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Diodes Incorporated PI6C4921502TQ1ZHWEX
- Part No.:
- PI6C4921502TQ1ZHWEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Clock Buffers, Drivers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
PI6C4921502TQ1ZHWEX.pdf
- Description:
- CLOCK BUFFER W-QFN5050-32 T&R 2.
- Quantity:
- Payment:
- Shipping:
Inventory:1,263
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Product details
Overview
PI6C4921502TQ1ZHWEX from Diodes Incorporated is an AEC-Q100 Grade 1 automotive LVDS fanout buffer with 2 differential LVDS outputs (Bank A), supporting up to 1.5 GHz output frequency, <0.03 ps additive phase jitter (156.25 MHz, 12 kHz–20 MHz), and dual supply voltage (2.5 V / 3.3 V) for level shifting. It serves as a low-skew clock distribution device in ADAS sensor fusion modules requiring precise timing synchronization across multiple high-speed SerDes lanes.
For engineers reviewing the PI6C4921502TQ1ZHWEX datasheet, PI6C4921502TQ1ZHWEX pinout, PI6C4921502TQ1ZHWEX application, or PI6C4921502TQ1ZHWEX equivalent, this part delivers verified ultra-low jitter performance, selectable input sources (LVPECL/LVDS/HCSL/CML/CMOS/crystal), and automotive-grade thermal robustness (−40°C to +125°C) critical for radar and camera domain controller clock trees.
Technical Context
This device implements a dual-bank LVDS fanout architecture with independent power domains (VddA/VddB/VddRef) enabling flexible voltage translation between input and output stages. Input selection is controlled via CLK_SEL[1:0] pins, supporting three source modes: differential CLK0/nCLK0, differential CLK1/nCLK1, or single-ended/differential XTAL_IN.
The reference output (REFout) is LVCMOS-compatible up to 200 MHz and enabled via RefOutEn pin, while output banks feature matched propagation delay (<1.5 ns typical) and intra-bank skew <40 ps. All outputs meet LVDS electrical specifications per ANSI TIA/EIA-644-A with programmable termination support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 2 LVDS differential outputs (QA0/nQA0, QA1/nQA1) in Bank A only - supports compact 2-load fanout without over-provisioning. |
| Max Output Frequency | 1.5 GHz - enables direct clocking of 28 Gbps+ SerDes PHYs (e.g., MIPI A-PHY v2.0, Automotive Ethernet 10GBASE-T1). |
| Additive Phase Jitter | <0.03 ps RMS (156.25 MHz, 12 kHz–20 MHz) - meets stringent jitter budget for PCIe Gen5 and USB4 automotive repeater applications. |
| Supply Voltages | VddA = 2.5 V / 3.3 V; VddRef = 2.5 V / 3.3 V - allows independent level-shifting between core logic and output drivers for mixed-voltage system integration. |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1, suitable for under-hood and cockpit ECU placement without derating. |
| Input Compatibility | LVPECL, LVDS, HCSL, CML, CMOS, or crystal - eliminates need for external level translators when interfacing with diverse SoC clock sources. |
| Output Skew (Bank A) | <40 ps max - ensures deterministic timing alignment between QA0 and QA1 for dual-lane interfaces like LPDDR5X DQS/DQ groups. |
Pinout & Package
Package: 32-pin WQFN (ZHW), 5.0 mm × 5.0 mm, 0.5 mm pitch, ePad exposed thermal pad connected to PCB ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 17, 24 | GND | Ground reference for core, Bank A, Bank B, and REF output domains - requires low-inductance connection to PCB ground plane. |
| 2, 5 | VddA | Power supply for Bank A LVDS output drivers - must be decoupled with 0.1 µF + 1 µF capacitors per pin per datasheet layout guidance. |
| 4, 3 | QA0 / nQA0 | Differential LVDS clock output pair (Bank A) - terminated with 100 Ω differential load at receiver; supports >1.5 GHz operation. |
| 6, 7 | QA1 / nQA1 | Differential LVDS clock output pair (Bank A) - electrically matched to QA0/nQA0 for sub-40 ps intra-bank skew. |
| 10, 28 | VDD | Core logic supply (2.375–3.465 V) - powers internal MUX, control logic, and input receivers; separate from output supplies. |
| 11 | XTAL_IN | Single-ended or differential crystal/XO input - accepts 10–50 MHz fundamental-mode crystals; internal biasing supports DC-coupled CMOS clocks. |
| 13, 16 | CLK_SEL0 / CLK_SEL1 | 2-bit input selection control - sets active clock source per Table 1 (e.g., 00 = CLK0/nCLK0; 01 = CLK1/nCLK1; 1X = XTAL_IN). |
| 14, 15 | CLK0 / nCLK0 | Differential primary clock input - supports LVDS/LVPECL/HCSL/CML signals up to 1.5 GHz; common-mode range 0.25 V to VDD−1.2 V. |
| 27, 26 | CLK1 / nCLK1 | Differential secondary clock input - identical electrical specs to CLK0/nCLK0; enables redundant or alternate clock path routing. |
