Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated PI6C5916004ZHIEX

Name: PI6C5916004ZHIEX
Brand: Diodes Incorporated
SKU: PI6C5916004ZHIEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PI6C5916004ZHIEX

Manufacturer:: Diodes Incorporated

Category:: Clock Buffers, Drivers

Package:: 16-WFQFN Exposed Pad

Datasheet:: PI6C5916004ZHIEX.pdf

Description:: IC CLK BUFFER 1:4 6GHZ 16TQFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,339

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PI6C5916004ZHIEX from Diodes Incorporated is a 6 GHz, 1:4 LVPECL fanout buffer with internal termination, designed for high-speed clock distribution in telecom and datacom systems. It accepts LVPECL, LVDS, CML, and SSTL inputs; delivers four differential LVPECL output pairs (Q0–Q3); features <0.05 ps RMS additive jitter; operates from 2.5 V ±5% or 3.3 V ±10%; and supports –40°C to +85°C ambient temperature.

For engineers reviewing the PI6C5916004ZHIEX datasheet, PI6C5916004ZHIEX pinout, PI6C5916004ZHIEX application, or PI6C5916004ZHIEX equivalent, key selection criteria include input compatibility across multiple logic families, sub-20 ps output-to-output skew, integrated AC-coupling bias reference (VREF-AC), and TQFN-16 (ZH) package suitability for dense high-frequency PCB layouts.

Technical Context

This device implements a low-skew, single-ended-to-differential fanout architecture with synchronous enable (EN) control and internal 100 Ω differential input resistance. Its input stage supports DC- and AC-coupled operation via REF_IN+/REF_IN− and VTH/VREF-AC nodes, enabling flexible interface to oscillators, FPGAs, and SerDes PHYs.

The output stage delivers four matched LVPECL pairs with programmable termination support, 550–800 mV output swing, and propagation delay of 500 ps. Thermal design leverages the ePad-connected GND for Θ_JA = 57.7°C/W (still air), making it suitable for thermally constrained 1U server and optical line card applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Input Frequency	6 GHz - enables direct fanout from high-speed XO/VCXO sources used in 10G/25G Ethernet and PCIe Gen4+ reference clocks.
Output-to-Output Skew	<20 ps - ensures deterministic timing alignment across four downstream clock domains in multi-lane SerDes or FPGA clock trees.
Additive Jitter (RMS)	<0.05 ps - measured at 156.25 MHz with 12 kHz–20 MHz integration; critical for meeting SONET OC-192 and PCIe Gen5 jitter budgets.
Supply Voltage Range	2.5 V ±5% or 3.3 V ±10% - dual-rail support simplifies integration into mixed-voltage systems without external regulators.
Differential Input Resistance	90–110 Ω - matches standard 100 Ω differential trace impedance, minimizing reflections without external termination resistors.
VREF-AC Output	VDD − 1.4 V - provides precise AC-coupling bias for LVDS/CML inputs, eliminating need for external resistor dividers or LDOs.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade deployment in base station radios, network switches, and edge compute hardware.

Pinout & Package

PI6C5916004ZHIEX is housed in a 16-pin Thin Quad Flat No-Lead (TQFN) package with 3 mm × 3 mm body and 0.5 mm pitch (package code ZH). The exposed thermal pad (ePad) must be soldered to GND for optimal thermal performance and signal integrity.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (Q1+, Q1−)	Differential LVPECL Output Pair	One of four matched output channels; requires 150 Ω pull-down + 100 Ω across load for standard LVPECL termination.
3, 4 (Q2+, Q2−)	Differential LVPECL Output Pair	Second independent output pair; electrically identical to Q1; enables parallel clock distribution to two ASICs or FPGA banks.
5, 6 (Q3+, Q3−)	Differential LVPECL Output Pair	Third output channel; supports simultaneous fanout to SerDes lanes or memory controller clock inputs.
7, 14 (VDD)	Core Power Supply	Dual VDD pins reduce supply impedance; each requires local 0.1 µF decoupling capacitor on component side.
8 (EN)	Synchronous Enable Input	Active-high control with internal 25 kΩ pull-up; asserts all outputs simultaneously-no glitching during enable/disable transitions.
9, 12 (REF_IN−, REF_IN+)	Differential Clock Input	Accepts LVPECL/LVDS/CML/SSTL; internally terminated; floating if unused, but 1 kΩ to GND recommended for EMI robustness.
10 (VREF-AC)	AC-Coupling Reference Output	Biased at VDD − 1.4 V; supplies DC restore voltage for AC-coupled inputs-eliminates external bias networks.
11 (VTH)	Input Center-Tap Node	Tied to VREF-AC for AC-coupled mode; sets common-mode voltage; left unconnected for DC-coupled LVPECL inputs.
13 (GND)	Ground Reference	Primary ground return; connects to ePad for thermal and noise management; must be low-inductance plane connection.
15, 16 (Q0+, Q0−)	Differential LVPECL Output Pair	Primary output pair; often used for main system clock; pin 15 = Q0+, pin 16 = Q0− per standard LVPECL polarity convention.

