ESP-WROOM-02
Datasheet
Version 2.9
Espressif Systems
Copyright © 2018
www.espressif.com
About This Guide
This document provides introduction to the specifications of ESP-WROOM-02 hardware.
Release Notes
Date
2015.12
2016.01
2016.02
2016.04
2016.06
2016.06
2016.08
2016.11
2016.11
2016.12
2017.02
2017.04
Version
V0.5
V0.6
V0.7
V0.8
V0.9
V1.0
V1.1
V1.2
V2.0
V2.1
V2.2
V2.3
Release notes
First release.
Updated Section 3.2.2.
•
Added Appendix—Notices.
•
Updated Chapter 1.
Updated the flash size and PAD (bottom) size.
Updated the flash size.
•
Added Appendix—Notices—B.5.
•
Updated Figure 2-1.
Updated the operating temperature range.
•
Added Appendix—Learning Resources.
•
Added “ESP-WROOM-02 Peripheral Schematics” in Chapter 5.
•
Added Section 4.8 “Electrostatic Discharge”.
•
Updated Figure 5-1. ESP-WROOM-02 Schematics.
•
Changed the minimum working voltage from 3.0V to 2.5V.
•
Changed the power consumption during Deep-sleep from 10
μA
to 20
μA.
Updated Section 3.3.
•
Added the module's dimensional tolerance;
•
Changed the input impedance value in Table 4-4 and 4-5 from 50Ω to 39+j6
Ω;
•
Added Figure 4-1 Reflow Profile.
•
Added
Documentation Change Notification
and the official link for downloading
Product Certificates;
•
Updated the supply voltage to 2.7 V ~ 3.6 V;
•
Updated Figure 2-1 ESP-WROOM-02 Pin Layout and added a note to it;
•
Updated Chapter 4: Collated electrical-characteristics-related data into Table
2017.09
V2.4
4-1; collated Wi-Fi-radio-related data into Table 4-2 and updated the output
power parameters;
•
Updated Chapter 5 Schematics and added a note;
•
Added Chapter 6 Dimensions.
•
Deleted Appendix B—Notices.
2017.10
V2.5
Updated the note to ESP-WROOM-02 Peripheral Schematics in Chapter 5.
Date
Version
Release notes
•
Deleted the note in Chapter 1;
•
Deleted the “RF certification” column and added a new “Certificates” section
2018.03
V2.6
with all acquired certifications listed in Table 1-1;
•
Updated Section 3.1 and Section 3.2;
•
Updated Figure 4-1.
2018.04
2018.06
V2.7
V2.8
Deleted the “Bluetooth certification” part in Table 1-1.
•
Updated Figure 1-1 and Figure 6-1;
•
Updated Chapter 1 for module size.
•
Updated Chapter 1 for module size, and add information of reliability test items;
2018.08
V2.9
•
Updated Figure 6-1 Dimensions of ESP-WROOM-02;
•
Added Chapter 7 Recommended PCB Land Pattern;
•
Updated the cover page.
Documentation Change Notification
Espressif provides email notifications to keep customers updated on changes to
technical documentation. Please subscribe at
https://www.espressif.com/en/subscribe.
Certification
Download certificates for Espressif products from
https://www.espressif.com/en/
certificates.
Table of Contents
1. Overview ................................................................................................................................ 1
2. Pin Description ......................................................................................................................3
3. Functional Description ..........................................................................................................5
3.1. MCU .........................................................................................................................................5
3.2. Memory .................................................................................................................................... 5
3.2.1.
3.2.2.
Internal SRAM and ROM ...........................................................................................5
SPI Flash
.................................................................................................................... 5
3.3. Crystal Oscillator ...................................................................................................................... 6
3.4. Interface Description ................................................................................................................6
4. Electrical Characteristics ...................................................................................................... 8
4.1. Electrical Characteristics
..........................................................................................................8
4.2. Wi-Fi Radio
...............................................................................................................................8
4.3. Power Consumption
................................................................................................................. 9
4.4. Reflow Profile .........................................................................................................................10
4.5. Electrostatic Discharge ..........................................................................................................11
5. Schematics ..........................................................................................................................12
6. Dimensions ..........................................................................................................................14
7. Recommended PCB Land Pattern ..................................................................................... 15
A. Appendix—Learning Resources .........................................................................................16
A.1. Must-Read Documents ..........................................................................................................16
A.2. Must-Have Resources
............................................................................................................17
1. Overview
#
1.
½
Note:
Overview
Espressif provides the SMD module
—
ESP-WROOM-02 that integrates ESP8266EX. The
module has been adjusted to get the best RF performance. We recommend using ESP-
WROOM-02 for tests or for further development.
For more information on ESP8266EX, please refer to
ESP8266EX Datasheet.
The module size is (18.00±0.10) mm x (20.00±0.10) mm x (2.80±0.10) mm. The type of
flash used on this module is an SPI flash with a package size of SOP 8-150 mil. The gain of
the on-board PCB antenna is 2 dBi.
Figure 1-1. ESP-WROOM-02 Module
Espressif
#
1/#18
2018.08
