Diodes Incorporated PI6C5912016ZDIEX

Overview

PI6C5912016ZDIEX from Diodes Incorporated is a 16-output LVPECL fanout buffer IC designed for high-frequency clock distribution in telecom and networking infrastructure. It supports up to 2 GHz output frequency, delivers ultra-low additive phase jitter (<0.04 ps RMS at 156.25 MHz, 12 kHz–20 MHz), and features dual selectable differential/single-ended reference inputs (REF_IN0/REF_IN1) with IN_SEL control. Used in 10G/25G switch backplanes and high-speed SerDes timing trees.

For engineers reviewing the PI6C5912016ZDIEX datasheet, PI6C5912016ZDIEX pinout, PI6C5912016ZDIEX application, or PI6C5912016ZDIEX equivalent, key selection criteria include LVPECL output skew (<30 ps), separate VDD/VDDO supplies for level shifting, industrial temperature range (−40°C to +85°C), and TQFN-48 thermal performance (ΘJA = 23.65°C/W).

Technical Context

This device implements a low-skew, high-fanout clock distribution architecture with two independent differential input channels multiplexed via an LVCMOS/LVTTL-compatible IN_SEL pin. Each of its 16 LVPECL output pairs (Q0+ to Q15−) shares matched propagation delay (TPD typ. 620–700 ps) and maintains tight inter-output skew (TSK typ. 13 ps).

The core operates from 2.5 V or 3.3 V VDD, while outputs are powered by independently configurable VDDO (2.5 V or 3.3 V), enabling level translation across voltage domains. Bias voltage VREF_AC is internally generated and stabilized at VDD−1.1 to VDD−1.6 V for AC-coupled input termination.

Key Specifications

Pinout & Package

PI6C5912016ZDIEX is housed in a 48-pin Very Thin Quad Flat No-Lead (TQFN) package (ZD suffix), 7 mm × 7 mm × 0.8 mm, with exposed thermal pad connected to GND for enhanced thermal dissipation (ΘJC = 9.10°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A and NB7L14M, PI6C5912016ZDIEX offers optimal balance of channel count, jitter performance, and hardware-based redundancy-making it the preferred choice for high-density, jitter-critical telecom clock trees without added PLL complexity or footprint penalty.

Availability

PI6C5912016ZDIEX is available at Aetrix Electronics and suitable for 10G/25G Ethernet switches, optical transport platforms, high-frequency backplane computing, and 5G radio unit baseband applications requiring stable component supply, long-term lifecycle support, and RoHS3-compliant sourcing.

Supply support for PI6C5912016ZDIEX 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for high-performance power management, signal integrity, and timing applications.

The PI6C5912016 belongs to Diodes' Pericom timing portfolio, engineered specifically for ultra-low-jitter clock distribution in next-generation networking, telecom, and high-speed computing infrastructure.

FAQ

What is the recommended power supply decoupling for PI6C5912016ZDIEX?

Each VDD and VDDO pin requires individual 0.1 µF ceramic + 1 µF tantalum bypass capacitors placed within 2 mm of the pin. The thermal pad must be connected to a solid GND plane using ≥4 thermal vias. This configuration reduces supply-induced jitter by >40% and maintains TSK <15 ps across temperature.

Can PI6C5912016ZDIEX accept LVDS input signals?

Yes - REF_IN0± and REF_IN1± support LVDS inputs (differential amplitude 0.1–1.5 V_PP) with internal 100 Ω termination. No external resistors are needed. Input common-mode voltage must be between GND+0.5 V and VDD−0.85 V, compatible with standard LVDS receivers.

How does IN_SEL behave when left floating?

IN_SEL has an internal 200 kΩ pulldown resistor. When left unconnected, it defaults to logic '0', selecting REF_IN0 as the active reference input and placing all outputs in Hi-Z state until a valid clock is detected - a fail-safe mode preventing spurious output activation during power-up sequencing.

What is the maximum trace length supported for LVPECL outputs driving 100 Ω differential loads?

At 2 GHz, the recommended maximum FR4 trace length is 10 inches with controlled 100 Ω differential impedance. Beyond this, signal integrity degrades due to skin effect and dielectric loss; simulation shows >1.5 dB insertion loss and >0.15 UI jitter increase at 12 inches, violating PCIe Gen5 eye mask requirements.