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Skyworks Solutions Inc. SKY65378-11
- Part No.:
- SKY65378-11
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- RF Front End (LNA + PA)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
SKY65378-11.pdf
- Description:
- 900 MHZ, RX FEM WITH DUAL ANTENN
- Quantity:
- Payment:
- Shipping:
Inventory:3,972
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Product details
Overview
SKY65378-11 from Skyworks Solutions is a highly integrated 860–930 MHz RF front-end module (FEM) designed for low-power ISM band systems. It integrates an LNA with programmable gain, antenna switching with transmit/receive diversity, and operates from 2.0–4.8 V. Its 2.5 dB typical noise figure, <1 μs switching time, and sleep current <1 μA make it suitable for battery-powered smart meters and in-home wireless sensors.
For engineers reviewing the SKY65378-11 datasheet, SKY65378-11 pinout, SKY65378-11 application, or SKY65378-11 equivalent, key selection considerations include its dual-antenna diversity support, CMOS-compatible digital control logic (1.6–3.6 V), QFN-24 package footprint, and guaranteed RF performance across –40°C to +85°C ambient operation.
Technical Context
The SKY65378-11 implements a fully matched 50 Ω architecture with integrated TR switch, LNA, and antenna diversity routing - enabling single-chip replacement of discrete PA/LNA/switch solutions in sub-GHz IoT transceivers. Its mode control uses three digital inputs (CSD, CPS, CTX) to select sleep, receive low/high gain, or transmit states per Table 9.
Antenna selection is decoupled via dedicated ANT_SEL pin, allowing independent TX/RX path assignment between ANT1 and ANT2 ports with 30 dB isolation and sub-1 μs switching. The device supports external transmit filtering via TX_FLT and internal LNA input conditioning through RX_FLT/LNA_IN pins, with all RF ports de-embedded and characterized on evaluation board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 860–930 MHz - Covers global ISM bands including EU 863–870 MHz, US 902–928 MHz, and KR 915–928 MHz. |
| Noise Figure (High Gain) | 2.5 dB typical - Enables high sensitivity reception in weak-signal environments such as buried utility meter deployments. |
| Transmit Insertion Loss | 1.5 dB typical (TR→ANT1/2) - Minimizes power loss between transceiver output and antenna, preserving battery life. |
| Supply Voltage Range | 2.0–4.8 V - Supports direct connection to Li-ion, Li-SOCl₂, or alkaline battery stacks without regulation overhead. |
| Sleep Current | <1 μA - Allows multi-year operation in wake-on-radio or periodic beaconing applications. |
| Switching Time | <1 μs turn-on/off; 800 ns ANT1↔ANT2 RX - Meets fast-hopping and TDMA timing constraints in mesh networks. |
| Package | 24-pin QFN, 4 × 4 mm, MSL1 - Compatible with standard SMT reflow profiles including lead-free soldering at 260 °C. |
Pinout & Package
SKY65378-11 is housed in a 4 × 4 mm, 24-pin Quad Flat No-Lead (QFN) package rated MSL1 per JEDEC J-STD-020. Exposed thermal pad (Pin 25, not numbered) requires solder connection to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CSD) | Shutdown control | Active-high enable for all functional blocks; drives device into sleep mode when low. |
| 3 (CPS) | Receive path select | Controls LNA gain state: logic high enables high-gain mode (17 dB), low enables low-gain mode (14 dB). |
| 4 (CTX) | Transmit enable | Activates transmit path and disables LNA; must be high with CSD high to enter TX mode. |
| 7 (ANT_SEL) | Antenna port selector | Selects active antenna: logic low enables ANT1, high enables ANT2 - independent of TX/RX mode. |
| 6 (TR) | Common transceiver port | Shared I/O for both transmit output and receive input; connects to transceiver IC baseband interface. |
| 14 (ANT1), 12 (ANT2) | Diversity antenna ports | RF outputs for external antennas; provide 30 dB isolation and <1 μs switching for robust link reliability. |
| 16 (TX_IN) | External transmit input | Accepts amplified RF from external PA; routed internally to ANT1/ANT2 via TR switch. |
| 23 (VCC) | Positive supply | Single 2.0–4.8 V rail powers all internal blocks; bypass capacitors required per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LNA with programmable gain | Two selectable gain modes (14 dB / 17 dB) optimize dynamic range for varying signal strength without external gain control circuitry. |
| Transmit/receive antenna diversity | Dedicated ANT_SEL pin enables real-time antenna selection during active communication, improving multipath resilience in indoor deployments. |
| Ultra-low sleep current | <1 μA shutdown current extends battery life in intermittent transmission applications like AMR metering. |
| Fast digital control interface | CMOS-compatible inputs (1.6–3.6 V) interface directly with MCU GPIOs without level-shifting, reducing BOM count. |
| Fully matched 50 Ω I/O | Eliminates need for external matching networks at TR, ANT1, ANT2, and TX_IN ports - simplifies RF layout and validation. |
Applications
| Smart Metering | In-Home Appliance Control |
|---|---|
Use Scenario: Wireless gas/water/electricity meter data collection in dense urban infrastructure with obstructed line-of-sight. IC Role / Device Role / Timing Role: RF front-end module handling bidirectional ISM-band communication between meter and concentrator gateway. Use Value: 2.5 dB NF and 30 dB antenna isolation maintain link budget under fading conditions; <1 μA sleep current enables 10+ year battery life. |
Use Scenario: Remote monitoring and control of HVAC, lighting, and security systems via proprietary sub-GHz mesh network. IC Role / Device Role / Timing Role: Integrated FEM providing antenna diversity and fast TX/RX switching for time-synchronized node polling. Use Value: Sub-microsecond switching supports TDMA slot alignment; 2.0–4.8 V supply range accommodates unregulated 3.6 V lithium primary cells. |
| Smart Thermostats | Industrial Sensor Networks |
Use Scenario: Battery-powered thermostat reporting ambient temperature/humidity to HVAC controller over long-range, low-duty-cycle links. IC Role / Device Role / Timing Role: Low-power RF interface managing periodic beaconing and on-demand command response in 868/915 MHz bands. Use Value: Programmable LNA gain adapts to variable distance from controller; 4 × 4 mm QFN footprint enables compact PCB design. |
