The F2971 is a rugged, low insertion loss, 75Ω SP2T (SPDT) absorptive RF switch designed for wide range of CATV and Broadband RF applications. This device covers a broad frequency range from 5MHz to 3000MHz. In addition to having excellent linearity and isolation performance, it also provides a 75Ω termination to the isolated RF port. The F2971 features an internally-switched termination resistor on the RF common port.


  • Single pole double throw with absorptive terminations on the isolated port
  • Leading performance RF over 5–3000 MHz
    • Isolation: 65dB at 1200MHz
    • Insertion loss: 0.45dB at 1200MHz
  • High continuous RF CW power handling at 85°C
    • Selected RF path: 27dBm
    • Terminated RF path: 24dBm
  • High linearity:
    • IIP2 / IIP3: 95 / 63 dBm
    • CSO & CTB:  -90dBc
  • Single 2.70V to 3.60V supply voltage
  • 3.3V and 1.8V compatible control logic
  • Operating temperature -40 to +105°C
  • 4 × 4 mm 20-LQFN package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Carrier Type Buy Sample
F2971NCGK Active NCG20P1 VFQFPN 20 K Tray
F2971NCGK8 Active NCG20P1 VFQFPN 20 K Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
F2971 Datasheet Rev O Datasheet PDF 4.91 MB
RF Switches Family Overview 日本語, 简体中文 Overview PDF 695 KB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB

Evaluation Boards

Part Number Title Sort ascending
F2971EVBI Evaluation Board for 75 Ohm SP2T Absorptive RF Switch