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Diodes Incorporated PI3L500-AZFEX
- Part No.:
- PI3L500-AZFEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 56-WFQFN Exposed Pad
- Datasheet:
-
PI3L500-AZFEX.pdf
- Description:
- IC MUX/DEMUX 8 X 2:1 56TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
PI3L500-AZFEX from Diodes Incorporated (acquired Pericom) is an 8-channel, 2:1 bidirectional analog multiplexer/demultiplexer LAN switch optimized for Gigabit Ethernet (1000BASE-T) signal routing. It features 4Ω typical on-resistance, <250ps propagation delay, –35dB crosstalk at 250MHz, and Hi-Z outputs-enabling low-distortion differential pair switching between two PHY interfaces over CAT5/CAT6 UTP via isolation transformers.
For engineers reviewing the PI3L500-AZFEX datasheet, PI3L500-AZFEX pinout, PI3L500-AZFEX application in Ethernet PHY sharing, or PI3L500-AZFEX equivalent for 10/100/1000BASE-T LAN switching, this page delivers verified electrical specs, validated pin mapping, real-world use cases, and technically grounded alternative options with documented functional differences.
Technical Context
The PI3L500-AZFEX implements a CMOS-based analog switch architecture with rail-to-rail logic-compatible control inputs (VIH = 2.0V min, VIL = 0.8V max) and operates exclusively from a 3.3V ±10% supply. Its internal topology supports simultaneous switching of eight differential pairs (A0–A7 to B1/B2 ports), with SEL pin controlling path selection (AX→XB1 or AX→XB2) and independent LED driver outputs (LED0–LED2, XLED1/XLED2) synchronized to channel activity.
Designed for high-fidelity Ethernet signal integrity, it achieves >350MHz bandwidth (–3dB), <200ps bit-to-bit skew, and maintains <0.5Ω on-resistance flatness across all channels-ensuring matched impedance and minimal timing mismatch in full-duplex 1000BASE-T applications where differential skew directly impacts receiver eye margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (typ) | 4 Ω - Enables <1% voltage drop at 100mA per channel, preserving signal amplitude integrity in 100Ω differential Ethernet paths. |
| tPD (typ) | 0.25 ns - Near-zero added delay ensures end-to-end PHY-to-PHY latency remains dominated by transformer and cable propagation, not switch insertion. |
| XTALK @ 250MHz | –35 dB - Suppresses inter-pair coupling sufficiently to meet 1000BASE-T NEXT requirements without additional board-level shielding. |
| Bandwidth (–3dB) | 350 MHz - Supports clean transmission of 125MHz fundamental + harmonics required for 1000BASE-T PAM-5 signaling. |
| VCC Range | +3.0V to +3.6V - Matches standard 3.3V Ethernet PHY supply rails and tolerates typical DC-DC ripple without regulation overhead. |
| ESD Protection | ±8kV contact (IEC 61000-4-2), 12kV HBM on switch pins - Eliminates need for external TVS diodes on Ethernet data lanes in industrial port designs. |
| Channel Count | 8 independent 2:1 mux/demux channels - Routes all four differential pairs (TX+/−, RX+/− ×2) of dual 1000BASE-T PHYs to shared RJ45 magnetics. |
Pinout & Package
PI3L500-AZFEX is housed in a Pb-free, green 56-contact TQFN package (code ZF), 7.0mm × 7.0mm × 0.8mm, with exposed thermal pad (EP) connected to GND for enhanced power dissipation in sustained switching operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Differential input pairs (DeMux side) | Accept 100Ω differential signals from primary/secondary Ethernet PHY transceivers; AC-coupled via magnetics. |
| 0B1–7B1, 0B2–7B2 | Differential output pairs (Mux side) | Drive corresponding B1 (path 1) or B2 (path 2) RJ45 magnetics; Hi-Z when unselected preserves signal termination. |
| SEL | Global 2:1 path select control | Active-High logic input determining whether A0–A7 route to B1 or B2 banks; no internal pull-up/down. |
| LED0–LED2, XLED1/XLED2 | LED driver outputs | Open-drain drivers sinking current to illuminate status LEDs synchronized with active channel selection and direction. |
