Skyworks Solutions Inc. 544AAJC001967BCGR

Overview

544AAJC001967BCGR from Skyworks Solutions is an I²C-programmable ultra-low-jitter crystal oscillator (XO) delivering 150 fs RMS phase jitter (12 kHz–20 MHz), programmable from 0.2 to 1500 MHz with <1 ppb resolution, and supporting LVPECL/LVDS/CML/HCSL/CMOS/Dual CMOS outputs in a 3.2×5 mm CLCC package. It serves as a high-stability, reconfigurable clock source for FPGA/ASIC timing, 100G–400G optical Ethernet, and broadcast video systems.

For engineers reviewing the 544AAJC001967BCGR datasheet, 544AAJC001967BCGR pinout, 544AAJC001967BCGR application, or 544AAJC001967BCGR equivalent, this page delivers verified electrical specs, factory-configured startup behavior, I²C interface timing, PSNR (–83 dBc), and package-specific thermal resistance (ΘJA = 55 °C/W) - all confirmed for the exact 544AAJC001967BCGR variant.

Technical Context

The 544AAJC001967BCGR implements Skyworks' 4th-generation DSPLL® architecture with a fixed 55.05 MHz crystal reference, fractional FBDIV (11.32-bit), integer HSDIV (5–2046), and power-of-2 LSDIV (1–32). Its digital loop filter and on-chip power supply regulation enable <150 fs jitter across integer/fractional frequencies while rejecting –83 dBc of 100–1000 kHz supply noise.

Factory-programmed at shipment, the device supports up to four pin-selectable startup frequencies, user-defined I²C address, OE/FS pin polarity/location, and output format selection - eliminating custom crystal procurement and enabling 1–2 week sample delivery without design iteration.

Key Specifications

Pinout & Package

544AAJC001967BCGR uses an 8-pin 3.2×5 mm ceramic leadless chip carrier (CLCC) package with gull-wing terminations, moisture sensitivity level (MSL) 3, and Au/Ni contact pads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si542AC000113DG and Si570ACD000117DG, the 544AAJC001967BCGR delivers superior jitter (150 fs vs. ≥1.3 ps), broader frequency range (1500 MHz), factory-configurable startup behavior, and better thermal performance (55 °C/W vs. 80 °C/W) in its 3.2×5 mm form factor - making it optimal for next-gen optical and compute infrastructure.

Availability

544AAJC001967BCGR is available at Aetrix Electronics and suitable for 100G–400G optical transport, FPGA/ASIC clocking, and broadcast video timing applications requiring stable component supply, fast sampling, and long-term lifecycle continuity.

Supply support for 544AAJC001967BCGR 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.

The Si544 family is engineered for high-performance, software-defined clocking in optical networking, data center switching, and broadcast infrastructure - delivering programmability, ultra-low jitter, and rapid customization without crystal dependency.

FAQ

What output formats does the 544AAJC001967BCGR support?

The 544AAJC001967BCGR supports LVPECL, LVDS, CML, HCSL, CMOS, and Dual CMOS output formats. Factory configuration determines the active format at shipment; Dual CMOS provides either in-phase or complementary 0.2–250 MHz outputs. Format selection is fixed per unit and cannot be changed post-shipment without reprogramming via I²C - though not all combinations are supported simultaneously due to driver limitations.

Does the 544AAJC001967BCGR require external configuration after power-up?

No - the 544AAJC001967BCGR boots into a factory-programmed startup frequency and I²C address. It begins oscillating within 10 ms of VDD reaching 0.9× rail. I²C reprogramming is optional and used only for dynamic frequency changes during operation; default behavior requires zero external configuration for immediate clock availability.

What is the maximum output frequency for each signal format on the 544AAJC001967BCGR?

Maximum output frequencies are format-dependent: LVPECL/LVDS/CML support up to 1500 MHz; HCSL supports up to 400 MHz; CMOS and Dual CMOS are rated to 250 MHz. These limits are enforced by driver design and are specified in Table 2.1 of the official Si544 datasheet - exceeding them may cause waveform degradation or noncompliance with rise/fall time specs.

How does the 544AAJC001967BCGR achieve –83 dBc PSNR?

The 544AAJC001967BCGR achieves –83 dBc typical power supply noise rejection through integrated on-die LDO-like regulation and digital supply noise cancellation circuitry within its DSPLL core. This design rejects 100–1000 kHz ripple without requiring external filtering components, enabling robust operation directly from switched-mode power supplies commonly found in dense server and optical line card designs.

Can the 544AAJC001967BCGR replace a fixed-frequency crystal oscillator?

Yes - the 544AAJC001967BCGR is pin-compatible with standard 3.2×5 mm XO footprints and operates as a drop-in replacement for many fixed-frequency oscillators. However, it requires connection to an I²C bus for initial setup or reprogramming; if I²C is unused, the device defaults to its factory-programmed startup frequency and functions identically to a conventional XO with enhanced stability and jitter performance.