Skyworks Solutions Inc. SI5350A-B05762-GM

Overview

SI5350A-B05762-GM 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, low period jitter (<70 ps pk-pk), and configurable spread spectrum on any output. It replaces multiple crystals/XOs in audio/video systems, residential gateways, and networking equipment using a single 25 or 27 MHz crystal reference.

For engineers reviewing the SI5350A-B05762-GM datasheet, SI5350A-B05762-GM pinout, SI5350A-B05762-GM application, or SI5350A-B05762-GM equivalent, key selection criteria include its 20-QFN package with 8 outputs, dual-PLL + fractional MultiSynth architecture, independent VDD/VDDO voltage scaling (1.8/2.5/3.3 V), and support for glitchless frequency switching via FS_0/FS_1 pins.

Technical Context

The SI5350A-B05762-GM implements two high-frequency PLLs (PLLA and PLLB) feeding eight independent fractional MultiSynth dividers-one per output-enabling simultaneous non-integer-related frequencies. PLLA supports spread spectrum modulation (±0.1% to ±1.5% center-spread at 31.5 kHz), while PLLB provides fixed-frequency outputs without spread spectrum.

It accepts only a 25 or 27 MHz fundamental-mode AT-cut crystal on XA/XB inputs, with internal load capacitance options (0/6/8/10 pF). Output buffers are individually configurable for drive strength, inversion, and disable state (high/low/high-Z), with separate VDDO pins enabling level translation across all eight CLKx outputs.

Key Specifications

Pinout & Package

SI5350A-B05762-GM is packaged in a 20-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions align with the Si5350A 20-QFN functional block diagram and pin description table (Rev. 1.2, pp. 19–20).

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, the SI5350A-B05762-GM offers guaranteed factory-set timing behavior without firmware overhead, lower jitter, and hardware-enforced EMI control-making it optimal for cost-sensitive, high-volume consumer electronics where boot-time determinism and layout simplicity are essential.

Availability

SI5350A-B05762-GM is available at Aetrix Electronics and suitable for audio/video equipment, residential gateways, and networking/communication systems requiring stable component supply, long-term lifecycle support, and drop-in XO replacement capability.

Supply support for SI5350A-B05762-GM 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 for wireless infrastructure, automotive, and industrial markets.

The Si5350A family is designed for cost-sensitive, high-volume applications requiring flexible, crystal-replacement clock generation with minimal design overhead-targeting consumer electronics, broadband gateways, and embedded networking platforms.

FAQ

What reference crystal does the SI5350A-B05762-GM require?

The SI5350A-B05762-GM requires a 25 MHz or 27 MHz fundamental-mode AT-cut crystal connected to XA/XB pins. It does not support external clock inputs or overtone crystals. Internal load capacitance (0/6/8/10 pF) is factory-configured per the B05762 specification, eliminating need for external capacitors in most cases. SI5350A-B05762-GM operates exclusively with this crystal reference-no alternative input sources are supported.

How many output frequencies can the SI5350A-B05762-GM generate simultaneously above 112.5 MHz?

The SI5350A-B05762-GM supports exactly two unique frequencies above 112.5 MHz at the same time-for example, 125 MHz on CLK0 and 130 MHz on CLK1. Additional outputs above 112.5 MHz must duplicate one of those two frequencies (e.g., CLK2 = 125 MHz, CLK3 = 130 MHz). This constraint is enforced by the underlying MultiSynth architecture and applies regardless of output count or configuration. SI5350A-B05762-GM's datasheet (Table 7, Note 1) explicitly defines this limit.

Does the SI5350A-B05762-GM support HCSL-compatible outputs?

Yes, the SI5350A-B05762-GM supports HCSL-compatible swing on output pairs when VDDO is set to 2.5 V and external 511 Ω/240 Ω termination is applied per Figure 3 of the datasheet. This functionality is validated for the 20-QFN package (used by SI5350A-B05762-GM) and requires one clock in the pair to be inverted. HCSL mode is not available with 1.8 V or 3.3 V VDDO supplies.

Can the SI5350A-B05762-GM be reprogrammed after manufacturing?

No, the SI5350A-B05762-GM is factory-programmed with a fixed configuration (B05762) and contains no I²C interface or nonvolatile memory for field reprogramming. All timing parameters-including output frequencies, spread spectrum settings, and control pin mappings-are permanently set during manufacturing. SI5350A-B05762-GM operates exclusively in pin-control mode using FS_0/FS_1, OEB_0/1/2, PDN, and SSEN signals.

What is the maximum allowable junction temperature for continuous operation of the SI5350A-B05762-GM?

The SI5350A-B05762-GM has an absolute maximum junction temperature of 150 °C (per Table 13), but continuous reliable operation requires staying within the recommended operating range of –40 °C to +85 °C ambient. For a 20-QFN package on a 4-layer board, thermal resistance θJA is 41 °C/W-so at 25 mA core current and 3.3 V supply, power dissipation (~82.5 mW) yields ~3.4 °C rise above ambient, well within safe limits. SI5350A-B05762-GM thermal data is specified in Tables 10–12 of the official datasheet.