2.4 GHz Front-End Module (FEM) for Zigbee®, Thread, and Bluetooth® Applications

The SKY66408-11 is a high-performance, fully integrated RF front-end module (FEM) designed for Zigbee®, Thread, and Bluetooth® (including low energy) applications. The SKY66408-11 is designed for ease of use and maximum flexibility. The device provides an integrated inter-stage matching and harmonic filter, and digital controls compatible with 1.7 V to 3.6 V CMOS levels.

The RF blocks operate over a wide supply voltage range from 1.8 V to 3.6 V that allows the SKY66408-11 to be used in battery powered applications over a wide spectrum of the battery discharge curve.

A functional block diagram is shown in Figure 1. The SKY66408-11 is provided in a small, 24-pin, 3.0 mm x 3.0 mm Multi-Chip Module (MCM) package.

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RF Frequency (MHz)2400-2500
Supply Voltage (V)1.8-3.6
PackageSmall MCM, 24-pin
Package (mm)3.0 x 3.0 x 0.6
Tx Gain (dB)TBD
Saturated Output Power (dBm) Typ.21
Rx Insertion Loss (dB) Typ.TBD


  • Fully programmable Pout via I2C interface
  • Integrated PA with up to +21 dBm output power
  • Integrated LNA (2.5 dB noise figure typical) and bypass path
  • Integrated antenna diversity switching for all modes
  • Single-ended transmit/receive interface
  • Supply range: 1.7 V to 3.6 V
  • Sleep mode current: < 3 μA typical
  • No external bias resistor is required
  • Small MCM (24-pin, 3.0 mm x 3.0 mm x 0.6 mm) package, NiPdAu-plated (MSL3, 260 °C per JEDEC-J-STD-020)

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