Skyworks Solutions Inc. 549BCJA002496CCG

Overview

549BCJA002496CCG from Skyworks Solutions is an I²C-programmable ultra-low-jitter crystal oscillator (XO) delivering 95 fs RMS phase jitter (12 kHz–20 MHz), programmable from 0.2 to 1500 MHz with <1 ppb resolution, and factory-configured for LVDS output, 3.3 V supply, ±20 ppm total stability, and –40 to +85 °C operation - used in 100G/400G optical Ethernet timing and FPGA clocking.

For engineers reviewing the 549BCJA002496CCG datasheet, 549BCJA002496CCG pinout, 549BCJA002496CCG application, or 549BCJA002496CCG equivalent, key selection criteria include I²C reprogrammability, differential LVDS output compatibility, PSNR of –83 dBc, startup frequency configuration, and 3.2×5 mm CLCC package footprint.

Technical Context

The 549BCJA002496CCG implements Skyworks' 4th-generation DSPLL® architecture with a fixed 152.6 MHz crystal reference, fractional feedback divider (FBDIV, 11.32-bit), integer high-speed divider (HSDIV, 5–2046), and power-of-2 low-speed divider (LSDIV, 1–32). It supports dynamic frequency changes via I²C at up to 1 Mbps (Fast Mode Plus).

On-chip power regulation provides –80 dBc typical PSNR; output enable (OE) and frequency select (FS) pins allow hardware-controlled startup mode selection; dual CMOS, LVPECL, HCSL, and CML options are supported across the same base part number via factory programming.

Key Specifications

Pinout & Package

549BCJA002496CCG uses a 3.2×5 mm 8-pin CLCC (ceramic leadless chip carrier) package with exposed pad for thermal dissipation and RoHS-compliant Au/Ni contact metallization (MSL Level 1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable oscillator applications.

Compared with 549BCJA002496CCG, the Si549BCJA002497CCG trades LVDS jitter advantage for CMOS simplicity, while the Si549ACJA002496CCG improves stability at the cost of higher unit price and longer qualification cycles - both require no PCB layout change but differ in system-level timing margin allocation.

Availability

549BCJA002496CCG is available at Aetrix Electronics and suitable for 100G/400G optical Ethernet, FPGA/ASIC clocking, and test & measurement equipment requiring stable component supply, fast prototyping turnaround, and guaranteed long-term availability.

Supply support for 549BCJA002496CCG 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

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and power management ICs for infrastructure, automotive, and mobile markets.

The Si549 family is designed for high-performance timing applications demanding field-programmable frequency agility, ultra-low jitter, and multi-voltage interoperability - targeting next-gen optical networking, AI accelerators, and high-speed test systems.

FAQ

What is the output format and supply voltage configuration of 549BCJA002496CCG?

The 549BCJA002496CCG is factory-configured for LVDS output and 3.3 V operation. It supports differential signaling with 100 Ω termination, 0.7 VPP swing, and operates across VDD = 3.135–3.465 V. This configuration is confirmed in Skyworks' Si549 ordering guide and electrical specifications table for Grade A stability devices with 3.2×5 mm packaging.

Does 549BCJA002496CCG support I²C reprogramming in-system?

Yes, 549BCJA002496CCG supports full in-system frequency reprogramming via its I²C interface at speeds up to 1 Mbps (Fast Mode Plus). The device retains its last programmed frequency across power cycles, and small frequency adjustments (<±950 ppm) settle in ≤100 μs without output glitches - verified in Table 2.2 of the official Si549 datasheet.

What is the phase jitter performance of 549BCJA002496CCG at 156.25 MHz?

At 156.25 MHz LVDS output, 549BCJA002496CCG delivers 95 fs RMS phase jitter (12 kHz–20 MHz), as specified in Table 2.3 of the Si549 datasheet. This value is typical and guaranteed by characterization - it meets OC-192 and 100GBASE-KR timing budgets and is validated using Agilent E5052B with differential-to-single-ended conversion.

How is frequency stability defined for 549BCJA002496CCG?

549BCJA002496CCG specifies ±20 ppm total stability, which includes temperature variation (–40 to +85 °C), initial accuracy, load pulling, supply voltage variation, and 20-year aging at 70 °C - per Note 2 in Table 2.1 of the Si549 datasheet. This Grade A stability rating is factory-programmed and laser-trimmed during final test.

What package type and thermal characteristics does 549BCJA002496CCG use?

549BCJA002496CCG uses a 3.2×5 mm 8-pin CLCC package with ΘJA = 55 °C/W (still air). Its thermal resistance junction-to-board (ΨJB) is 20 °C/W, enabling reliable operation up to 85 °C ambient with standard 4-layer PCB layouts - data sourced from Table 2.6 of the Si549 datasheet and confirmed for the "B" package code.