Key Features

Feature	Design Value
Multi-standard input compatibility	LVPECL, LVDS, CML, and SSTL acceptance eliminates level-shifter ICs and reduces BOM count in heterogeneous clock architectures.
Integrated VREF-AC reference	On-die bias generator removes need for external resistor dividers or dedicated LDOs-reducing layout area and power supply complexity.
Low additive jitter & skew	<0.05 ps RMS jitter and <20 ps output skew preserve timing margins in 25G+ serial links and high-resolution ADC/DAC sampling clocks.
Synchronous output enable	Glitch-free EN control allows dynamic clock gating without metastability risk-essential for power-managed SoC subsystems.
Internal 100 Ω differential input termination	Reduces external component count and improves impedance matching consistency across production units and temperature ranges.

Applications

10G/25G Ethernet Line Cards

PCIe Gen4/Gen5 Reference Clock Distribution

Use Scenario: Fanout of a single 156.25 MHz or 312.5 MHz oscillator to four SFP28/QSFP28 transceivers and MAC controllers.

IC Role / Device Role / Timing Role: Low-jitter 1:4 LVPECL buffer providing phase-aligned clock copies with sub-20 ps skew across four physical lanes.

Use Value: Enables deterministic inter-lane skew control required for IEEE 802.3by and IEEE 802.3cd compliance without external delay tuning.

Use Scenario: Distributing a 100 MHz PCIe reference clock from a system-level oscillator to four PCIe root complex endpoints.

IC Role / Device Role / Timing Role: Fanout buffer delivering four matched LVPECL outputs compliant with PCIe Gen5 jitter spec (≤1.0 ps RMS, 12 kHz–20 MHz).

Use Value: Meets PCI-SIG jitter tool requirements without additional jitter cleaning stages-reducing latency and board space.

FPGA-Based High-Speed Data Acquisition

Optical Transport Network (OTN) Timing Modules

Use Scenario: Driving multiple high-speed ADCs (e.g., 1 GSPS) and FPGA fabric clocks from one ultra-low-noise VCXO source.

IC Role / Device Role / Timing Role: Clock distributor ensuring simultaneous sampling clock edges across parallel ADC channels and FPGA logic domains.

Use Value: Maintains <0.05 ps additive jitter to preserve ENOB in wideband RF digitization-critical for 5G NR and radar front ends.

Use Scenario: Providing synchronized 2.488 GHz (STM-16) and 9.953 GHz (STM-64) clocks to OTN framer/demapper ICs in DWDM line cards.

IC Role / Device Role / Timing Role: High-frequency fanout buffer supporting SONET/SDH and OTU4 timing requirements with guaranteed phase noise floor.

Use Value: Delivers <−150 dBc/Hz phase noise @ 10 kHz offset-meeting ITU-T G.823/G.825 jitter transfer specifications.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT8T49N242A	4-output, 6 GHz LVPECL buffer with integrated PLL; higher power (220 mA), larger 32-QFN package.	Supports frequency translation and jitter cleanup; suited for systems requiring clock synthesis, not pure fanout.	Select when jitter attenuation or frequency flexibility is needed; avoid if only low-skew distribution is required.
ON Semiconductor NB3N502M	2-output, 2.5 GHz LVPECL buffer; lower max frequency, no internal VREF-AC, requires external bias network.	Limited to ≤2.5 GHz applications; lacks AC-coupling support-requires redesign for CML/LVDS inputs.	Choose only for cost-sensitive, lower-frequency designs where VREF-AC and 6 GHz headroom are unnecessary.

