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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Buffers, Drivers

Diodes Incorporated PI6C4921506LIEX

Name: PI6C4921506LIEX
Brand: Diodes Incorporated
SKU: PI6C4921506LIEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI6C4921506LIEX

Manufacturer:: Diodes Incorporated

Category:: Clock Buffers, Drivers

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: PI6C4921506LIEX.pdf

Description:: IC CLK BUFFER 1:6 1.5GHZ 24TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PI6C4921506LIEX from Diodes Incorporated is a high-performance LVDS fanout buffer IC with 6 differential LVDS outputs, supporting up to 1.5 GHz output frequency, ultra-low additive phase jitter (< 0.03 ps RMS, 12 kHz–20 MHz), <1.5 ns typical propagation delay, and dual supply support (2.5 V / 3.3 V) for level-shifting applications in high-speed clock distribution systems.

For engineers reviewing the PI6C4921506LIEX datasheet, PI6C4921506LIEX pinout, PI6C4921506LIEX application, or PI6C4921506LIEX equivalent, key selection criteria include differential input compatibility, LVDS output skew ≤55 ps, industrial temperature range (−40°C to +85°C), TSSOP-24 package footprint, and RoHS-compliant green packaging.

Technical Context

The PI6C4921506LIEX implements a single-ended or differential clock input interface with proprietary input detection logic that flags illegal input conditions via defined output states. It supports non-inverting differential-to-differential and single-ended-to-differential translation modes, with configurable biasing.

Its architecture delivers deterministic low-skew distribution across six matched LVDS output pairs (Q0–Q5/nQ0–nQ5), each independently powered by VDDO, enabling voltage-level isolation between input core (VDD) and output drivers - critical for mixed-voltage system clock trees.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Count	6 LVDS differential output pairs (Q0–Q5/nQ0–nQ5)
Max Output Frequency	1.5 GHz - supports PCIe Gen5, 10G/25G Ethernet, and high-speed SerDes reference clocks
Additive Phase Jitter	<0.03 ps RMS (156.25 MHz, 12 kHz–20 MHz) - meets stringent jitter budgets for optical transport and telecom PHYs
Propagation Delay	800–1200 ps typ - enables precise timing alignment in multi-destination clock networks
Output Skew	≤55 ps - ensures sub-cycle synchronization across all 6 outputs under matched load conditions
Supply Voltages	VDD = 2.5 V or 3.3 V ±5%; VDDO = same - allows independent core/output voltage scaling for noise isolation
Operating Temp	−40°C to +85°C - qualified for industrial-grade embedded and networking equipment

Pinout & Package

Package: 24-pin TSSOP (173 mil wide, JEDEC MO-153), lead-free and halogen-free "Green" construction per Diodes' specifications.

Pin/Terminal	Circuit Role	Design Meaning
1, 2	nCLK / CLK	Differential clock input pair - accepts LVDS, LVPECL, or biased single-ended signals
3, 22	VDD	Core logic supply - powers internal detection circuitry and input stage
4, 10, 15, 21	VDDO	LVDS output driver supply - independently set for level-shifting and noise decoupling
5, 6	Q0 / nQ0	LVDS output pair 0 - matched routing required; 100 Ω differential termination needed
7, 18, 23, 24	GND	Ground reference - multiple pins minimize ground bounce across high-speed switching outputs
8, 9	Q1 / nQ1	LVDS output pair 1 - identical electrical specs and skew behavior as Q0
11, 12	Q2 / nQ2	LVDS output pair 2 - supports parallel clock fanout without external buffering
13, 14	Q3 / nQ3	LVDS output pair 3 - maintains <55 ps inter-pair skew at full 1.5 GHz operation
16, 17	Q4 / nQ4	LVDS output pair 4 - VDDO-supplied driver enables clean edge integrity into 100 Ω loads
19, 20	Q5 / nQ5	LVDS output pair 5 - final output channel; shares same propagation delay tolerance as others

Key Features

Feature	Design Value
Input Detection Logic	Flags invalid input states (e.g., floating, shorted, or common-mode violation) via defined output response - prevents undefined clock tree behavior
Dual Supply Architecture	VDD (core) and VDDO (output) separation enables voltage translation between 2.5 V and 3.3 V domains without level shifters
Ultra-Low Additive Jitter	<0.03 ps RMS (156.25 MHz) - preserves signal integrity for jitter-sensitive SerDes receivers
Matched Output Skew	≤55 ps across all 6 LVDS pairs - eliminates need for external deskew compensation in backplane designs
Industrial Temperature Range	−40°C to +85°C operation - validated for deployment in uncooled telecom line cards and enterprise switches

Applications

10G/25G Ethernet Switches

PCIe Gen4/Gen5 Reference Clock Distribution

Use Scenario: Distributing low-jitter 156.25 MHz or 312.5 MHz reference clocks to multiple PHYs and MACs in Layer-2/Layer-3 switches.

IC Role / Device Role / Timing Role: Fanout buffer providing synchronized, skew-controlled LVDS clocks to 6 independent Ethernet ports.

Use Value: Enables deterministic latency and bit-error-rate compliance by maintaining <0.03 ps additive jitter and ≤55 ps inter-port skew.

Use Scenario: Delivering 100 MHz differential reference clocks to PCIe root complex, endpoint, and switch devices in server motherboards.

IC Role / Device Role / Timing Role: High-fidelity clock repeater ensuring PCIe specification-compliant jitter (≤1.0 ps RMS) after fanout.

