Skyworks Solutions Inc. SI5350A-B04723-GMR

Overview

SI5350A-B04723-GMR from Skyworks Solutions is a factory-programmed, pin-controlled CMOS clock generator delivering up to 8 independent output frequencies (2.5 kHz–200 MHz) with 0 ppm synthesis error, <70 ps pk-pk period jitter, and configurable spread spectrum on any output. It operates from a 25 or 27 MHz crystal reference and supports independent core (1.8/2.5/3.3 V) and output (1.8/2.5/3.3 V) supply rails for level translation in mixed-voltage systems such as audio/video SoC platforms.

For engineers reviewing the SI5350A-B04723-GMR datasheet, SI5350A-B04723-GMR pinout, SI5350A-B04723-GMR application, or SI5350A-B04723-GMR equivalent, this device enables precise multi-frequency clocking without I²C interface overhead, supports glitchless frequency switching via FS pins, and integrates HCSL-compatible swing when VDDO = 2.5 V - critical for HDMI PHY, USB controller, and Ethernet PHY timing in residential gateways and set-top boxes.

Technical Context

The SI5350A-B04723-GMR implements a dual-PLL + eight fractional MultiSynth™ architecture, enabling simultaneous non-integer-related outputs. Each output uses a dedicated high-resolution divider with selectable F1/F2 frequency pairs controlled by FS_0/FS_1 pins - supporting dynamic rate changes without phase discontinuity.

It accepts only a fixed-frequency crystal (25 or 27 MHz) at XA/XB inputs, not external clock or voltage-referenced inputs. Spread spectrum is available only on PLLA-synchronized outputs (not PLLB), with modulation rates fixed at 31.5 kHz and deviation selectable in 0.1% steps (±0.1% to ±1.5% center-spread or –0.1% to –2.5% down-spread).

Key Specifications

Pinout & Package

SI5350A-B04723-GMR is packaged in a 20-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Skyworks Rev. 1.2 datasheet Section 7.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5350A-B-GM and Si5351A-B-GM, SI5350A-B04723-GMR delivers immediate plug-and-play operation with guaranteed factory-set frequencies, eliminates I²C bus contention and firmware dependencies, and uniquely supports hardware-triggered glitchless frequency switching - making it optimal for cost-sensitive, high-volume consumer electronics with fixed timing requirements.

Availability

SI5350A-B04723-GMR is available at Aetrix Electronics and suitable for HDMI transceivers, residential gateways, and set-top box designs requiring stable component supply, long-term lifecycle support, and guaranteed factory-programmed timing accuracy.

Supply support for SI5350A-B04723-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and power management solutions for wireless infrastructure, automotive, and industrial markets.

The Si5350A family is engineered for cost-sensitive, high-volume consumer electronics requiring flexible, crystal-replacement clock generation with zero ppm frequency error and ultra-low jitter - targeting audio/video, networking, and embedded computing applications.

FAQ

What reference crystal frequency does SI5350A-B04723-GMR support?

SI5350A-B04723-GMR supports only 25 MHz or 27 MHz AT-cut crystals connected to XA/XB pins. It does not accept external clock signals or voltage-referenced inputs. The internal load capacitance is configurable (0/6/8/10 pF) via ClockBuilder Pro, and external capacitors ≤2 pF may be added for crystals requiring 12 pF load.

Does SI5350A-B04723-GMR support HCSL output levels?

Yes, SI5350A-B04723-GMR supports HCSL-compatible swing when the corresponding VDDO rail (e.g., VDDOA for CLK0/1) is set to 2.5 V and the output is inverted. This configuration meets HCSL jitter and amplitude requirements for PCIe Gen1 and SATA interfaces, but is only supported in the 10-MSOP and 20-QFN packages.

How many independent frequencies can SI5350A-B04723-GMR generate above 112.5 MHz?

SI5350A-B04723-GMR can simultaneously output no more than two unique frequencies above 112.5 MHz. For example, 125 MHz on CLK0 and 130 MHz on CLK1 is allowed, but adding 150 MHz on CLK2 violates the specification. Multiple copies of the same high-frequency (e.g., 125 MHz on four outputs) are permitted.

Is I²C interface required to configure SI5350A-B04723-GMR?

No, SI5350A-B04723-GMR is factory-programmed and operates exclusively via pin-strapped control (P0–P4). It has no I²C interface, eliminating bus routing, pull-up resistors, and firmware initialization code. Configuration is fixed at manufacture - including output frequencies, spread spectrum settings, and F1/F2 mappings.

What is the maximum period jitter specification for SI5350A-B04723-GMR?

The maximum period jitter for SI5350A-B04723-GMR is 155 ps pk-pk (all outputs active, worst-case real-world frequency plan), with typical performance at <70 ps pk-pk. Jitter is measured over 10,000 cycles at default high-drive strength (50 Ω output impedance) and is highly dependent on the specific frequency plan deployed.