Skyworks Solutions Inc. 549CCJC002336CCG

Overview

549CCJC002336CCG from Skyworks Solutions is an I²C-programmable ultra-low-jitter crystal oscillator (XO) delivering 95 fs RMS phase jitter (12 kHz–20 MHz), factory-configured for 233.6 MHz output, 3.3 V supply, LVDS output format, ±20 ppm total frequency stability over –40 to +85 °C, and 3.2×5 mm CLCC package. It serves as a precision clock source in high-speed optical transport and FPGA timing systems.

For engineers reviewing the 549CCJC002336CCG datasheet, 549CCJC002336CCG pinout, 549CCJC002336CCG application, or 549CCJC002336CCG equivalent, this page provides verified electrical specs, validated pin functions, confirmed startup behavior, real-world PSNR performance (–83 dBc), and two field-validated alternative oscillators with documented functional trade-offs.

Technical Context

The 549CCJC002336CCG implements Skyworks' 4th-generation DSPLL® architecture with a fixed 152.6 MHz crystal reference, fractional FBDIV (11.32-bit), integer HSDIV (5–2046), and power-of-2 LSDIV (1–32) to synthesize 233.6 MHz. Its digital loop filter and on-chip power regulation deliver –83 dBc PSNR at 156.25 MHz under 50 mVpp supply ripple.

This device uses a single crystal + DSPLL IC approach-eliminating per-frequency crystal inventory-while supporting I²C reprogramming (100 kbps/400 kbps/1 Mbps) and pin-selectable startup frequencies. Output enable (OE) is active-high on Pin 2, and it operates across 1.8 V/2.5 V/3.3 V supplies with identical pinout and timing behavior.

Key Specifications

Pinout & Package

549CCJC002336CCG uses a 3.2×5 mm 8-pin ceramic leadless chip carrier (CLCC) with exposed pad (not electrically connected). Pin 1 is bottom-left corner when marking dot is top-left; top view shown in datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si540B-A2A5336M and MAX2679ETL+, the 549CCJC002336CCG uniquely combines field-programmability, ultra-low 95 fs jitter, multi-voltage support, and guaranteed –83 dBc PSNR-making it the only option qualified for next-gen 400G coherent modules and adaptive FPGA clocking architectures.

Availability

549CCJC002336CCG is available at Aetrix Electronics and suitable for 100G/400G optical transport, FPGA-based AI accelerators, broadcast video infrastructure, and test equipment requiring stable component supply with rapid prototyping support.

Supply support for 549CCJC002336CCG 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 communications, automotive, and industrial markets.

The Si549 Ultra Series™ is designed specifically for high-speed digital systems demanding ultra-low jitter, programmable frequency agility, and robust supply noise immunity-targeting 100G+ optical networking, AI/ML accelerators, and broadcast video infrastructure.

FAQ

What is the factory-programmed output frequency of the 549CCJC002336CCG?

The 549CCJC002336CCG is factory-programmed for a 233.6 MHz startup and default output frequency. This value is stored in non-volatile memory and persists across power cycles. The device retains full I²C programmability to reconfigure to any frequency between 0.2 MHz and 1500 MHz, including fractional values with <1 ppb resolution.

Does the 549CCJC002336CCG support 1.8 V operation?

Yes, the 549CCJC002336CCG supports 1.8 V, 2.5 V, and 3.3 V supply voltages from the same part number. When operated at 1.8 V, its LVDS output maintains 0.7 VPP swing with 0.9 V common-mode voltage (per Table 2.1), and supply current drops to 83–121 mA (enabled). No hardware modification or external level shifting is required.

What is the meaning of "CCG" in the 549CCJC002336CCG part number?

In the Skyworks Si549 ordering scheme, "CCG" denotes: C = 3.2×5 mm package, C = LVDS output format, G = ±20 ppm total frequency stability grade. The full suffix confirms this device is a 3.2×5 mm LVDS oscillator with ±20 ppm stability, configured for 233.6 MHz and shipped with OE active-high on Pin 2.

Can the 549CCJC002336CCG replace a fixed-frequency crystal oscillator on an existing PCB?

Yes-the 549CCJC002336CCG uses industry-standard 3.2×5 mm CLCC footprint and pinout. It matches mechanical dimensions, thermal profile (ΘJA = 55 °C/W), and electrical interface (LVDS differential outputs, 3.3 V supply) of legacy XOs. No PCB redesign is needed, though I²C lines (SDA/SCL) should be routed if future reprogramming is planned.

What is the power-up behavior of the 549CCJC002336CCG?

The 549CCJC002336CCG achieves stable 233.6 MHz output within 10 ms after VDD reaches 0.9 × 3.3 V (3.0 V), per Table 2.1. Output enable (Pin 2) is active-high with internal 50 kΩ pull-up, so the clock starts automatically at power-on unless externally held low. Tristate current is 73–112 mA when disabled.