Skyworks Solutions Inc. 544BCJB002155BBGR

Overview

544BCJB002155BBGR from Skyworks Solutions is an I²C-programmable ultra-low-jitter crystal oscillator (XO) delivering 150 fs RMS phase jitter (12 kHz–20 MHz), factory-configured for 155.52 MHz output, LVDS format, 3.3 V supply, ±10 ppm total stability, and 3.2×5 mm CLCC package. It serves as a high-precision clock source for 100G OTN line cards and FPGA-based coherent optical modules requiring stable, low-noise timing under noisy power conditions.

For engineers reviewing the 544BCJB002155BBGR datasheet, 544BCJB002155BBGR pinout, 544BCJB002155BBGR application, or 544BCJB002155BBGR equivalent, this page delivers verified electrical specs, validated pin functions, confirmed startup frequency behavior, real-world PSNR performance (−83 dBc), and two field-deployed alternative oscillators with documented functional trade-offs.

Technical Context

The 544BCJB002155BBGR implements Skyworks' 4th-generation DSPLL® architecture with a fixed 55.05 MHz crystal reference, fractional feedback divider (FBDIV), and dual-stage integer output dividers (HSDIV/LSDIV). Its digital loop filter and on-chip power supply regulation enable <1 ppb frequency resolution and −83 dBc PSNR at 156.25 MHz under 50 mVpp ripple.

It supports I²C reprogramming at 100 kbps/400 kbps/1 Mbps, features pin-selectable startup frequencies (dual-FS option), and integrates configurable OE polarity and output format selection-all stored in on-chip NVM and factory-programmed prior to shipment.

Key Specifications

Pinout & Package

544BCJB002155BBGR uses a 3.2×5 mm 8-pin ceramic leadless chip carrier (CLCC) package with gull-wing terminations and moisture sensitivity level (MSL) 3. Pin functions are validated per Skyworks Si544 Data Sheet Rev 206612A (May 2023).

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si542BCJB002155BBGR and DS3202ZQ+T, the 544BCJB002155BBGR uniquely combines field-reprogrammable frequency, 150 fs jitter, and ±10 ppm total stability in a 3.2×5 mm footprint-making it optimal for next-gen optical transport systems needing both precision and flexibility.

Availability

544BCJB002155BBGR is available at Aetrix Electronics and suitable for 100G OTN line cards, FPGA-based coherent optics, and high-density switch fabric applications requiring stable component supply, fast prototyping turnaround, and guaranteed long-term continuity.

Supply support for 544BCJB002155BBGR 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 leader in analog semiconductors, specializing in RF, mobile, infrastructure, and timing solutions with >30 years of oscillator innovation.

The Si544 product line was engineered specifically for high-speed optical networking and datacenter infrastructure, delivering programmable, ultra-low-jitter timing in compact packages with rapid custom-frequency fulfillment.

FAQ

What is the factory-programmed startup frequency of 544BCJB002155BBGR?

The 544BCJB002155BBGR is factory-configured for a 155.52 MHz startup frequency, matching the OTU2 line rate standard. This frequency is active immediately upon power-up before any I²C command is issued. The device retains this value in non-volatile memory and resumes it after power cycling. Secondary frequencies can be selected via the FS0 pin, but the default remains 155.52 MHz unless reprogrammed via I²C interface.

Does 544BCJB002155BBGR support LVDS output at 155.52 MHz with guaranteed jitter performance?

Yes, 544BCJB002155BBGR is specified for 155.52 MHz LVDS output with 150 fs RMS phase jitter (12 kHz–20 MHz), measured per JEDEC Standard JESD65B. This value is guaranteed across −40 °C to +85 °C and 3.3 V ±5% supply, with typical PSNR of −83 dBc under 50 mVpp 100 kHz power supply ripple. The datasheet confirms LVDS operation up to 1500 MHz, and 155.52 MHz falls well within the optimized range for lowest jitter.

What is the meaning of "BBGR" in the 544BCJB002155BBGR part number?

In Skyworks' Si544 ordering nomenclature, "BBGR" decodes as follows: "B" = Speed Grade B (0.2–800 MHz), "B" = Temperature grade −40 to +85 °C, "G" = ±10 ppm total stability, "R" = Tape-and-reel packaging. The full code confirms the device is configured for 155.52 MHz, LVDS output, 3.3 V supply, dual-FS pinout, and 3.2×5 mm CLCC package-matching the electrical and mechanical specifications shipped.

Can 544BCJB002155BBGR be reprogrammed in-system via I²C after soldering?

Yes, 544BCJB002155BBGR supports full in-system I²C reprogramming at 100 kbps, 400 kbps, or 1 Mbps (Fast Mode Plus). All frequency, output format, and control register settings-including new startup frequencies and I²C slave address-can be updated dynamically without power cycling. Reprogramming takes ≤100 μs for small changes (<±950 ppm) and ≤40 ms for large changes, including internal VCO recalibration. No external hardware programmer is needed.

What is the power-up behavior of 544BCJB002155BBGR when OE is asserted low?

When OE is held low during power-up, 544BCJB002155BBGR enters tristate mode immediately upon reaching 0.9×VDD and maintains CLK+/CLK− in high-impedance state until OE is released high. Output enable time (TE) is guaranteed ≤20 μs after OE goes high, and the output reaches final frequency accuracy within 10 ms of VDD stabilization. This behavior allows safe clock gating during FPGA configuration or processor boot sequences.