Constant Impedance K|z| SP2T RF Switch

The F2923 is a low insertion loss 50Ω SP2T (SPDT) absorptive RF Switch designed for a multitude of wireless and other RF applications.  This device covers a broad frequency range from 300 kHz to 8000 MHz.  In addition to providing low insertion loss, industry leading isolation at 2 GHz and excellent linearity, the F2923 also includes a patent pending constant impedance (K|z|) feature. 


  • Constant Impedance K|z| during transition
  • Very low insertion loss: 0.48 dB @ 2 GHz
  • High Input IP3: 66 dB @ 2 GHz
  • RF1 / RF2 to RF_Com Isolation: 74 dB @ 2 GHz
  • 1-pin or 2-pin device control option
  • Low DC current: 127 µA using 3.3 V logic
  • Supports 1.8 V and 3.3 V control logic
  • Extended temperature: -55 °C to +105 °C
  • 4 mm x 4 mm, 20-pin TQFN package
  • Industry standard footprint and pin compatible with F2912

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
F2923NCGI Active NCG20P1 VFQFPN 20 I Yes Tray Availability
F2923NCGI8 Active NCG20P1 VFQFPN 20 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
F2923 Datasheet REV0 Datasheet PDF 2.06 MB Nov 23, 2015
RF Switches Family Overview 日本語, 简体中文 Overview PDF 273 KB Oct 30, 2017
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
F2923 S-parameters Model - S-Parameter ZIP 626 KB Aug 14, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB Nov 29, 2016

Evaluation Boards

Part Number Title Sort ascending
F2923EVBI Evaluation Board for F2923 SP2T with Constant Impedance, K|z|