Use Value: Meets PCIe Gen5 jitter budget via ultra-low additive phase noise and matched propagation delay across all outputs.

Optical Transport Network (OTN) Line Cards

High-Speed Backplane Computing Platforms

Use Scenario: Generating synchronized 622.08 MHz or 1.24416 GHz clocks for SONET/SDH framer and mapper ICs in telecom line cards.

IC Role / Device Role / Timing Role: Low-phase-noise clock distributor feeding multiple framers and forward error correction (FEC) blocks.

Use Value: Achieves <0.067 ps RMS jitter at 622.08 MHz (12 kHz–20 MHz), satisfying ITU-T G.823/G.825 requirements.

Use Scenario: Driving clock inputs of FPGAs, ASICs, and memory controllers across multi-slot VME or CompactPCI backplanes.

IC Role / Device Role / Timing Role: Centralized clock hub delivering phase-aligned LVDS clocks to distributed processing nodes.

Use Value: Eliminates inter-slot timing misalignment using <1.5 ns propagation delay and sub-60 ps output skew.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVDS fanout buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT8T49N286A	8 LVDS outputs; integrated PLL; higher power (120 mA IDD); 0.025 ps jitter (156.25 MHz)	Requires external crystal; supports frequency synthesis; not drop-in compatible due to different pinout and control interface	Select when programmable output frequency or PLL-based jitter cleaning is required
Si53302-A01AGM	6 LVDS outputs; no internal PLL; 0.04 ps jitter (156.25 MHz); 2.5 V only supply	Fixed-frequency fanout only; lacks input detection logic; smaller 20-QFN package	Select for space-constrained designs needing identical output count but lower integration overhead

Compared with IDT8T49N286A and Si53302-A01AGM, the PI6C4921506LIEX offers optimal balance of ultra-low jitter, industrial temperature support, dual-supply flexibility, and robust input condition monitoring - making it preferred for fixed-frequency, high-reliability clock distribution where simplicity and deterministic behavior are prioritized over synthesis capability.

Availability

PI6C4921506LIEX is available at Aetrix Electronics and suitable for 10G/25G Ethernet switches, PCIe Gen4/Gen5 server platforms, OTN line cards, and high-speed backplane computing systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for PI6C4921506LIEX 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The PI6C4921506LIEX belongs to Diodes' high-speed timing product line, engineered specifically for low-jitter clock distribution in networking, telecom, and computing infrastructure where signal integrity and thermal reliability are mission-critical.

FAQ

What input signal types does the PI6C4921506LIEX support?

The PI6C4921506LIEX accepts differential LVDS or LVPECL inputs on CLK/nCLK pins, and also supports biased single-ended inputs (e.g., CMOS or clipped sine wave) using internal termination. Input common-mode range is GND+0.5 V to VDD−0.85 V, and peak-to-peak voltage must be 0.15–1.3 V. The device's proprietary detection logic identifies invalid input conditions and reflects them in output state behavior.

Can VDD and VDDO be operated at different voltages?

No - VDD and VDDO must be set to the same nominal voltage (either both 2.5 V ±5% or both 3.3 V ±5%). The datasheet specifies separate pins to isolate core logic and output driver power domains, but does not support mixed-voltage operation between them. Independent decoupling is required for each supply rail to suppress noise coupling.

Is the PI6C4921506LIEX qualified for automotive applications?

No - the PI6C4921506LIEX is rated for industrial temperature (−40°C to +85°C) and is not AEC-Q100 qualified. Diodes explicitly states that automotive-grade variants require PPAP capability, IATF 16949 manufacturing, and specific change control - none of which apply to this part. For automotive use, contact Diodes directly for qualified alternatives.

What termination is required for LVDS outputs?

Each LVDS output pair (e.g., Q0/nQ0) requires a 100 Ω differential termination resistor placed as close as possible to the receiving device's input. The PI6C4921506LIEX drives standard LVDS loads with 326–526 mV differential output voltage (VOD) and 1.15–1.3 V common-mode offset (VOS). No on-die termination is provided; external 100 Ω matching is mandatory for signal integrity.

PI6C4921506LIEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Fanout Buffer (Distribution)

Number of Circuits:: 1

Ratio - Input:Output:: 1:6

Differential - Input:Output:: Yes/Yes

Input:: LVCMOS, LVTTL

Output:: LVDS

Frequency - Max:: 1.5 GHz

Voltage - Supply:: 2.375V ~ 3.465V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 24-TSSOP

PI6C4921506LIEX FAQ

1.How can I place an order for PI6C4921506LIEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI6C4921506LIEX 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 PI6C4921506LIEX reliable?

The price and inventory of PI6C4921506LIEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6C4921506LIEX is usually 5 days.

3.What payment methods are accepted for PI6C4921506LIEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6C4921506LIEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI6C4921506LIEX?

PI6C4921506LIEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI6C4921506LIEX 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 PI6C4921506LIEX?

For technical support, including PI6C4921506LIEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6C4921506LIEX requirements.

6.How does Aetrix verify that PI6C4921506LIEX is sourced from the original manufacturer or authorized distributors?

All PI6C4921506LIEX 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 PI6C4921506LIEX meets industry standards.

7.What is the process for return or replacement of PI6C4921506LIEX?

All PI6C4921506LIEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6C4921506LIEX, 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 PI6C4921506LIEX part is unused and in its original packaging.

Return procedure for PI6C4921506LIEX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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