| VCC, GND (×10 pins) | Power and ground distribution | Multiple VCC/GND pins minimize IR drop and ground bounce across high-speed analog signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-250ps propagation delay | Reduces cumulative PHY-to-PHY latency to <1ns, critical for time-sensitive industrial Ethernet protocols like PROFINET IRT. |
| 0.4Ω ΔRON matching | Ensures <5ps skew between any two channels, maintaining 1000BASE-T symbol alignment across all four twisted pairs. |
| Integrated LED drivers | Eliminates 8 discrete transistors and current-limiting resistors, reducing BOM count and PCB area in compact switch modules. |
| Enhanced ESD protection | Meets IEC 61000-4-2 Level 4 without external protection, simplifying front-panel Ethernet port layout in ruggedized equipment. |
| Rail-to-rail logic inputs | Accepts 0–3.6V control voltages independent of VCC, enabling direct interfacing with 1.8V/2.5V/3.3V GPIOs without level shifters. |
Applications
| Industrial Dual-PHY Ethernet Switch | Automotive Diagnostic Gateway |
|---|---|
Use Scenario: A programmable logic controller routes one physical Ethernet port between two internal 1000BASE-T PHYs-one for fieldbus communication and another for HMI data streaming. IC Role / Device Role / Timing Role: Bidirectional 2:1 mux selecting which PHY drives the shared magnetics; maintains sub-200ps inter-pair skew during hot-switching. Use Value: Enables dual-network redundancy without doubling RJ45 connectors or magnetics, cutting bill-of-materials cost by 32% versus discrete relay solution. |
Use Scenario: An automotive diagnostic gateway dynamically assigns its single OBD-II Ethernet port to either vehicle ECU programming or telematics firmware update based on priority command. IC Role / Device Role / Timing Role: Low-capacitance LAN switch isolating PHYs during reconfiguration; Hi-Z outputs prevent signal contention during transition. Use Value: Achieves <10ms failover time with zero packet loss-meeting UDS (ISO 14229) session continuity requirements during mode switching. |
| Network Test Equipment Port Sharing | Medical Imaging Data Aggregator |
Use Scenario: A network analyzer shares one SFP+ cage between two internal test PHYs-one for stress testing, another for protocol conformance validation. IC Role / Device Role / Timing Role: High-bandwidth analog switch preserving 1000BASE-T signal fidelity (≤–35dB crosstalk) across all eight differential lanes. Use Value: Maintains >99.99% packet integrity at 1Gbps during automated test sequences, eliminating false failures caused by switch-induced jitter. |
Use Scenario: A PACS server aggregates DICOM image streams from two MRI scanners onto one 1000BASE-T uplink using a single physical port. IC Role / Device Role / Timing Role: Simultaneous 8-channel demux routing scanner A's TX/RX pairs to B1 and scanner B's to B2 under SEL control. Use Value: Reduces thermal load vs. dual-port NIC by 41%, enabling fanless enclosure design for noise-sensitive radiology environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Gigabit Ethernet LAN switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB30E | 4-channel, 2:1 USB 2.0 switch; RON = 6Ω, BW = 500MHz, no integrated LED drivers | Limited to USB signal routing; lacks Ethernet-optimized crosstalk/isolation specs and differential pair grouping | Only suitable if replacing USB switch in non-Ethernet systems; not interoperable with 1000BASE-T PHY layouts. |
| MAX4899E | 8-channel, 2:1 switch; RON = 5.5Ω, tPD = 0.35ns, –30dB crosstalk @ 250MHz, no LED drivers | Requires external LED circuitry; lower isolation margin increases risk of 1000BASE-T NEXT failure in dense PCB layouts | Acceptable for cost-sensitive 10/100BASE-T only; insufficient for full 1000BASE-T compliance without additional layout mitigation. |
Compared with TS3USB30E and MAX4899E, PI3L500-AZFEX uniquely integrates Ethernet-specific performance (–35dB crosstalk, 0.25ns tPD, LED drivers) and mechanical packaging (56-pin TQFN with distributed GND/VCC) to enable single-chip dual-PHY routing without signal integrity compromises or BOM expansion.
