, 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 PI3EQX16612ZLDEX part is unused and in its original packaging.
Return procedure for PI3EQX16612ZLDEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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