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SKY85743-21
SKY85743-21
| Part Number | SKY85743-21 |
|---|---|
| Manufacturer | Skyworks Solutions, Inc. |
| Category | RF Front End Modules (FEM) > 5 GHz Wi‑Fi / WLAN Front End Modules |
| Description | 5 GHz Wi‑Fi 6 (802.11ax) Front‑End Module (FEM) with Power Amplifier, LNA, and SPDT Switch, 24‑Pin LGA Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
| Evaluation Board | SKY85743‑21EK1 |
Product Overview
The SKY85743‑21 is a highly integrated 5 GHz Front‑End Module (FEM) from Skyworks for high‑performance Wi‑Fi 6 (IEEE 802.11ax). It integrates 5 GHz power amplifier(PA), bypassable low‑noise amplifier(LNA), SPDT T/R switch, logarithmic power detector and directional coupler. Housed in 24‑pin 3 mm ×5 mm conformal shielded LGA package, it reduces PCB area for access‑point, router and wireless video streaming equipment.
Core Advantages
Optimized for Wi‑Fi 6 (802.11ax) Performance
Excellent linearity and output power for 1024‑QAM modulation, maintains low EVM for high‑rate wireless transmission.
High‑Level Module Integration
Integrated PA, bypass‑capable LNA, SPDT switch and power detector; reduces external matching components, PCB layout difficulty and total BOM cost.
Superior Receive Noise Figure & Sensitivity
Integrated high‑gain LNA with low noise figure, improves receiving sensitivity and extends wireless coverage for indoor and enterprise scenarios.
Compact Shielded Package & Power‑Saving Mode
24‑pin conformal shielded LGA package; built‑in power‑down mode for low idle power consumption, supports closed‑loop power control via internal power detector.
Key Specifications
| Brand | Skyworks Solutions, Inc. |
|---|---|
| RoHS Status | RoHS Compliant / Lead‑Free / Halogen‑Free |
| EDA / CAD | PCB Footprint & 3D Model Available upon Request |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | 24‑Pin LGA (3mm × 5mm × 1.2mm) |
| Mounting Type | Surface Mount Device (SMD/SMT) |
| Surface Marking / Silkscreen | 85743 Marking |
| Operating Frequency | 5.15 GHz to 5.925 GHz (5 GHz Band) |
| Wireless Standard | Wi‑Fi 6 (IEEE 802.11ax), 802.11ac / a / n |
| Transmit Gain (Tx) | 32 dB Typical |
| Receive Gain (Rx) | 16 dB (LNA High Gain Mode) |
| LNA Noise Figure | ~1.6 dB |
| Supply Voltage (VCC) | 2.7V to 3.6V |
| Output Power Typical | +21 dBm ~ +24 dBm (Depends on MCS Rate) |
| Operating Temperature | -40°C to +85°C (Industrial Grade) |
Typical Applications
- Wi‑Fi 6 (802.11ax) Access Points, Wireless Routers, and Mesh Network Nodes
- Enterprise Gateways, Set‑Top Boxes (STB), and Smart Home Hubs
- High‑Definition Video Streaming Devices and Over‑The‑Top (OTT) Media Players
- Industrial Internet of Things (IoT) Routers and Automation Communication Modules
- Outdoor Wireless Bridges and High‑Density Public Hotspots
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1‑2 business days |
| Delivery Time | 3‑7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What frequency band does SKY85743‑21 support?
A: SKY85743‑21 is a 5 GHz‑only FEM, frequency range 5.15‑5.925 GHz. Supports 802.11ax/ac/a/n, it does NOT support 2.4 GHz band.
Q2: What functional circuits are integrated inside SKY85743‑21?
A: Integrates 5 GHz PA, bypass‑capable LNA, SPDT T/R switch, logarithmic power detector and directional coupler, packaged in 24‑pin conformal shielded LGA.
Q3: Is SKY85743‑21 compatible with legacy Wi‑Fi standards?
A: Yes. Optimized for Wi‑Fi6 802.11ax, fully backward‑compatible with 802.11ac / 802.11a / 802.11n 5GHz‑mode.
Q4: Can SKY85743‑21 directly replace SKY85743‑11?
A: Not drop‑in compatible. PCB footprint looks similar, but power‑grade and internal tuning parameters differ. Check datasheet output‑power specs before substitution.
Q5: Is SKY85743‑21 QFN or LGA package?
A: Package is 24‑pin conformal shielded LGA (3 mm × 5 mm). It is NOT a 16‑pin QFN. Wrong footprint will cause soldering failure.
Q6: What is the corresponding evaluation board model?
A: Official evaluation board: SKY85743‑21EK1, used for prototype RF performance test and validation.
Q7: What is LNA bypass mode for?
A: Bypass mode disables internal LNA. Use for strong‑signal input scenarios to prevent amplifier saturation and signal distortion.
Q8: What is the operating supply voltage range?
A: Recommended supply voltage 2.7V‑3.6V. Do not exceed 3.6V maximum rating to avoid device damage.
Q9: Where can I get datasheet, footprint and 3D model?
A: Submit product inquiry form to obtain official datasheet, LGA PCB land pattern, 3D STEP file and bulk‑order quotation.
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