Skyworks Solutions Inc. SI5350A-B04041-GMR

Overview

SI5350A-B04041-GMR from Skyworks Solutions is a factory-programmed, pin-controlled CMOS clock generator with 4 outputs in a 16-QFN (3×3 mm) package. It synthesizes any frequency from 2.5 kHz to 200 MHz per output with 0 ppm error using a 25 or 27 MHz crystal reference, supports per-output spread spectrum, and delivers <70 ps pk-pk period jitter. It replaces multiple crystals and oscillators in audio/video and networking equipment.

For engineers reviewing the SI5350A-B04041-GMR datasheet, SI5350A-B04041-GMR pinout, SI5350A-B04041-GMR application, or SI5350A-B04041-GMR equivalent, key selection considerations include its 4-output 16-QFN configuration, factory-programmed frequency plan, per-output spread spectrum enable, glitchless frequency switching via FS pins, and HCSL-compatible swing support at 2.5 V VDDO.

Technical Context

The SI5350A-B04041-GMR implements a dual-PLL + eight fractional MultiSynth architecture, enabling independent synthesis of up to four non-integer-related frequencies simultaneously. Each output uses a dedicated high-resolution fractional divider for exact frequency generation without rounding error.

It operates from a single fixed-frequency crystal (25 or 27 MHz), supports static phase offset control, and allows per-output rise/fall time tuning and invert/non-invert selection. Spread spectrum is available only on PLLA-synchronized outputs and configurable via SSEN pin or register setting.

Key Specifications

Pinout & Package

SI5350A-B04041-GMR is housed in a 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Skyworks Rev. 1.2 datasheet Section 7.2 and Figure 4 (16-QFN block diagram).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with SI5350A-B-GM1 and Si5351A-B-GM1, SI5350A-B04041-GMR offers guaranteed factory-programmed timing performance, eliminates I²C bus overhead and configuration firmware, and provides deterministic glitchless switching via hardware FS pins - making it optimal for cost-sensitive, high-volume embedded designs.

Availability

SI5350A-B04041-GMR is available at Aetrix Electronics and suitable for audio/video equipment, networking PHY interfaces, and printer/scanner timing applications requiring stable component supply, long-term lifecycle assurance, and factory-verified frequency accuracy.

Supply support for SI5350A-B04041-GMR 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 for wireless, broadband, automotive, and industrial markets.

The Si5350A family is designed as a factory-programmable, pin-controlled clock generator targeting cost-sensitive applications that require replacement of multiple crystals and oscillators with a single, jitter-optimized, low-power solution.

FAQ

What is the reference crystal requirement for SI5350A-B04041-GMR?

The SI5350A-B04041-GMR requires a 25 MHz or 27 MHz fundamental-mode AT-cut crystal with load capacitance of 6–12 pF and ESR ≤150 Ω. Internal load capacitors (0/6/8/10 pF) are configurable via ClockBuilder Pro; external caps ≤2 pF may be added if needed. The crystal connects directly to XA/XB pins - no external oscillator input is supported for this variant.

Does SI5350A-B04041-GMR support HCSL-compatible outputs?

Yes, SI5350A-B04041-GMR supports HCSL-compatible swing on CLK0/CLK1 or CLK2/CLK3 when VDDOA or VDDOB is set to 2.5 V and one output in the pair is inverted. This requires external 511 Ω pull-up and 240 Ω termination resistors per differential leg, as specified in Skyworks AN551. HCSL compatibility is confirmed only for 10-MSOP and 20-QFN packages - the 16-QFN package (SI5350A-B04041-GMR) supports it per Figure 3 and Section 4.3 of Rev. 1.2 datasheet.

How many unique high-frequency outputs can SI5350A-B04041-GMR generate above 112.5 MHz?

SI5350A-B04041-GMR can generate up to two unique frequencies above 112.5 MHz simultaneously (e.g., 125 MHz on CLK0 and 130 MHz on CLK1). Additional outputs above 112.5 MHz must duplicate one of those two frequencies - for example, CLK2 and CLK3 may both output 125 MHz, but a third distinct frequency like 150 MHz is prohibited. This limitation is inherent to the MultiSynth architecture and applies regardless of total output count.

Can SI5350A-B04041-GMR be reprogrammed after manufacturing?

No, SI5350A-B04041-GMR is factory-programmed with a fixed frequency plan and cannot be reconfigured in-system. It lacks I²C interface pins and is intended for applications where timing requirements are stable across product lifetime. For field-programmable alternatives, consider SI5350A-B-GM1 (same package, blank version) or SI5351A-B-GM1, both requiring external I²C control and configuration firmware.

What is the power-up time and power-down current of SI5350A-B04041-GMR?

SI5350A-B04041-GMR achieves valid output clocks within 2–10 ms after VDD reaches minimum (TRDY), or within 0.5–1 ms in PLL bypass mode (TBYP). In power-down mode (PDN = high), supply current drops to ≤50 µA. Core supply current is 21 mA typical with all 4 outputs enabled at 1.8 V - scaling with VDD and output count per Table 4 of the datasheet.