0.7 to 2.7 GHz SPDT High Power Switch (Single Bit Control) in a WLCSP Package

The SKY13489-001 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 SKY13489-001 is provided in a compact 6-bump, 1.135 x 0.735 x 0.400 mm Wafer Level Chip Scale Package (WLCSP) that meets requirements for board-level assembly. Bump diameters are 217 microns with a minimum bump pitch of 400 microns.


Product LifecycleIn Production
Description (Absorptive/ Reflective)SPDT (R)
Frequency (GHz) Min.0.7
Frequency (GHz) Max.2.7
Typ. IL (dB)0.25
Typ. Isol. (dB)32
Typ. IIP3 (dBm)Typ IMD3, -120
Typ. IP1 dB (dBm)39
Control Logic
PackageWLCSP, 6-bump
Package (mm)0.7 x 1.1 x 0.41


  • Broadband frequency range: 0.7 to 2.7 GHz
  • Low insertion loss: 0.3 dB @ 2.7 GHz
  • High isolation: 22 dB up to 2.7 GHz
  • No external DC blocking capacitors required
  • Single GPIO control line with VDD voltage regulator:
  • VCTL = 1.35 to 3.00 V
  • VDD = 2.45 to 4.80 V
  • Small, 6-bump WLCSP, 217 μm diameter, 400 μm pitch (1.135 x 0.735 x 0.400 mm) package (MSL1, 260 °C per JEDEC J-STD-020)

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