SKY13522-644LF - 0.7-6 GHz SPDT RF Switch, 8-QFN | Skyworks
Référence : SKY13522-644LF ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.85 | $0,85 |
| 10 | $0.78 | $7,80 |
| 100 | $0.69 | $69,00 |
| 500 | $0.62 | $310,00 |
| 1 000 | $0.55 | $550,00 |
| 3 000 | $0.48 | $1 440,00 |
SKY13522-644LF Présentation
An RF SPDT (single-pole double-throw) switch is a semiconductor routing element that selects one of two RF signal paths using a control voltage. SPDT switches belong to the broader category of RF switches -> RF front-end components -> wireless transceivers -> RF & wireless ICs. They are essential building blocks in time-division duplex (TDD) systems, antenna diversity modules, and band-selection filters, where a single antenna or filter bank must be shared between transmit and receive or between multiple bands.
Key features include 0.7 GHz to 6.0 GHz operating range, 50 Ohm characteristic impedance, single-bit (one logic input) control interface, integrated DC blocking on the RF ports, and a compact 1.1 x 1.1 mm QFN-8 footprint. The advanced pHEMT switching technology maintains low insertion loss and high isolation across all switching paths, making the part well suited to cellular handset and module designs targeting GSM, CDMA, WCDMA, and LTE front-end sections.
The device operates from a single supply and draws minimal DC current; the switch state is set by a single CMOS-compatible logic input, simplifying host-MCU or baseband GPIO integration. Internal ESD protection on the RF pins and the control input increases robustness during module assembly and field use.
Typical applications include cellular handset transmit/receive switching, Wi-Fi 2.4 GHz and 5 GHz band routing, Bluetooth/BLE front-end switching, IoT and wearables antenna diversity, GPS L1 path selection, and reference designs for Wi-Fi + BLE combo modules. The broadband response also extends to 5 GHz Wi-Fi and sub-6 GHz industrial/scientific/medical bands.
When designing with this part, place RF traces as 50 Ohm controlled-impedance lines and keep the VC1 control line routed away from sensitive RF traces to avoid digital-to-RF coupling. Decouple VDD close to the pin with a 1 nF to 100 pF combination; a typical application uses a single 1 nF X7R capacitor.
This page synthesizes distributor pricing, EOL replacement guidance, drop-in alternatives, and practical design notes that complement the Skyworks manufacturer datasheet.
Alternatives de remplacement direct pour SKY13522-644LF — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SKY13522-644LF (même facteur de forme et même empreinte) — différant par Isolation.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SKY13446-374LF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SKY13453-385LF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SKY13522-644LF-EVB
✅ Remplacement direct✓ En stock
$66 / unité
Voir la fiche technique →SKY13522-644LF Valeurs maximales et caractéristiques électriques
| Switch Type | SPDT (Single-Pole Double-Throw) |
| Operating Frequency Range | 0.7 GHz to 6.0 GHz |
| Isolation | 47 dB at 2.2 GHz (per Mouser listing) |
| Characteristic Impedance | 50 Ohm |
| Topologie | Reflective |
| Control Interface | Single-bit CMOS logic |
| Application Bands | CDMA, GSM, WCDMA |
| Boîtier | 8-QFN (1.1 x 1.1 mm) |
| Type de montage | Surface Mount |
| ESD Protection | Yes (RF pins and control input) |
| Lead-Free / RoHS | Yes (per part suffix LF) |
Configuration des broches de SKY13522-644LF
| Broche 1 | RF1 — RF port 1 (50 Ohm, DC blocked internally) |
| Broche 2 | GND — Ground |
| Broche 3 | RF2 — RF port 2 (50 Ohm, DC blocked internally) |
| Broche 4 | GND — Ground |
| Broche 5 | VC1 — Control voltage input (CMOS logic, single-bit) |
| Broche 6 | GND — Ground |
| Broche 7 | RFC — Common RF port (antenna, 50 Ohm, DC blocked internally) |
| Broche 8 | GND — Ground / paddle |
Applications typiques
SKY13522-644LF convient pour 6 applications: Cellular Handset Transmit/Receive Switching, Wi-Fi 2.4 GHz / 5 GHz Band Routing, IoT and Wearable Antenna Diversity, GPS L1 Path Selection, Bluetooth / BLE Front-End Switching, Reference Designs for Wi-Fi + BLE Combo Modules.
