Espressif ESP8266 Matching Guide

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1. Overview
1. Overview"
ESP8266 is the most integrated System-on-a-Chip (SoC) with only 7 external components.
In order to achieve the optimum performance of the chip, customers only need to tune the
frequency offset and match the antenna impedance according to the crystal oscillator and
antenna.
The lack of frequency offset tuning and antenna impedance matching may reduce the RF
performance, resulting in AP scanning issue, unstable connection and unstable data
transmission.
Espressif
! /!1 5
2016.06

Espressif ESP8266 Specifications

General

Digital I/O Pins	17
Analog Input Pins	1
Wi-Fi	802.11 b/g/n
Operating Voltage	3.0V - 3.6V
Clock Speed	80 MHz / 160 MHz
Operating Temperature	-40°C to 125°C
Dimensions	24mm x 14mm
Processor	Tensilica L106 32-bit micro controller