0.1 – 3.0 GHz SPDT High Power Switch (Single Bit Control) in a WLCSP Package

Please note: SKY13448-001 is being discontinued and is not recommended for new designs. Recommended replacement part is SKY13489-001.

The SKY13448-001 is a Single-Pole, Double-Throw (SPDT) LTE/WCDMA/GSM transmit switch. Switching is controlled by an integrated GPIO interface with a single control pin. Depending on the logic voltage level applied to the control pin, the antenna port is connected to one of the switched RF outputs (RF1 or RF2) through a low insertion loss path, while the path between the antenna port and the other RF port is in a high isolation state.

No external DC blocking capacitors are required as long as no DC voltage is applied on any RF path.

The SKY13448-001 is provided in a compact 8-bump, 1.1 x 1.1 x 0.36 mm Wafer Level Chip Scale Package (WLCSP) that meets requirements for board-level assembly. Bump diameters are 200 microns with a minimum bump pitch of 400 microns.

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Description (Absorptive/ Reflective)SPDT (R)
Frequency (GHz) Min.0.1
Frequency (GHz) Max.3
Typ. IL (dB)0.35-0.50
Typ. Isol. (dB)25-32
Typ. IIP3 (dBm)IMD3, -110
Typ. IP1 dB (dBm)40
Control Logic
PackageWLCSP, 8-bump
Package (mm)1.1 x 1.1 x 0.36


  • Broadband frequency range: 0.1 to 3.0 GHz
  • Low insertion loss: 0.5 dB @ 2.7 GHz
  • High isolation: 25 dB up to 2.7 GHz
  • No external DC blocking capacitors required
  • Single GPIO control line with VDD voltage regulator:
    • VCTL = 1.65 to 2.70 V
    • VDD = 2.45 to 3.00 V
  • Small, 8-bump WLCSP, 200 μm diameter, 400 μm pitch (1.1 x 1.1 x 0.36 mm) package (MSL1, 260 °C per JEDEC J-STD-020)

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