Skyworks Solutions Inc. SI5350A-B02802-GT

Overview

SI5350A-B02802-GT from Skyworks Solutions is a factory-programmed, pin-controlled CMOS clock generator delivering three independent output clocks (CLK0–CLK2) with 0 ppm frequency error across 2.5 kHz–200 MHz. It uses a 25 MHz or 27 MHz crystal reference, supports glitchless dual-frequency switching via FS_0/FS_1 pins, and operates with core VDD at 1.8/2.5/3.3 V and independent VDDO per output bank. It replaces multiple crystals/XOs in audio/video timing systems.

For engineers reviewing the SI5350A-B02802-GT datasheet, SI5350A-B02802-GT pinout, SI5350A-B02802-GT application, or SI5350A-B02802-GT equivalent, key selection criteria include its 3-output 10-MSOP package, factory-configured frequency plan, spread spectrum enable per output, static phase offset support, and HCSL-compatible swing capability when VDDOA = 2.5 V.

Technical Context

The SI5350A-B02802-GT implements a dual-PLL + eight fractional MultiSynth architecture-two PLLs (PLLA and PLLB) feed up to eight independently programmable dividers, though this specific variant is configured for three outputs. Each output uses a dedicated MultiSynth divider enabling non-integer-related frequencies with zero accumulated synthesis error.

It accepts only a fixed-frequency crystal (25 or 27 MHz) on XA/XB inputs, lacks I²C interface, and relies on five configurable control pins (P0–P4): PDN for full shutdown (50 µA standby), SSEN for global spread spectrum disable, and FS_0/FS_1 for glitchless frequency selection on CLK0–CLK2. Output drive strength and rise/fall time are hardware-configurable via internal settings.

Key Specifications

Pinout & Package

SI5350A-B02802-GT is packaged in a 10-pin MSOP (3.0 mm × 4.9 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Rev. 1.2 datasheet Section 7.3 and Figure 4 (10-MSOP block diagram).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5350A-B02802-GT, Si5350A-B-GT requires external programming and validation, while Si5351A-B-GT trades factory assurance for runtime flexibility-making SI5350A-B02802-GT optimal for cost-sensitive, high-volume, fixed-timing applications like consumer A/V gear.

Availability

SI5350A-B02802-GT is available at Aetrix Electronics and suitable for audio/video timing, HDMI source design, and embedded video capture applications requiring stable component supply, guaranteed factory configuration, and long-term production continuity.

Supply support for SI5350A-B02802-GT 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 precision analog products.

The Si5350A family is designed for cost-sensitive, high-volume applications requiring flexible, low-jitter clock generation-specifically targeting crystal and XO replacement in consumer electronics, networking, and embedded systems.

FAQ

What reference crystal frequency does the SI5350A-B02802-GT require?

The SI5350A-B02802-GT requires either a 25 MHz or 27 MHz fundamental-mode AT-cut crystal connected across XA and XB pins. Internal load capacitance is factory-configured to match the crystal's specified CL (6/8/10 pF); external capacitors ≤2 pF may be added if CL = 12 pF. The SI5350A-B02802-GT does not accept external clock signals on XA/XB-only crystal operation is supported.

Does the SI5350A-B02802-GT support I²C configuration?

No, the SI5350A-B02802-GT is a pin-controlled, factory-programmed variant and does not include an I²C interface. All configuration-including output frequencies, spread spectrum settings, and control pin functions-is permanently programmed during manufacturing. To modify settings, a different part number must be ordered. The SI5350A-B02802-GT is intended for fixed-function applications where runtime reprogramming is unnecessary.

Can the SI5350A-B02802-GT generate frequencies above 112.5 MHz on all three outputs?

No-the SI5350A-B02802-GT supports only two unique frequencies above 112.5 MHz simultaneously. For example, it can output 125 MHz on CLK0 and 130 MHz on CLK1, but CLK2 must be ≤112.5 MHz or equal to one of the other two frequencies. This limitation arises from internal PLL resource allocation and is specified in Table 7 of the datasheet. The SI5350A-B02802-GT's factory configuration adheres strictly to this constraint.

How is spread spectrum applied to outputs on the SI5350A-B02802-GT?

Spread spectrum is factory-enabled on specific outputs of the SI5350A-B02802-GT and can be globally disabled via the SSEN pin (P4). It is only available on outputs derived from PLLA-not PLLB-and supports down-spread (–0.1% to –2.5%) or center-spread (±0.1% to ±1.5%) at a fixed 31.5 kHz modulation rate. The SI5350A-B02802-GT's configuration defines which outputs have spread spectrum; it cannot be changed post-manufacture.

What is the thermal performance of the SI5350A-B02802-GT in its 10-MSOP package?

In a standard 2-layer PCB per JESD51-2A, the SI5350A-B02802-GT (10-MSOP) has a junction-to-ambient thermal resistance (θJA) of 150 °C/W and junction-to-board (ΨJB) of 82 °C/W. On a 4-layer board, θJA improves to 126 °C/W. These values assume proper thermal pad soldering and adequate copper pour. The SI5350A-B02802-GT operates across –40 °C to +85 °C ambient and maintains specification compliance within these thermal limits.