Skyworks Solutions Inc. SKY13453-385LF

Overview

SKY13453-385LF from Skyworks Solutions is a 0.01–6.0 GHz single-pole, double-throw (SPDT) RF switch with single-bit control, 0.40 dB typical insertion loss at 2.0 GHz, >25 dB isolation at 2.0 GHz, and housed in a 1 × 1 mm, 6-pin QFN package. It serves as a mode-switching element before the power amplifier in cellular pre-PA and dual-band WLAN (802.11a/b/g/n) systems.

For engineers reviewing the SKY13453-385LF datasheet, SKY13453-385LF pinout, SKY13453-385LF application, or SKY13453-385LF equivalent, key selection criteria include its broadband RF performance across 0.01–6.0 GHz, low DC control current (1 µA), MSL1 moisture sensitivity rating, and compatibility with both leaded and lead-free reflow processes.

Technical Context

The SKY13453-385LF implements a single-control CMOS-based SPDT architecture where VCTL logic level (0–0.45 V for Low, 1.8–3.0 V for High) directly selects RFC-to-RF1 or RFC-to-RF2 conduction paths. Its internal decoder ensures mutually exclusive RF path activation without overlap or shoot-through.

It operates over –40 °C to +90 °C, supports 2.5–3.5 V supply voltage (VDD), tolerates up to +33 dBm RF input power, and delivers <0.85 dB max insertion loss across 4.8–6.0 GHz - critical for 5 GHz WLAN and LTE/5G front-end module integration.

Key Specifications

Pinout & Package

SKY13453-385LF uses a compact, thermally enhanced 1 × 1 mm Quad Flat No-Lead (QFN) package with exposed thermal pad (see Figure 12). The package is MSL1 rated and qualified for both leaded and lead-free reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with QM11025 and BGU7005, the SKY13453-385LF offers broader frequency coverage (to 6.0 GHz), true single-bit control simplicity, and guaranteed MSL1 reliability - making it optimal for multi-band cellular/WLAN coexistence in space- and power-constrained designs.

Availability

SKY13453-385LF is available at Aetrix Electronics and suitable for cellular pre-PA mode switching, dual-band WLAN front-end design, and IoT modem integration requiring stable component supply, consistent RF performance, and MSL1-compliant manufacturing support.

Supply support for SKY13453-385LF 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 communications, delivering RF, microwave, and precision analog solutions for mobile, infrastructure, automotive, and IoT markets.

The SKY13453-385LF belongs to Skyworks' high-linearity, miniature SPDT switch product line, engineered specifically for broadband antenna and PA path switching in next-generation cellular and WLAN front-end modules.

FAQ

What is the absolute maximum RF input power rating for the SKY13453-385LF?

The SKY13453-385LF has an absolute maximum RF input power rating of +33 dBm, as specified in Table 2 of its datasheet. This rating applies across its full 0.01–6.0 GHz operating range and ensures robust operation in high-power LTE and WLAN transmit stages without degradation or damage when used within recommended bias conditions (VDD = 2.5–3.5 V, VCTL within specified logic levels).

Does the SKY13453-385LF require external DC blocking capacitors on its RF ports?

Yes, the SKY13453-385LF requires external DC blocking capacitors on RF1, RF2, and RFC pins, as explicitly stated in Table 1 of the datasheet. All three RF terminals must be DC blocked to prevent bias disruption and ensure proper RF signal coupling; typical evaluation board designs use 10 nF capacitors for this purpose.

What is the minimum and maximum control voltage (VCTL) range that guarantees defined switching behavior for the SKY13453-385LF?

The SKY13453-385LF guarantees defined switching behavior when VCTL is maintained within 0–0.45 V for Low state (RFC→RF2) and 1.8–3.0 V for High state (RFC→RF1), per Table 4's truth table. Voltages outside these ranges place the device in an undefined state, though no damage occurs - precise logic-level alignment avoids ambiguous RF path selection.

Can the SKY13453-385LF operate reliably at 5.8 GHz for 802.11ac applications?

Yes, the SKY13453-385LF maintains verified performance at 5.8 GHz: insertion loss is ≤0.85 dB (typical 0.70 dB), isolation remains ≥15 dB, and IIP3 reaches +56 dBm, all confirmed in Table 3. These specifications meet 802.11ac requirements for 5 GHz band switching in access points and client devices using the SKY13453-385LF.

Is the SKY13453-385LF compatible with lead-free solder reflow processes?

Yes, the SKY13453-385LF is qualified for both leaded and lead-free solder reflow processes, with MSL1 rating at 260 °C per JEDEC J-STD-020. Its package withstands peak reflow temperatures up to 260 °C, and Skyworks confirms compatibility via Application Note 200164 ("Solder Reflow Information").