Espressif ESP8285N08 Wi-Fi SoC Single-Core 160MHz 1MB Embedded Flash QFN-32

ESP8285N08 Product Overview

The ESP8285N08 is a highly integrated, low-power 2.4GHz Wi-Fi System-on-Chip (SoC) from Espressif Systems, featuring a Tensilica L106 32-bit single-core processor running at up to 160MHz. Housed in a QFN-32-EP (5×5mm) compact package, it integrates 1MB embedded SPI Flash, along with a complete RF front-end including Wi-Fi MAC, RF and baseband, power amplifier, and low-noise amplifier. The ESP8285N08 is essentially an upgraded version of the classic ESP8266 chip with 1MB embedded Flash, supporting IEEE 802.11b/g/n in the 2.4GHz band with data rates up to 72.2Mbps. The chip provides rich peripheral interfaces including ADC, GPIO, I2C, I2S, PWM, SDIO, SPI, and UART. The ESP8285N08 is widely used in smart home, industrial automation, consumer electronics, smart lighting, and sensor nodes.

ESP8285N08 Key Features

The ESP8285N08 features a Tensilica L106 32-bit RISC processor running at up to 160MHz, with 1MB embedded SPI Flash eliminating the need for an external Flash chip. On-chip storage also includes internal SRAM with RTOS support.

The ESP8285N08 supports IEEE 802.11b/g/n in the 2.4GHz band (2.4GHz ~ 2.4835GHz) . It supports Station, SoftAP, and Station+SoftAP modes, with a maximum data rate of 72.2Mbps (802.11n HT20). Output power reaches up to 19dBm, with receiver sensitivity down to -97dBm. TX current is 142mA, and RX current is 72mA.

The ESP8285N08 provides up to 16 programmable GPIOs, with digital interfaces including SDIO, SPI (HSPI), I2C, I2S, UART, PWM, and IR remote control. It integrates a 10-bit ADC and supports WPA/WPA2 security encryption.

Operating voltage range is 2.7V ~ 3.6V with recommended 3.3V. Temperature range is -40°C ~ +85°C. Deep-sleep current is as low as 20μA, with shutdown current below 5μA.

Important Note: This chip has been marked as "Not Recommended for New Designs (NRND)" by Espressif. The recommended upgrade model is ESP8684.

ESP8285N08 Applications

With its embedded Flash, low power consumption, and mature software ecosystem, the ESP8285N08 is widely used in:

Smart Home & Appliances: Smart plugs, smart bulbs, smart switches, smart light controllers

Wireless Control & Sensor Nodes: Wireless sensor networks, environmental monitoring, data acquisition

Consumer Electronics: Smart toys, smart glasses, activity trackers, smart bands

Smart Medical Devices: Smart medical instruments, health monitors

Industrial Control & Automation: Industrial sensing devices, equipment monitoring

Smart Security & Surveillance: Smart security monitoring systems

Robotics: Motorized curtain control systems, robot control

General IoT Applications: M2M communication, smart lighting

ESP8285N08 Advantages and Highlights

The ESP8285N08 is a highly integrated SoC solution in Espressif's ESP8266 series with embedded Flash. Its core advantage lies in the single-chip integration of a processor, Wi-Fi, and 1MB embedded Flash. Compared to the traditional "ESP8266 + external Flash" approach, this embedded Flash design significantly simplifies PCB layout, saves board space, reduces external component count, and lowers BOM cost.

1MB Embedded Flash, Simplified PCB Design: The ESP8285N08 integrates 1MB Flash directly inside the chip package, eliminating the need for an external Flash chip and simplifying hardware design.

Tensilica L106 Processor, up to 160MHz: Powered by a 32-bit Tensilica L106 processor running at up to 160MHz with RTOS and FreeRTOS support.

Low Power for Battery-Powered Devices: Supports Deep-sleep mode (20μA) and Shutdown mode (below 5μA), with 2ms fast wake-up.

Mature Software Ecosystem & Compatibility: Espressif provides a complete ESP8266 RTOS SDK and non-RTOS SDK. Fully compatible with ESP8266 source code.

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FAQs:

1. Question: What is the ESP8285N08 chip?
   Answer: It is a highly integrated 2.4GHz Wi-Fi System-on-Chip (SoC) from Espressif Systems that combines a Tensilica L106 processor with 1MB of embedded SPI flash memory in a compact package.

2. Question: What is the core processor and clock frequency?
   Answer: It features a Tensilica L106 32-bit RISC processor that supports a maximum clock frequency of up to 160 MHz.

3. Question: What are the internal storage capabilities?
   Answer: The chip integrates 1MB of SPI flash for program storage, along with 384 KB of ROM and 64 KB of SRAM for system operation.

4. Question: What wireless protocols does it support?
   Answer: It supports the IEEE 802.11 b/g/n standards and operates on the 2.4GHz frequency band with a maximum data rate of 72.2 Mbps.

5. Question: What package and dimensions does it use?
   Answer: It uses a QFN-32 package with an exposed pad, with physical dimensions of 5.0 mm × 5.0 mm.

6. Question: What are the operating voltage and temperature ranges?
   Answer: The supply voltage range is between 2.7V and 3.6V, and the operating temperature range covers the industrial standard from -40°C to +85°C.

7. Question: How is the RF performance?
   Answer: It delivers up to 20 dBm of transmit power in 802.11n mode and achieves a receive sensitivity of approximately -97 dBm (802.11b).

8. Question: How many programmable pins are available?
   Answer: The chip provides a total of 17 programmable GPIO pins, including support for serial interfaces such as I2C, SPI, UART, SDIO, and PWM.

9. Question: Is this chip recommended for new designs?
   Answer: The model has been marked as "Not Recommended for New Designs" (NRND) by Espressif. It is advised to confirm stock and lifecycle status for production.

10. Question: What applications is this chip suitable for?
    Answer: It is well-suited for space-constrained IoT devices requiring Wi-Fi connectivity, such as smart home appliances, wireless sensors, and as a Wi-Fi adapter for other MCUs.