| 29 | RefOut | LVCMOS reference clock output - configurable up to 200 MHz; used for MCU watchdog timers or auxiliary timing domains. |
| 30 | VddRef | Supply for REFout driver - independently set to 2.5 V or 3.3 V to match downstream logic voltage. |
| 31 | RefOutEn | Active-high enable for REFout - Hi-Z when low; supports dynamic power gating of reference output during sleep modes. |
| ePad | Thermal Pad | Exposed copper pad - must be soldered to solid internal/external ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low additive jitter | <0.03 ps RMS (156.25 MHz) - preserves signal integrity in high-speed serial links where jitter accumulation degrades BER. |
| Independent output supply domains | VddA/VddB/VddRef separable - enables simultaneous 3.3 V core, 2.5 V LVDS outputs, and 1.8 V REFout for multi-rail SoC integration. |
| Input multiplexing with no external components | CLK_SEL[1:0] selects among 3 clock sources - eliminates need for external analog switches or FPGA-based mux logic. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with PPAP documentation - satisfies OEM requirements for safety-critical ADAS ECUs. |
| Crystal oscillator interface support | XTAL_IN/XTAL_OUT pins with internal biasing - allows direct connection of 25 MHz ±30 ppm crystals without external load caps or buffers. |
Applications
| Radar Sensor Module | ADAS Domain Controller |
|---|---|
|
Use Scenario: Distributing synchronized 156.25 MHz sampling clocks to four cascaded 77 GHz radar transceivers (e.g., TI AWR2944) within a single front radar ECU. IC Role / Device Role / Timing Role: Low-jitter fanout buffer providing two matched LVDS clock pairs to drive ADC clock inputs and digital down-converter sampling clocks. Use Value: Sub-40 ps intra-bank skew ensures time-of-flight measurement consistency across channels; <0.03 ps jitter prevents range resolution degradation beyond ±1 cm. |
Use Scenario: Clocking dual-core automotive SoC (e.g., NXP S32G3) with independent high-speed interfaces: PCIe Gen4 for telematics and Gigabit Ethernet for OTA updates. IC Role / Device Role / Timing Role: Primary clock distributor generating dedicated LVDS clocks for PCIe root complex and Ethernet MAC PHYs from a shared crystal reference. Use Value: Dual-supply architecture isolates noise between SoC domains; AEC-Q100 qualification guarantees reliability across vehicle lifecycle without thermal derating. |
| Automotive Camera ECU | In-Vehicle Infotainment Head Unit |
|
Use Scenario: Driving two MIPI CSI-2 image sensor interfaces (e.g., Sony IMX570 + ON Semi AR0820) in a surround-view camera processing module. IC Role / Device Role / Timing Role: Fanout buffer delivering matched 400 MHz LVDS pixel clocks to both sensors' timing controllers, synchronized to a central vision processor. Use Value: 1.5 GHz capability supports future 8K/60 fps sensor upgrades; LVDS outputs eliminate EMI concerns in tight camera harness routing. |
Use Scenario: Providing reference clocks to audio DSP (e.g., TI TDA7729), display controller (e.g., Renesas R-Car H3), and Bluetooth/WiFi SoC in premium head unit. IC Role / Device Role / Timing Role: Multi-protocol clock source supplying LVCMOS REFout (for audio codec) and LVDS clocks (for display interface) from single crystal input. Use Value: Single-chip solution reduces BOM count vs. discrete oscillators; RoHS3/Green compliance meets global automotive environmental mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS fanout buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PI6C4921504TQ1ZHWEX | 4-output variant (2 per bank) with identical jitter, supply, and temperature specs - shares same pinout except QB0/nQB0 and QB1/nQB1 added on pins 18–19/21–22. | Supports 4-load fanout without redesign; requires additional PCB routing and termination but no firmware change. | Select when future scalability to 4 endpoints is required or when existing layout accommodates full 32-pin footprint. |
| Si53320-B-GM | 2-output LVDS buffer with 0.05 ps jitter (156.25 MHz), 2.5 V only supply, and no crystal input - lacks REFout and AEC-Q100 qualification. | Limited to non-automotive industrial use; no built-in crystal interface necessitates external XO or clock generator. | Consider only for cost-sensitive non-automotive designs where AEC-Q100 and multi-source input are not required. |
Compared with PI6C4921504TQ1ZHWEX, the 2-output variant offers identical performance in smaller thermal footprint and lower quiescent current; versus Si53320-B-GM, it adds automotive qualification, crystal support, and LVCMOS REFout - making it the sole choice for production ADAS systems.
