Skyworks Solutions Inc. SKY13388-465LF

Overview

SKY13388-465LF from Skyworks Solutions is a symmetrical single-pole, four-throw (SP4T) RF switch with integrated logic decoder, designed for broadband antenna switching in WCDMA/CDMA/LTE front-end modules. It operates from 0.05 to 2.7 GHz, delivers 0.60 dB typical insertion loss at 2.2 GHz, >30 dB isolation at 1.0 GHz, and supports 2.5–5.5 V supply with 1.8 V logic compatibility.

For engineers reviewing the SKY13388-465LF datasheet, SKY13388-465LF pinout, SKY13388-465LF application, or SKY13388-465LF equivalent, key selection considerations include its SOI-based high-linearity architecture, QFN-12 (2 × 2 mm) package, integrated 2-bit decoder eliminating external logic, and suitability for diversity receive and multi-band transmit antenna routing in space-constrained mobile RF front-ends.

Technical Context

The SKY13388-465LF implements a silicon-on-insulator (SOI) process enabling high linearity (IIP3 = +65 dBm @ 0.9 GHz) and low distortion (harmonics >75 dBc @ 2.2 GHz), while supporting fast switching (tON/tOFF ≤ 1000 ns) and ultra-low control current (ICTL = 5 μA). Its on-chip energy management uses only two DC control lines (V1/V2) plus EN to select among four RF inputs (RF1–RF4) routed to the common ANT port.

State control follows a defined truth table with explicit shutdown mode (EN = 0), and all unused RF ports are internally terminated when not selected. The device maintains stable RF performance across –40 °C to +85 °C operating temperature and requires no external matching components due to 50 Ω port impedance and >20 dB return loss across full band.

Key Specifications

Pinout & Package

SKY13388-465LF is housed in a 12-pin Quad Flat No-Lead (QFN) package measuring 2.0 × 2.0 × 0.55 mm with an exposed thermal pad (pin 12 must be grounded). The package is moisture sensitivity level 1 (MSL1) rated for 260 °C reflow and compatible with both leaded and lead-free soldering processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SP4T RF switch applications.

Compared with QM11025 and AFEM-8072, the SKY13388-465LF uniquely balances broadband coverage, integrated logic, and minimal external components-making it optimal for programmable antenna architectures where software-defined path selection and compact layout are prioritized over extended frequency reach or monolithic integration.

Availability

SKY13388-465LF is available at Aetrix Electronics and suitable for WCDMA/LTE front-end modules, diversity receive antenna systems, and multi-band cellular transceivers requiring stable component supply, consistent MSL1 handling, and long-term production continuity.

Supply support for SKY13388-465LF 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 high-performance analog semiconductors for wireless infrastructure, mobile devices, and automotive connectivity, specializing in RF front-end solutions with industry-leading SOI and GaAs technologies.

The SKY13388-465LF belongs to Skyworks' SP4T switch product line engineered for broadband antenna switching in 3GPP-compliant mobile handsets and tablets, emphasizing low-loss, high-isolation, and logic-integrated operation to simplify RF system design.

FAQ

What is the maximum RF input power rating for the SKY13388-465LF?

The SKY13388-465LF has an absolute maximum RF input power rating of +37 dBm, as specified in Table 2 of the datasheet. This applies to any RF port (RF1–RF4 or ANT) under continuous wave conditions. Operation above this level risks permanent damage, and designers must ensure peak power-including LTE burst envelopes-remains within this limit across all operating temperatures and frequencies.

Does the SKY13388-465LF require external DC blocking capacitors on its RF ports?

No, the SKY13388-465LF does not require external DC blocking capacitors on RF1–RF4 or ANT ports. All RF ports are internally DC-blocked and 50 Ω matched across 0.05–2.7 GHz, enabling direct connection to antennas, PAs, and LNAs without additional passive components-reducing insertion loss and board space.

How is the shutdown state activated on the SKY13388-465LF?

The SKY13388-465LF enters shutdown mode when the EN pin (Pin 4) is driven low (0–0.4 V), regardless of V1/V2 states. In this state, supply current drops to 50 μA, all RF paths are isolated, and the device draws minimal power-ideal for battery-saving modes in mobile devices where antenna switching is temporarily disabled.

Can the SKY13388-465LF operate with a 1.8 V supply voltage?

No, the SKY13388-465LF requires a minimum VDD of 2.5 V and supports up to 5.5 V; it cannot operate at 1.8 V supply. However, its control inputs (V1, V2, EN) are fully compatible with 1.8 V logic levels (VHIGH = 1.65–3.3 V), allowing direct interface with 1.8 V baseband processors while powered from a separate 2.6–3.3 V rail.

What is the thermal pad connection requirement for the SKY13388-465LF QFN package?

The exposed thermal pad (Pin 12) of the SKY13388-465LF must be soldered to a solid ground plane on the PCB to ensure proper thermal dissipation and RF grounding. The datasheet explicitly states "Exposed pad must be grounded," and failure to connect it results in degraded thermal performance, increased junction temperature, and potential reliability issues under sustained RF power.