Diodes Incorporated PI6C4911505-07LIE

Overview

PI6C4911505-07LIE from Pericom is a high-performance 1:5 LVPECL fanout buffer with dual selectable differential clock inputs, 1.5 GHz maximum output frequency, ultra-low additive phase jitter (<0.03 ps RMS, 12 kHz–20 MHz), 1.2 ns typical propagation delay, and support for 2.5 V / 3.3 V supplies in TSSOP-20 package. It distributes low-jitter clock signals across high-speed networking switch backplanes.

For engineers reviewing the PI6C4911505-07LIE datasheet, PI6C4911505-07LIE pinout, PI6C4911505-07LIE application, or PI6C4911505-07LIE equivalent, key selection criteria include differential input compatibility (LVPECL/LVDS/CML/HCSL), LVPECL output termination flexibility, input select control (CLK_SEL), synchronous enable (nEN), and industrial temperature range (-40°C to +85°C).

Technical Context

The device implements a dual-input multiplexer feeding five matched LVPECL output pairs, each with independent differential drive capability and controlled edge rates (Tr/Tf ≤150 ps). Input selection is determined by CLK_SEL logic level, while nEN provides synchronous output disable with defined logic states (Qx low / nQx high when asserted).

It supports mixed-voltage operation via separate VDD (2.375–3.6 V) and VEE (−0.5 V) rails, enabling level shifting between input and output domains. Input common-mode voltage ranges (VEE+0.5 V to VDD−0.85 V) accommodate LVPECL, LVDS, CML, HSTL, and HCSL sources without external biasing.

Key Specifications

Pinout & Package

TSSOP-20 package (173 mil width, Pb-free and RoHS-compliant), 0.65 mm pitch, JEDEC MO-153F/AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A and NB3N511MNR2G, the PI6C4911505-07LIE uniquely balances pure fanout simplicity, dual-input redundancy, synchronous enable, and ultra-low jitter-making it optimal for deterministic, high-channel-count clock distribution without synthesis overhead.

Availability

PI6C4911505-07LIE is available at Aetrix Electronics and suitable for 10G/25G Ethernet switch fabric, PCIe Gen4 reference clock distribution, and SyncE-compliant telecom timing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PI6C4911505-07LIE 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

Pericom Semiconductor (acquired by Diodes Incorporated in 2016) specialized in high-speed timing, interface, and signal-integrity solutions for networking, computing, and communications infrastructure.

The PI6C4911505-07LIE belongs to Pericom's high-frequency clock buffer product line, engineered specifically for low-jitter, multi-destination clock distribution in carrier-grade and enterprise-class data-path systems.

FAQ

What differential input standards does the PI6C4911505-07LIE support?

The PI6C4911505-07LIE accepts LVPECL, LVDS, CML, HSTL, and HCSL differential inputs directly-no external resistors or level shifters needed. Its input common-mode range (VEE+0.5 V to VDD−0.85 V) and differential amplitude specification (0.15 VPK-PK min) ensure interoperability with crystal oscillators, clock generators, and SerDes outputs across multiple voltage domains.

How is output skew managed across the five LVPECL channels?

Output-to-output skew is guaranteed ≤70 ps (typical), achieved through matched internal routing, symmetric driver design, and shared clock path architecture. The device uses a single internal clock tree feeding all five output pairs, minimizing process- and temperature-induced variation. This enables sub-100 ps skew across full industrial temperature range without calibration.

Can the PI6C4911505-07LIE drive HCSL loads directly?

Yes-the LVPECL outputs can drive HCSL inputs using an AC-coupled Thevenin termination: 450 Ω pull-up and 60 Ω pull-down generate a 0.4 V common-mode voltage matching HCSL requirements. This configuration presents a 50 Ω differential load and maintains signal integrity for short traces (<5 inches), as validated in Pericom application note 16-0016.

What is the recommended power supply decoupling strategy?

Each VDD pin (pins 18 and 20) requires a dedicated 0.1 µF ceramic capacitor placed adjacent to the pin on the component side of the PCB. For enhanced high-frequency noise suppression, add a 1 µF bulk capacitor near the device. Avoid shared vias or long traces-decoupling caps must connect directly to VDD and local ground plane with minimal loop area.