Availability
PI6C4921502TQ1ZHWEX is available at Aetrix Electronics and suitable for radar sensor modules, ADAS domain controllers, automotive camera ECUs, and infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PI6C4921502TQ1ZHWEX 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 timing solutions for automotive, industrial, and computing markets.
The PI6C492150xTQ product line delivers automotive-qualified clock fanout buffers optimized for low-jitter, multi-protocol clock distribution in ADAS, infotainment, and vehicle networking systems - addressing OEM demands for AEC-Q100 compliance and PPAP-ready supply chains.
FAQ
What input clock sources does PI6C4921502TQ1ZHWEX support?
It supports LVPECL, LVDS, HCSL, CML, CMOS, and crystal/XO inputs via dedicated pins (CLK0/nCLK0, CLK1/nCLK1, XTAL_IN). Input selection is controlled by CLK_SEL[1:0], with no external components needed. Crystal mode operates from 10–50 MHz and includes internal biasing for direct connection to fundamental-mode crystals like 25 MHz ±30 ppm devices.
How is output skew managed between QA0/nQA0 and QA1/nQA1?
Intra-bank skew is guaranteed ≤40 ps across −40°C to +125°C, achieved through matched internal routing, symmetric driver design, and on-die calibration. This specification applies under matched PCB trace lengths and 100 Ω differential termination. The device does not require external skew compensation circuitry.
Can PI6C4921502TQ1ZHWEX drive both 2.5 V and 3.3 V LVDS loads simultaneously?
No - VddA sets the output voltage level for all Bank A outputs (QA0/nQA0, QA1/nQA1). To drive mixed-voltage loads, external level translators are required. However, VddA can be set to either 2.5 V or 3.3 V (within 2.375–3.465 V range) to match the target load's common-mode requirement.
Is the REFout pin capable of driving a microcontroller's external clock input?
Yes - REFout is a push-pull LVCMOS output supporting frequencies up to 200 MHz and drive strength compliant with standard MCU clock inputs (e.g., 8 mA sink/source at 3.3 V). Its enable/disable control (RefOutEn) allows dynamic power gating, and VddRef can be set independently to match the MCU's I/O voltage (2.5 V or 3.3 V).
PI6C4921502TQ1ZHWEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 3:2
- Differential - Input:Output:
- Yes/Yes
- Input:
- LVCMOS, LVDS, Crystal
- Output:
- LVCMOS, LVDS
- Frequency - Max:
- 1.5 GHz
- Voltage - Supply:
- 2.375V ~ 3.465V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 32-WQFN (5x5)
PI6C4921502TQ1ZHWEX FAQ
1.How can I place an order for PI6C4921502TQ1ZHWEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6C4921502TQ1ZHWEX 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 PI6C4921502TQ1ZHWEX reliable?
The price and inventory of PI6C4921502TQ1ZHWEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6C4921502TQ1ZHWEX is usually 5 days.
3.What payment methods are accepted for PI6C4921502TQ1ZHWEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6C4921502TQ1ZHWEX transactions.
Note: Certain payment methods may incur a processing fee.
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PI6C4921502TQ1ZHWEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6C4921502TQ1ZHWEX 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 PI6C4921502TQ1ZHWEX?
For technical support, including PI6C4921502TQ1ZHWEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6C4921502TQ1ZHWEX requirements.
6.How does Aetrix verify that PI6C4921502TQ1ZHWEX is sourced from the original manufacturer or authorized distributors?
All PI6C4921502TQ1ZHWEX 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 PI6C4921502TQ1ZHWEX meets industry standards.
7.What is the process for return or replacement of PI6C4921502TQ1ZHWEX?
All PI6C4921502TQ1ZHWEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6C4921502TQ1ZHWEX, 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 PI6C4921502TQ1ZHWEX part is unused and in its original packaging.
Return procedure for PI6C4921502TQ1ZHWEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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