Skyworks Solutions Inc. 549CCEC002403BCG

Overview

549CCEC002403BCG from Skyworks Solutions is an I²C-programmable ultra-low-jitter crystal oscillator (XO) delivering user-defined frequencies from 0.2 to 1500 MHz with <1 ppb resolution. It features 95 fs typical RMS phase jitter (12 kHz–20 MHz), ±20 ppm total frequency stability over –40 to +85 °C, and supports LVPECL, LVDS, CML, HCSL, CMOS, and Dual CMOS output formats in a 3.2×5 mm CLCC package. It is deployed in high-speed optical networking and FPGA clocking where deterministic low-jitter timing is critical.

For engineers reviewing the 549CCEC002403BCG datasheet, 549CCEC002403BCG pinout, 549CCEC002403BCG application, or 549CCEC002403BCG equivalent, this page delivers verified technical context, validated pin functions, confirmed output format and supply voltage compatibility (1.8/2.5/3.3 V), real-world jitter performance data, and two factory-validated alternative oscillators for design flexibility.

Technical Context

The 549CCEC002403BCG implements Skyworks' 4th-generation DSPLL® architecture with a fixed 152.6 MHz crystal reference and fractional-N feedback divider (FBDIV, 11.32-bit format), high-speed integer divider (HSDIV, 5–2046), and power-of-2 low-speed divider (LSDIV, 1–32). Its digital loop filter and on-chip power supply regulation deliver –80 dBc typical PSNR and eliminate external filtering in noisy SMPS environments.

It supports up to four pin-selectable startup frequencies via OE/FS pins, I²C reprogramming at 100 kbps/400 kbps/1 Mbps (Fast Mode Plus), and factory configuration of output format, I²C address, and OE polarity - enabling rapid custom-frequency sampling within 1–2 weeks without crystal change.

Key Specifications

Pinout & Package

549CCEC002403BCG uses a 3.2×5 mm 8-pin CLCC package with gold-plated Ni underlayer contact pads (MIL-STD-883 qualified, MSL Level 3). Pinout is standardized across Si549 variants and validated per Skyworks datasheet Figure 1 (Top View).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 549CCEC002403BCG, the Si545BCC002403BCG trades 30 fs of jitter for lower cost and reduced frequency range, while the Si5341-B-GM adds multi-output flexibility and JESD204B support at the expense of size, complexity, and non-drop-in replacement.

Availability

549CCEC002403BCG is available at Aetrix Electronics and suitable for 400G optical transceivers, FPGA-based AI accelerators, and test equipment requiring stable component supply, guaranteed long-term availability, and traceable lot-level documentation.

Supply support for 549CCEC002403BCG 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 Ultra Series™ is engineered for high-speed digital systems demanding ultra-low jitter, field-programmable frequency agility, and robust supply noise immunity - targeting next-gen optical networking, AI compute, and precision instrumentation.

FAQ

What output frequency range does the 549CCEC002403BCG support?

The 549CCEC002403BCG supports 0.2 to 1500 MHz for LVPECL, LVDS, and CML outputs; 0.2 to 400 MHz for HCSL; and 0.2 to 250 MHz for CMOS and Dual CMOS outputs. All frequencies are programmable via I²C with <1 ppb resolution. The actual usable range depends on selected output format and supply voltage, as specified in Table 2.1 of the official Skyworks Si549 datasheet.

Does the 549CCEC002403BCG require external configuration after power-up?

No - the 549CCEC002403BCG ships pre-programmed with factory-set parameters including startup frequency, output format, I²C address, and OE/FS pin polarity. It begins operating immediately upon power-up. I²C reprogramming is optional and used only for dynamic frequency changes during system runtime, not for initial configuration.

What is the total frequency stability specification for the 549CCEC002403BCG?

The 549CCEC002403BCG has a total frequency stability of ±20 ppm over –40 to +85 °C. This value includes temperature variation, initial calibration accuracy, load pulling, supply voltage variation, and 20-year aging at 70 °C - as defined in Skyworks datasheet Section 2.1, Note 1.

Can the 549CCEC002403BCG operate from a 1.8 V supply?

Yes - the 549CCEC002403BCG operates from 1.8 V, 2.5 V, or 3.3 V supplies (±5%), with identical jitter and stability performance across all rails. Supply voltage is selected at factory configuration; no external components or board changes are needed to support multi-voltage operation.

How many pins does the 549CCEC002403BCG use for its I²C interface?

The 549CCEC002403BCG uses two dedicated pins for I²C communication: Pin 7 (SDA) and Pin 8 (SCL). Both pins support standard, fast, and Fast Mode Plus speeds up to 1 Mbps, and require external pull-up resistors per I²C bus specifications.