Knowledge Base
Answers to Your Questions about Radio and Wireless Voice Communications

Icom Multipin Plug I2

01 November 2015

Icom numbering

  1. Speaker Out.
  2. VCC. Power take off from radio battery via 47 ohms.
  3. Detect. When grounded signals radio to use external audio.
  4. Gnd. Common Ground.
  5. Reset.
  6. RXD. Receive Data.
  7. TXD. Transmit Data.
  8. Mic + Mic in. If using an Electret Mic this will need powering externally from VCC via 15K resistor.
  9. Ext PTT. PTT when grounded

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