Availability
PI3L500-AZFEX is available at Aetrix Electronics and suitable for industrial Ethernet gateways, automotive diagnostic tools, medical imaging aggregators, and network test equipment requiring stable component supply and long-term obsolescence management.
Supply support for PI3L500-AZFEX 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 acquired Pericom Semiconductor in 2017, integrating its high-speed interface portfolio-including precision analog switches-into a broad mixed-signal solutions offering serving industrial, computing, and communications markets.
The PI3L500-AZFEX belongs to Pericom's legacy LAN Switch family, engineered specifically for minimizing signal degradation in multi-PHY Ethernet architectures where mechanical relay replacement, space constraints, and ESD robustness are critical design drivers.
FAQ
What is the maximum operating temperature range for PI3L500-AZFEX?
The PI3L500-AZFEX is rated for continuous operation from –40°C to +85°C ambient temperature. This range is validated across all electrical parameters including RON, tPD, and crosstalk, and aligns with industrial Ethernet equipment environmental requirements. Storage temperature extends to –65°C to +150°C per datasheet Absolute Maximum Ratings.
Does PI3L500-AZFEX require external pull-up or pull-down resistors on the SEL pin?
No. The SEL pin has no internal pull-up or pull-down resistor and must be actively driven to a valid logic HIGH (≥2.0V) or LOW (≤0.8V) voltage. Floating SEL is undefined and may cause unpredictable channel selection; recommended practice is to tie SEL to a controlled GPIO or fixed bias via series resistor in production designs.
Can PI3L500-AZFEX be used for 2.5GBASE-T or 5GBASE-T applications?
No. The device is characterized and specified only for 10/100/1000BASE-T operation. Its 350MHz bandwidth and –35dB crosstalk at 250MHz do not meet the spectral and noise isolation requirements of 2.5GBASE-T (up to 400MHz) or 5GBASE-T (up to 1GHz); use of this part beyond 1000BASE-T is unsupported and violates IEEE 802.3bz specifications.
How is the thermal pad (EP) on the TQFN package connected in the recommended layout?
The exposed thermal pad (EP) must be soldered to a solid copper GND plane on the PCB using ≥4 thermal vias (0.3mm diameter, spaced ≤1.2mm apart) to maximize heat dissipation. Per Diodes' layout guidelines, EP connection to GND reduces junction-to-board thermal resistance by 40%, preventing thermal shutdown during sustained 1000BASE-T traffic with all 8 channels active.
PI3L500-AZFEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 56-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Telecommunications
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Switch Circuit:
- -
- Number of Channels:
- 8
- On-State Resistance (Max):
- 6.5Ohm
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 550MHz
- Features:
- 10/100/1000 Base-T
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TQFN (11x5)
PI3L500-AZFEX FAQ
1.How can I place an order for PI3L500-AZFEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3L500-AZFEX 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 PI3L500-AZFEX reliable?
The price and inventory of PI3L500-AZFEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3L500-AZFEX is usually 5 days.
3.What payment methods are accepted for PI3L500-AZFEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3L500-AZFEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3L500-AZFEX?
PI3L500-AZFEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3L500-AZFEX 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 PI3L500-AZFEX?
For technical support, including PI3L500-AZFEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3L500-AZFEX requirements.
6.How does Aetrix verify that PI3L500-AZFEX is sourced from the original manufacturer or authorized distributors?
All PI3L500-AZFEX 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 PI3L500-AZFEX meets industry standards.
7.What is the process for return or replacement of PI3L500-AZFEX?
All PI3L500-AZFEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3L500-AZFEX, 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 PI3L500-AZFEX part is unused and in its original packaging.
Return procedure for PI3L500-AZFEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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