Diodes Incorporated PI6C4911510FAIE

Overview

PI6C4911510FAIE from Pericom Semiconductor is a 1-to-10 differential LVPECL fanout buffer with dual selectable differential clock inputs (CLK0/CLK1), 1.5 GHz max frequency, <0.03 ps typical additive jitter, and 40 ps typical output skew. It supports LVPECL, LVDS, CML, and SSTL input levels and operates from 2.5 V ±5% or 3.3 V ±10% core/output supplies across –40°C to +85°C - used in high-speed clock distribution for FPGA, ASIC, and SerDes timing systems.

For engineers reviewing the PI6C4911510FAIE datasheet, PI6C4911510FAIE pinout, PI6C4911510FAIE application, or PI6C4911510FAIE equivalent, key selection criteria include differential input mux control (CLK_SEL), LVPECL output termination requirements (50 Ω to VDDO–2.0 V), supply separation (VDD/VDDO/VEE), thermal resistance (ΘJA = 86 °C/W for TQFP), and compatibility with low-noise SaRonix-eCera oscillators.

Technical Context

The PI6C4911510 implements a 2:1 differential clock multiplexer feeding a low-skew fanout stage with ten matched LVPECL output pairs. Its internal biasing supports single-ended input conversion via external VDD/2 reference, and its dual power domains (VDD for core logic, VDDO for outputs, VEE for LVPECL common-mode) enable independent supply optimization.

Output timing integrity is maintained through matched trace routing on-die and strict layout guidance: each power pin requires dedicated 0.1 µF + 1 µF bypassing, and LVPECL outputs must terminate differentially to VDDO–2.0 V. Additive jitter is measured RMS over 12 kHz–20 MHz (27 fs typical), validated against phase noise subtraction methodology.

Key Specifications

Pinout & Package

PI6C4911510FAIE is packaged in a Pb-free, green 32-pin Thin Quad Flat Package (TQFP, code FA), 7 mm × 7 mm, 0.8 mm pitch, with exposed thermal pad (no E-pad variant specified for FAIE suffix). Package thermal resistance is ΘJA = 86 °C/W (still air).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS85310AMLF and PI6C4911508FAIE, the PI6C4911510FAIE uniquely delivers both 10-output capacity and hardware-selectable dual inputs within the same low-jitter, multi-standard interface envelope - making it optimal for fault-tolerant, high-density timing architectures.

Availability

PI6C4911510FAIE is available at Aetrix Electronics and suitable for 5G infrastructure, FPGA-based prototyping, and optical transport equipment requiring stable component supply, long-lifecycle support, and Pb-free/Green compliance.

Supply support for PI6C4911510FAIE 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 2017) specialized in high-performance timing, interface, and signal-integrity solutions for communications, computing, and industrial markets.

The PI6C49115xx family targets high-speed clock distribution in systems demanding ultra-low jitter, multi-standard input compatibility, and robust thermal performance - especially in dense, thermally constrained PCB layouts.

FAQ

What input termination is required for LVDS signals on CLK0/CLK1?

LVDS inputs require 100 Ω differential termination across CLK0 and /CLK0 (or CLK1 and /CLK1) at the PI6C4911510FAIE input pins. No external biasing is needed - the device's internal termination and common-mode range (VEE+0.5 V to VDD) accommodate standard LVDS voltage swings directly.

Can PI6C4911510FAIE drive unterminated LVPECL loads?

No. All LVPECL outputs (Q0–Q9) must be terminated differentially with 50 Ω to VDDO–2.0 V per pair. Unterminated or incorrectly terminated outputs cause signal reflection, degraded swing, increased jitter, and potential damage due to improper DC biasing of the emitter-coupled output stage.

Is VBB (Pin 5) required to be connected for single-ended input operation?

No. VBB is an internal common-mode node and must remain unconnected (NC) per datasheet. For single-ended input, external resistive divider (R1/R2) generates VDD/2 bias at /CLK0 or /CLK1 - VBB plays no role in that configuration and should not be routed or soldered.

How does thermal performance differ between FA (TQFP) and ZH (QFN) packages?

The FA package (PI6C4911510FAIE) has ΘJA = 86 °C/W (still air), while the ZH QFN variant achieves ΘJA = 44.7 °C/W due to superior thermal conduction via its exposed pad. For high-power or compact layouts, ZH reduces junction temperature rise by ~45%, improving long-term reliability and jitter stability under continuous 1.5 GHz operation.