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ESP8285 Datasheet Related Product: ESP8285N08 ESP8285H16 Version 2.3 Espressif Systems Copyright 2021 About This Guide This document introduces the specications of ESP8285. Release Notes Date Version Release notes 2016.04 V1.0 First release. 2016.11 V1.1 Added Appendix B Learning Resources. Changed the power consumption during Deep-sleep from 10 A to 20 A in Table 5-2. 2017.01 V1.2 Changed the crystal frequency range from 26 MHz to 52 MHz to 24 MHz to 52 MHz in Section 3.3. Changed the minimum working voltage from 3.0V to 2.5V. 2017.05 V1.3 Changed the chip s input impedance of 50 to output impedance of 39+j6 . Updated Chapter 3 regarding the range of clock amplitude to 0.8 ~ 1.5V 2017.11 V1.4 Updated the range of operating voltage to 2.7 ~ 3.6V Updated the range of VDDPST to 2.7 ~ 3.6V. Added a note in Chapter 2 2018.04 V1.5 Updated description about CPU in Section 3.1.1. Update document cover Added a note for Table 1-1 Updated Wi-Fi key features in Section 1.1 Updated description of the Wi-Fi function in 3.5 Updated pin layout diagram Fixed a typo in Table 2-1 Removed Section AHB and AHB module 2018.12 V1.6 Restructured Section Power Management Fixed a typo in Section UART Removed description of transmission angle in Section IR Remote Control Added a SPI pin in Table 4-2 Updated the diagram of packing information Other optimization (wording). Updated Figure 2-1 to adjust the location of Pin 33 Updated description for ash and operating temperature to provide 2019.07 V1.7 information for new variants Updated the values of some technical parameters. 2019.08 V1.8 Removed description of the GPIO function in Section 4.1.