Diodes Incorporated PI6C4911506-06LIEX

Overview

PI6C4911506-06LIEX from Diodes Incorporated is a low-skew, 1-to-6 LVPECL fanout buffer supporting crystal, LVCMOS, and differential clock inputs with up to 1.5 GHz output frequency, <0.03 ps typical additive jitter (12 kHz–20 MHz), and 1.5 ns typical propagation delay. It delivers six differential LVPECL output pairs for high-speed clock distribution in telecom infrastructure and FPGA timing systems.

For engineers reviewing the PI6C4911506-06LIEX datasheet, PI6C4911506-06LIEX pinout, PI6C4911506-06LIEX application, or PI6C4911506-06LIEX equivalent, key selection criteria include input flexibility (XTAL/LVCMOS/differential), industrial temperature range (−40°C to +85°C), TSSOP-24 package compatibility, and sub-80 ps output skew under matched load conditions.

Technical Context

This device integrates a configurable input multiplexer selecting among XTAL_IN/XTAL_OUT, single-ended CLK0, or differential CLK1/nCLK1, with independent CLK_EN and dual CLK_SEL pins enabling dynamic source switching. Internal termination resistors (51 kΩ pulldown on CLK0/CLK1, 51 kΩ pullup on nCLK1) simplify board-level interface design.

It operates from dual supply rails (VDD = 2.5 V or 3.3 V, VEE = 0 V), supports level-shifted I/O via separate VDD/VEE domains, and maintains <0.03 ps RMS additive jitter at 156.25 MHz with 12 kHz–20 MHz integration-critical for SerDes and PCIe Gen4+ clocking.

Key Specifications

Pinout & Package

Package: 24-pin TSSOP (173 mil wide), RoHS-compliant, tape-and-reel (X suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS853S01I-41LF and PI6C20400LE, the PI6C4911506-06LIEX uniquely combines 6 LVPECL outputs, 1.5 GHz capability, crystal/differential/LVCMOS input selection, and <0.03 ps jitter - making it optimal for high-density, multi-protocol timing architectures requiring minimal BOM count and maximum signal integrity.

Availability

PI6C4911506-06LIEX is available at Aetrix Electronics and suitable for 10G/25G Ethernet PHY clocking, FPGA multi-clock domain distribution, CPRI/O-RAN radio unit timing, and PCIe Gen4/Gen5 root complex clocking requiring stable component supply across extended temperature ranges.

Supply support for PI6C4911506-06LIEX 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.

The PI6C4911506-06LIEX belongs to Diodes' Precision Timing family, engineered specifically for low-jitter clock distribution in high-speed serial interfaces and multi-processor synchronization systems.

FAQ

What input types does the PI6C4911506-06LIEX support?

The device supports three input configurations: parallel-resonant crystal (12–40 MHz) via XTAL_IN/XTAL_OUT, single-ended LVCMOS/LVTTL (CLK0), and differential (CLK1/nCLK1). Input selection is controlled by CLK_SEL0 and CLK_SEL1 pins per the Configuration Table on page 6 of the datasheet. No external level shifters or buffers are required for any mode.

Does the PI6C4911506-06LIEX require external termination resistors for LVPECL outputs?

Yes - each differential LVPECL output pair (e.g., Q0/nQ0) requires a 100 Ω Thevenin termination to VDD − 2 V (typically implemented as two 50 Ω resistors: one to VDD − 2 V, one to ground). This matches standard LVPECL load requirements and ensures signal integrity at frequencies up to 1.5 GHz.

Can the PI6C4911506-06LIEX operate with only a 2.5 V supply?

Yes - the device is fully specified for VDD = 2.5 V ±5% (2.375 V to 2.625 V) across the full −40°C to +85°C operating range. All AC and DC parameters, including 1.5 GHz max output frequency and <0.03 ps jitter, are guaranteed at 2.5 V, enabling compatibility with low-voltage FPGA and ASIC power domains.

Is there a version of this part with different temperature grading or packaging?

Yes - the base part PI6C4911506-06LIE is identical except supplied in cut-tape (not tape-and-reel), while PI6C4911506-06ZHEX offers extended temperature (−40°C to +105°C) in TSSOP-24. No automotive-grade (AEC-Q100) variant exists for this specific part number.