Skyworks Solutions Inc. 541BAA001018BAG

Overview

541BAA001018BAG from Skyworks Solutions is an ultra-low-jitter dual-output crystal oscillator (XO) based on 4th-generation DSPLL® technology, delivering two factory-programmed frequencies between 0.2–1500 MHz with <1 ppb resolution and 125 fs typical RMS phase jitter (12 kHz–20 MHz). It supports LVPECL/LVDS/CML/HCSL/CMOS/Dual CMOS outputs, operates from 1.8/2.5/3.3 V, and is used in high-speed optical networking and FPGA clocking.

For engineers reviewing the 541BAA001018BAG datasheet, 541BAA001018BAG pinout, 541BAA001018BAG application, or 541BAA001018BAG equivalent, key selection criteria include dual-frequency flexibility, sub-150 fs jitter performance, ±7 ppm temperature stability (Grade C), 2.5×3.2 mm package footprint, and OE/FS pin control for output enable and frequency selection.

Technical Context

The 541BAA001018BAG implements a digital fractional-N DSPLL architecture with integrated DCO, digital phase detector, and loop filter - enabling precise synthesis of both integer and fractional frequencies without external components. Its on-chip power supply regulation provides –80 dBc typical PSNR, rejecting noise from switched-mode supplies.

Factory-programmed configuration includes dual output frequencies, output format (LVPECL/LVDS/etc.), OE pin polarity/location, and total stability grade (±7 ppm). The device uses a single fixed-frequency crystal and achieves 100% electrical test coverage, eliminating crystal-bin dependency and long lead times typical of traditional XOs.

Key Specifications

Pinout & Package

541BAA001018BAG is housed in a 2.5×3.2 mm 6-pin DFN package with exposed pad (thermal path to PCB), compliant with JEDEC MO-229 and IPC-7351 standards. Pin 1 is marked by a dot; land pattern requires NSMD pads with 60 µm solder mask clearance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output oscillator applications.

Compared with Si540BAA001018BAG and MAX2680AUB+T, the 541BAA001018BAG uniquely delivers two independently programmable, ultra-low-jitter outputs in a single 2.5×3.2 mm package with factory-set stability and PSNR - making it optimal for space-constrained, multi-clock digital systems where timing integrity is critical.

Availability

541BAA001018BAG is available at Aetrix Electronics and suitable for 100G/400G optical transport, FPGA/ASIC clocking, broadcast video, and high-performance server applications requiring stable component supply, fast prototyping cycles, and long-term lifecycle continuity.

Supply support for 541BAA001018BAG 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 and mixed-signal semiconductors, specializing in RF, timing, and connectivity solutions for infrastructure, automotive, and industrial markets.

The Si541 Ultra Series™ is designed specifically for high-speed digital systems demanding ultra-low jitter, dual-frequency flexibility, and robust power supply noise immunity - targeting next-generation optical networking, AI accelerators, and broadcast equipment.

FAQ

What output formats does the 541BAA001018BAG support?

The 541BAA001018BAG supports LVPECL, LVDS, CML, HCSL, CMOS, and Dual CMOS (in-phase or complementary) output formats. The specific format is factory-programmed at shipment and cannot be changed in-circuit. Dual CMOS allows simultaneous identical-frequency outputs with matched phase alignment, useful for driving multiple clock domains from one device.

How is frequency selection implemented on the 541BAA001018BAG?

Frequency selection on the 541BAA001018BAG is controlled via the FS (Frequency Select) pin - a hardware-configurable input that toggles between the two factory-programmed output frequencies. When FS = 0, the first frequency is active; when FS = 1, the second frequency is active. Settling time after FS change is guaranteed ≤10 ms per datasheet Table 2.1.

What is the power supply noise rejection (PSNR) performance of the 541BAA001018BAG?

The 541BAA001018BAG delivers –80 dBc typical power supply noise rejection (PSNR), measured with 50 mVpp ripple injected at 100–1000 kHz on the VDD rail while outputting 156.25 MHz LVDS. This on-chip filtering eliminates need for external LDOs in systems powered by switched-mode supplies, simplifying PDN design and reducing bill-of-materials cost.

Can the 541BAA001018BAG operate from 1.8 V, 2.5 V, and 3.3 V simultaneously?

No - the 541BAA001018BAG operates from a single VDD supply rail, but that rail may be 1.8 V, 2.5 V, or 3.3 V ±5%. The same part number supports all three voltages; voltage selection is determined by the system's power delivery design, not by programming. Output swing and drive strength scale accordingly per Table 2.1 in the datasheet.

What is the thermal resistance (ΘJA) of the 541BAA001018BAG in its 2.5×3.2 mm package?

The 541BAA001018BAG in the 2.5×3.2 mm 6-pin DFN package has a thermal resistance ΘJA of 80 °C/W under still-air conditions at 85 °C ambient, per Table 2.5. Its ΨJB (junction-to-board) is 39 °C/W, indicating efficient heat transfer to the PCB via the exposed thermal pad - critical for sustained operation in thermally dense FPGA or switch ASIC designs.