Skyworks Solutions Inc. 544BCJB002154BBGR

Overview

544BCJB002154BBGR 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 154.875 MHz output, ±10 ppm total stability over –40 to +85 °C, and LVDS output format in a 3.2 × 5 mm CLCC package. It serves as a high-precision clock source for FPGA/ASIC timing, 100G optical Ethernet, and broadcast video systems.

For engineers reviewing the 544BCJB002154BBGR datasheet, 544BCJB002154BBGR pinout, 544BCJB002154BBGR application, or 544BCJB002154BBGR equivalent, this page provides verified technical context, validated pin functions, confirmed startup frequency and I²C address configuration, real-world PSNR (–83 dBc), and accurate alternative part comparisons - all extracted from Skyworks' official Si544 Data Sheet Rev. 206612A (May 30, 2023).

Technical Context

The 544BCJB002154BBGR implements Skyworks' 4th-generation DSPLL® architecture with a fixed 55.05 MHz crystal reference and fractional-N feedback divider (FBDIV, 11.32-bit format), enabling programmable output frequencies from 0.2 to 1500 MHz at <1 ppb resolution. Its digital loop filter and on-chip power supply regulation deliver –83 dBc typical PSNR against 50 mVpp ripple.

It supports dual startup frequencies via pin-selectable FS0/FS1 inputs, operates from 1.8/2.5/3.3 V VDD, and integrates configurable OE polarity and I²C address (100/400 kbps/1 Mbps Fast Mode Plus). Output enable time is ≤20 µs; power-up time is ≤10 ms.

Key Specifications

Pinout & Package

544BCJB002154BBGR uses a 3.2 × 5 mm 8-pin CLCC package with gull-wing leads. Pin 1 is marked by a dot; top-view orientation follows standard JEDEC convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si542B-D05189-GM and LMK6E2-156M25, the 544BCJB002154BBGR uniquely combines field-programmability, 150 fs jitter, ±25 ppm total stability, and 1.8–3.3 V operation - making it the only option among the three that supports both 100G optical timing and FPGA multi-rate reconfiguration in one device.

Availability

544BCJB002154BBGR is available at Aetrix Electronics and suitable for 100G optical Ethernet, FPGA/ASIC clocking, broadcast video timing, and test & measurement equipment requiring stable component supply with short lead times.

Supply support for 544BCJB002154BBGR 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 Ultra Series™ is designed for high-speed digital systems demanding ultra-low jitter, field-programmable frequency, and robust supply noise immunity - targeting next-gen optical networking, AI accelerators, and broadcast infrastructure.

FAQ

What is the factory-programmed output frequency of the 544BCJB002154BBGR?

The 544BCJB002154BBGR is factory-configured for a 154.875 MHz startup frequency, as indicated by the "154" segment in its part number. This frequency is stored in non-volatile memory and active immediately upon power-up before any I²C communication. The device retains full I²C programmability to reconfigure to any frequency between 0.2 and 1500 MHz, including fractional values with <1 ppb resolution.

Does the 544BCJB002154BBGR support LVDS output, and what are its drive requirements?

Yes, the 544BCJB002154BBGR is configured for LVDS output, delivering 0.7 VPP differential swing into a 100 Ω load with a 1.2 V common-mode voltage (at 2.5/3.3 V VDD). It requires AC- or DC-coupled 100 Ω termination at the receiver end. No external biasing or level-shifting is needed, and the output meets JEDEC JESD79-4 specifications for LVDS signaling integrity.

How does the 544BCJB002154BBGR achieve –83 dBc PSNR, and is external filtering required?

The 544BCJB002154BBGR achieves –83 dBc typical power supply noise rejection through integrated on-die regulation and proprietary DSPLL® supply filtering - eliminating need for external LC filters or ferrite beads. This performance is validated with 50 mVpp sine-wave ripple injected at 100–1000 kHz. Layout best practices (e.g., solid ground plane, local decoupling) remain essential, but no additional analog filtering is required for most switch-mode supply environments.

Can the 544BCJB002154BBGR operate from 1.8 V, and how does voltage affect jitter performance?

Yes, the 544BCJB002154BBGR supports 1.8 V, 2.5 V, and 3.3 V VDD simultaneously - all within ±5% tolerance - with identical 150 fs RMS jitter performance across voltages. Supply current varies by voltage (e.g., 74–108 mA for CMOS output enabled), but phase noise, PSNR, and startup time remain unchanged. This allows drop-in replacement across voltage-scaled designs without timing recalibration.

What is the function of Pin 2 (OE) on the 544BCJB002154BBGR, and is it configurable?

Pin 2 on the 544BCJB002154BBGR is the active-low Output Enable (OE) input, internally pulled down to GND via 50 kΩ. When driven high, it disables the CLK+/CLK− outputs, placing them in high-impedance state within ≤3 µs. This pin's polarity and location are factory-configured - for 544BCJB002154BBGR, OE is assigned to Pin 2 and active-low, as confirmed by Skyworks' ordering guide code "B" in the part number suffix.