Diodes Incorporated PI6C4911510-05FAIE

Overview

PI6C4911510-05FAIE from Pericom Semiconductor is a 1-to-10 low-skew differential clock fanout buffer supporting LVPECL/ECL outputs, dual selectable differential inputs (CLK0/nCLK0 or CLK1/nCLK1), 1.5 GHz max frequency, <0.03 ps typical additive jitter, and synchronous output enable (SYNC_OE). It operates from 2.5 V or 3.3 V supplies and serves high-integrity clock distribution in telecom line cards and FPGA-based test equipment.

For engineers reviewing the PI6C4911510-05FAIE datasheet, PI6C4911510-05FAIE pinout, PI6C4911510-05FAIE application, or PI6C4911510-05FAIE equivalent, key selection criteria include input compatibility with LVPECL/LVDS/CML/SSTL, output skew ≤55 ps, sync-controlled output gating, dual-input selection via CLK_SEL, and TQFP-32 packaging for dense PCB layouts.

Technical Context

The device implements a fully differential signal path with non-inverting polarity translation from differential or single-ended inputs to ten matched LVPECL output pairs. Input selection is controlled by a CMOS-level CLK_SEL pin with internal 50 kΩ pull-down, enabling dynamic routing between two independent clock sources without external logic.

SYNC_OE provides synchronous output enable/disable: when asserted HIGH, outputs follow input timing with propagation delay of 1200–2100 ps; when LOW, Q+ outputs are forced low and Q− outputs forced high-preserving deterministic state during clock gating. All outputs share common VDDO pins and are terminated to VDDO − 2.0 V per LVPECL standard.

Key Specifications

Pinout & Package

Package: Pb-free & Green 32-pin Thin Quad Flat Package (TQFP), 7 mm × 7 mm body, 0.8 mm pitch, JEDEC MS-026D/ABA compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N286A and Si53302-B-GM, the PI6C4911510-05FAIE delivers optimal balance of low skew (≤55 ps), minimal additive jitter (0.03 ps), and zero-config operation-ideal for fixed-frequency, high-reliability fanout where simplicity and deterministic behavior outweigh programmability needs.

Availability

PI6C4911510-05FAIE is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA-based instrumentation, high-density network switches, and PCIe Gen4 reference clock distribution requiring stable component supply and long-term lifecycle support.

Supply support for PI6C4911510-05FAIE 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 was a fabless provider of high-speed timing, interface, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its clock buffer portfolio remains widely deployed in industrial and communications systems.

The PI6C4911510-05FAIE belongs to Pericom's low-skew LVPECL fanout buffer product line, engineered specifically for deterministic, jitter-sensitive clock distribution in multi-gigabit serial data systems.

FAQ

What input standards does the PI6C4911510-05FAIE support?

The device accepts LVPECL, LVDS, CML, and SSTL input levels on both CLK0/nCLK0 and CLK1/nCLK1 differential pairs. Single-ended operation is also supported by biasing the complementary input to VDD/2, enabling compatibility with crystal oscillator outputs and other single-ended clock sources without external components.

How does SYNC_OE affect output behavior?

When SYNC_OE is HIGH, outputs replicate the selected input clock with 1200–2100 ps propagation delay. When LOW, all Q+ outputs are driven low and all Q− outputs driven high-guaranteeing a known, static state without glitches or metastability, critical for safe clock gating in test and measurement systems.

Can PI6C4911510-05FAIE operate with only one supply voltage?

Yes-VDD and VDDO may be tied together if a single 2.5 V or 3.3 V rail is used. However, separating them improves noise isolation: VDD powers input receivers and logic, while VDDO powers LVPECL drivers, reducing coupling between sensitive input stages and high-current output stages.

What is the recommended termination for LVPECL outputs?

Each LVPECL output pair requires 50 Ω series termination to VDDO − 2.0 V. This matches the standard LVPECL DC bias point and ensures correct common-mode voltage (≈VDDO − 1.3 V) and differential swing (≥600 mV), as verified in AC characteristics tables and application schematics.