Cellular Handset Transmit/Receive Switching
The SKY13522-644LF is well suited to TDD cellular front-end switching in GSM, CDMA, and WCDMA handsets, where a single antenna is shared between transmit and receive paths under time-division control. With its 0.7-6.0 GHz bandwidth, 50 Ohm matching, and 47 dB isolation at 2.2 GHz, it cleanly routes the antenna port between the PA output and LNA input while preserving signal integrity. The reflective topology terminates the unused port into a controlled impedance, minimizing leakage. Compared with a lossy PIN-diode switch, the SKY13522-644LF's pHEMT switching elements draw negligible DC current and switch in nanoseconds, which simplifies power-sequencing design. Single-bit CMOS control means the baseband GPIO can drive VC1 directly without level shifters, reducing BOM count. Designers should verify DC-blocking capacitor values against the latest Skyworks reference schematic for each cellular band.
Recommandé
Wi-Fi 2.4 GHz / 5 GHz Band Routing
The SKY13522-644LF covers 2.4 GHz Wi-Fi, 5 GHz Wi-Fi (802.11a/n/ac/ax), and Bluetooth/BLE paths in dual-band front-end modules. Its 0.7-6.0 GHz band lets a single switch route between 2.4 GHz and 5 GHz antenna chains or between a Wi-Fi port and a Bluetooth port sharing the same antenna. The 50 Ohm impedance integrates directly with the typical Wi-Fi FEM or diplexer, eliminating matching networks. Single-bit GPIO control simplifies the WLAN/BT coexistence logic on the host MCU. The compact 1.1 x 1.1 mm QFN-8 footprint is critical for smartphone and module layouts where front-end real estate is at a premium. Note that this part is EOL; new Wi-Fi designs should target the Skyworks SKY13446-374LF replacement.
Recommandé
IoT and Wearable Antenna Diversity
In IoT and wearable designs, the SKY13522-644LF enables antenna-diversity switching between two compact antennas to combat body-shadowing and multipath fading. Its 0.7-6.0 GHz range covers sub-GHz ISM, 2.4 GHz BLE/Zigbee/Thread, and 5 GHz Wi-Fi HaLow bands. The 1.1 x 1.1 mm QFN-8 footprint fits inside a watch, fitness band, or coin-cell sensor node where board area is severely constrained. Single-bit control lets an ultra-low-power MCU toggle the antenna selection during packet reception without complex logic. The pHEMT design draws microamp-level quiescent current, preserving battery life. The 50 Ohm match supports direct connection to a chip antenna or trace antenna without external matching parts, reducing BOM cost and assembly yield risk in high-volume IoT products.
Recommandé
GPS L1 Path Selection
The SKY13522-644LF can route the GPS L1 (1.575 GHz) signal between an active ceramic patch antenna and the GNSS receiver, or between two GNSS antennas for assisted-GPS or anti-jamming diversity. The switch's 0.7-6.0 GHz response is well matched to L1, with low insertion loss preserving the link budget critical for cold-start TTFF and tracking sensitivity under foliage. The 50 Ohm characteristic impedance simplifies integration with the typical GPS LNA and SAW filter chain. Single-bit control means an existing baseband or sensor-hub GPIO can drive VC1 directly. The QFN-8 (1.1 x 1.1 mm) footprint is small enough for handheld GPS trackers, asset trackers, and asset/fleet telematics modules. Note that the SKY13522-644LF is EOL, so new GPS designs should adopt the SKY13446-374LF.
Recommandé
Bluetooth / BLE Front-End Switching
Bluetooth and BLE designs often need to route the 2.4 GHz RF path between a power amplifier and the antenna, or between two antennas for BLE direction-finding or mesh-node selection. The SKY13522-644LF provides 0.7-6.0 GHz coverage that easily spans 2.4-2.5 GHz BLE, with low insertion loss preserving the link budget and high isolation keeping TX leakage out of the RX path. The single-bit CMOS control integrates with the BLE SoC's GPIO, removing the need for an external level shifter. The 1.1 x 1.1 mm QFN-8 footprint is small enough for earbuds, hearing aids, and BLE tags. Designers should follow the Skyworks reference layout for DC-blocking cap placement to avoid degrading the 47 dB isolation figure at 2.2 GHz.