Use Scenario: Wireless vibration, pressure, or corrosion sensors deployed in factory or pipeline environments with metal interference. IC Role / Device Role / Timing Role: Robust RF front-end enabling reliable packet delivery despite multipath and shadowing effects. Use Value: Dual-antenna diversity mitigates nulls caused by metallic enclosures; 800 ns RX antenna switching maintains real-time responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF front-end module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SX1280 + SX1281 (Semtech) | Transceiver + discrete FEM; requires external LNA, PA, and switch; no integrated antenna diversity logic. | Higher BOM count and layout complexity; supports LoRa modulation but lacks SKY65378-11's single-chip integration. | Choose when protocol flexibility (LoRa, FLRC, GFSK) outweighs integration benefits and size constraints. |
| RFM69HW (HopeRF) | Integrated transceiver with internal PA/LNA; no antenna switching; fixed 13 dBm output; no programmable LNA gain. | Limited to point-to-point or star topology; unsuitable for diversity-based mesh reliability requirements. | Choose for cost-sensitive, short-range applications where antenna diversity and ultra-low sleep current are not required. |
Compared with SX1280/SX1281 and RFM69HW, the SKY65378-11 delivers higher integration density, lower system-level power consumption, and hardware-enforced antenna diversity - reducing firmware complexity and improving link margin in challenging RF environments.
Availability
SKY65378-11 is available at Aetrix Electronics and suitable for smart metering, in-home appliance control, and smart thermostat applications requiring stable component supply, long-term lifecycle support, and consistent RF performance across production batches.
Supply support for SKY65378-11 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 analog and mixed-signal semiconductors, specializing in RF, mobile, infrastructure, and automotive connectivity solutions.
The SKY65378-11 belongs to Skyworks' low-power ISM-band front-end module product line, engineered specifically for battery-operated IoT endpoints needing high integration, minimal external components, and robust RF performance in congested 860–930 MHz environments.
FAQ
What is the recommended supply voltage range for stable operation of the SKY65378-11?
The SKY65378-11 operates reliably across a 2.0 V to 4.8 V supply range, with typical characterization performed at 4.0 V. This wide range allows direct interfacing with common battery chemistries - including 3.6 V lithium thionyl chloride and two-cell alkaline stacks - without intermediate regulation, preserving efficiency and simplifying power architecture in the SKY65378-11 design.
How does the SKY65378-11 implement antenna diversity, and what is the isolation between ANT1 and ANT2?
The SKY65378-11 provides true hardware-based antenna diversity using the dedicated ANT_SEL pin (Pin 7) to select between ANT1 and ANT2 independently of transmit or receive mode. Measured isolation between ANT1 and ANT2 is 30 dB minimum, ensuring minimal coupling during simultaneous operation and enabling robust link adaptation in multipath environments for the SKY65378-11.
What is the noise figure of the SKY65378-11 in high-gain receive mode, and how is it measured?
The SKY65378-11 achieves a typical noise figure of 2.5 dB in high-gain receive mode (CPS = CSD = logic "1", CTX = logic "0") at 900–930 MHz and 860–870 MHz. This value is measured on the evaluation board with 0 Ω connected between RX_FLT and LNA_IN pins, per Table 6, and reflects actual system-level sensitivity achievable with the SKY65378-11 in production designs.
Can the SKY65378-11 be used with 1.8 V logic controllers, and what are the input voltage thresholds?
The SKY65378-11 accepts CMOS-level digital inputs from 1.6 V to 3.6 V, making it compatible with 1.8 V microcontrollers without level shifters. Per Table 8, VIH (min) is 1.6 V and VIL (max) is 0.3 V, ensuring reliable mode control for the SKY65378-11 even with marginal GPIO drive strength or trace capacitance.
What is the thermal pad configuration for the SKY65378-11 QFN package, and is it electrically connected?
The SKY65378-11 QFN package includes an exposed thermal pad (unnumbered, centered on bottom side) that must be soldered to a PCB ground plane for optimal thermal dissipation and RF stability. Although not assigned a pin number in Table 1, this pad is internally connected to ground and requires appropriate stencil aperture and solder paste volume per Skyworks' layout guidelines for the SKY65378-11.
SKY65378-11 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- ISM
- Frequency:
- 860MHz ~ 930MHz
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-QFN (4x4)
SKY65378-11 FAQ
1.How can I place an order for SKY65378-11 through Aetrix?
Please submit a Request for Quotation (RFQ) for SKY65378-11 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SKY65378-11 reliable?
The price and inventory of SKY65378-11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SKY65378-11 is usually 5 days.
3.What payment methods are accepted for SKY65378-11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SKY65378-11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SKY65378-11?
SKY65378-11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SKY65378-11 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SKY65378-11?
For technical support, including SKY65378-11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SKY65378-11 requirements.
6.How does Aetrix verify that SKY65378-11 is sourced from the original manufacturer or authorized distributors?
All SKY65378-11 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SKY65378-11 meets industry standards.
7.What is the process for return or replacement of SKY65378-11?
All SKY65378-11 units undergo pre-shipment inspection (PSI). If there is an issue with SKY65378-11, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SKY65378-11 part is unused and in its original packaging.
Return procedure for SKY65378-11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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