Compared with IDT8T49N242A and NB3N502M, PI6C5916004ZHIEX uniquely balances 6 GHz bandwidth, integrated VREF-AC, and 4-channel LVPECL fanout in a compact TQFN-16 package-making it optimal for space-constrained, high-frequency clock tree applications without added synthesis complexity or external bias components.

Availability

PI6C5916004ZHIEX is available at Aetrix Electronics and suitable for 10G/25G Ethernet line cards, PCIe Gen4/Gen5 reference clock distribution, FPGA-based high-speed data acquisition, and optical transport network timing modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PI6C5916004ZHIEX 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 industrial, computing, and communications markets.

PI6C5916004 belongs to Diodes' Precision Timing product line, engineered specifically for ultra-low-jitter clock distribution in next-generation datacenter, telecom, and test equipment-where phase noise, skew, and input flexibility directly impact system bit error rate and throughput.

FAQ

What input logic standards does PI6C5916004ZHIEX support?

PI6C5916004ZHIEX supports LVPECL, LVDS, CML, and SSTL input levels. Its differential input accepts both AC- and DC-coupled signals, with internal 100 Ω termination and VREF-AC output for bias recovery in AC-coupled configurations. No external level-shifting circuitry is required for any of these standards.

How is the EN pin used, and what is its default state?

The EN pin is an active-high synchronous enable input with an internal 25 kΩ pull-up resistor. When pulled high (≥2.0 V), all four LVPECL output pairs are enabled; when pulled low (≤0.8 V), outputs enter high-impedance state. Default state is enabled due to internal pull-up, ensuring predictable startup behavior without external components.

Can PI6C5916004ZHIEX drive HCSL loads directly?

No-it does not natively support HCSL output levels. However, its LVPECL outputs can drive HCSL inputs using an external AC Thevenin termination (e.g., 450 Ω pull-up + 60 Ω pull-down) to generate ~0.4 V common-mode voltage. This configuration is validated in Diodes' application notes for PCIe reference clock distribution.

What is the recommended power supply decoupling strategy?

Each VDD pin (pins 7 and 14) requires a minimum 0.1 µF ceramic capacitor placed on the component side, adjacent to the pin. For improved high-frequency noise suppression, add a 1 µF capacitor in parallel. Avoid shared vias between decoupling caps and GND; connect directly to solid ground plane under the ePad.

PI6C5916004ZHIEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-WFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Fanout Buffer (Distribution)

Number of Circuits:: 1

Ratio - Input:Output:: 1:4

Differential - Input:Output:: Yes/Yes

Input:: LVCMOS

Output:: LVPECL

Frequency - Max:: 6 GHz

Voltage - Supply:: 2.375V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 16-TQFN (3x3)

PI6C5916004ZHIEX FAQ

1.How can I place an order for PI6C5916004ZHIEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI6C5916004ZHIEX 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 PI6C5916004ZHIEX reliable?

The price and inventory of PI6C5916004ZHIEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6C5916004ZHIEX is usually 5 days.

3.What payment methods are accepted for PI6C5916004ZHIEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6C5916004ZHIEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI6C5916004ZHIEX?

PI6C5916004ZHIEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI6C5916004ZHIEX 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 PI6C5916004ZHIEX?

For technical support, including PI6C5916004ZHIEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6C5916004ZHIEX requirements.

6.How does Aetrix verify that PI6C5916004ZHIEX is sourced from the original manufacturer or authorized distributors?

All PI6C5916004ZHIEX 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 PI6C5916004ZHIEX meets industry standards.

7.What is the process for return or replacement of PI6C5916004ZHIEX?

All PI6C5916004ZHIEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6C5916004ZHIEX, 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 PI6C5916004ZHIEX part is unused and in its original packaging.

Return procedure for PI6C5916004ZHIEX:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…