Recommandé
Reference Designs for Wi-Fi + BLE Combo Modules
The SKY13522-644LF appears in Wi-Fi + BLE combo module reference designs such as the Renesas DA16600MOD, where it routes between the Wi-Fi and BLE paths sharing a single antenna or between two antenna chains. Its broadband 0.7-6.0 GHz response eliminates the need for separate switches per band, simplifying the BOM and reducing module area. Single-bit control lets the host MCU coordinate coexistence between the Wi-Fi and BLE radios. Because the SKY13522-644LF is EOL, Renesas and Skyworks both point designers to the SKY13446-374LF in updated reference designs. Engineers porting legacy DA16600MOD layouts can drop in the SKY13446-374LF without PCB rework, then revalidate the DC-blocking and bypass cap values per the latest datasheet.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SKY13522-644LF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SKY13446-374LF | SKY13453-385LF | SKY13522-644LF-EVB |
|---|---|---|---|---|
| Package | QFN-8 (1.1x1.1 mm) | QFN-8 (1.1x1.1 mm) - same | QFN-8 (1.1x1.1 mm) - same | QFN-8 (1.1x1.1 mm) evaluation board - same |
| Brand | Skyworks | Skyworks (same brand) | Skyworks (same brand) | Skyworks (same brand) |
| Switch Type | SPDT reflective | SPDT | SPDT | SPDT |
| Operating Frequency Range | 0.7 GHz to 6.0 GHz | Comparable broadband SPDT | Comparable broadband SPDT | 0.7 GHz to 3 GHz (per EVB) |
| Characteristic Impedance | 50 Ohm | 50 Ohm | 50 Ohm | 50 Ohm |
| Control Interface | Single-bit CMOS | Single-bit CMOS (compatible) | VC1 (may differ in level) | Single-bit CMOS |
| Lifecycle Status | EOL (discontinued, document 202858G) | Active | Active | Evaluation board, active |
Principaux différenciateurs
- Ultra-compact 1.1 x 1.1 mm QFN-8 footprint for size-constrained modules (vs Larger QFN-12/16 RF switches from competitors)
- Broadband 0.7-6.0 GHz coverage in a single part (vs Narrow-band SPDTs covering only 2.4-2.5 GHz or only sub-6 GHz)
- 47 dB isolation at 2.2 GHz with reflective topology (vs Lower-isolation SPDTs in the same QFN-8 class)
Notes de conception
Use 50 Ohm controlled-impedance microstrip or coplanar-waveguide traces for all three RF ports (RFC, RF1, RF2). Keep the VC1 control line away from sensitive RF traces and route it on the opposite side of the ground plane if possible. Place RF bypass and DC-blocking capacitors as close to the package pins as the Skyworks reference layout shows. Maintain a continuous ground plane beneath the QFN paddle and stitch vias around the RF traces to suppress parasitic modes in the 2.4-6 GHz range.
The SKY13522-644LF is a passive RF switch and draws only leakage-level DC current; ensure VC1 swings fully between logic-low and logic-high rails to achieve specified isolation. Add a small RC filter (e.g. 100 ohm + 1 nF) on VC1 to prevent digital-to-RF coupling from the host GPIO. Per the datasheet, internal ESD protection is present on VC1 and the RF ports, but external TVS protection is recommended for harsh industrial environments.
Do not assume any QFN-8 SPDT switch is a drop-in for the SKY13522-644LF: control logic differs across the Skyworks family. The SKY13453-385LF, for example, may require VCTL re-validation per a Renesas community thread (Mar 2026). Also note the SKY13522-644LF is EOL; for new designs plan on the SKY13446-374LF as the Skyworks-suggested replacement. Avoid substituting a non-Skyworks SPDT without checking isolation, insertion loss, and DC-blocking capacitor values, as third-party cross-references (e.g. Guerrilla RF) may be functional-equivalent rather than pin-to-pin compatible.
Informations de conformité
Lead-free (LF suffix) and RoHS compliant per the part numbering convention. REACH compliance carried forward from the Skyworks product family. AEC-Q100 not applicable - this is a commercial/consumer RF switch, not an automotive-qualified part. Halogen-free status not explicitly stated in the verified web data.
