Espressif ESP32-S3R8 Dual-Core Wi-Fi + Bluetooth 5.0 SoC 240MHz Xtensa LX7 8MB PSRAM QFN-56(7x7) Package

ESP32-S3R8 Product Overview

The ESP32-S3R8 is a low-power, high-performance Wi-Fi + Bluetooth 5.0 dual-mode wireless MCU SoC from Espressif Systems. ESP32-S3R8 integrates an Xtensa® 32-bit LX7 dual-core processor running at up to 240MHz, with 512KB SRAM, 384KB ROM, and 8MB package-in PSRAM. The ESP32-S3R8 supports 2.4GHz Wi-Fi (802.11 b/g/n, 1T1R, up to 150Mbps) and Bluetooth 5.0 (LE) dual-mode wireless communication. Housed in a QFN-56 (7×7mm) package, ESP32-S3R8 provides 45 programmable GPIO pins. The ESP32-S3R8 is a versatile Wi-Fi + Bluetooth LE MCU chip designed for the AIoT market, widely used in smart home, industrial control, HMI, voice recognition, and AI edge computing applications.

ESP32-S3R8 Key Features

Powerful Dual-Core Processor: The ESP32-S3R8 is powered by the Xtensa® 32-bit LX7 dual-core processor running at up to 240MHz. With a five-stage pipeline architecture, 128-bit data bus width, dedicated SIMD instructions, and a single-precision Floating-Point Unit (FPU) , ESP32-S3R8 delivers robust computing power for AI inference and signal processing. The dual-core achieves a CoreMark® score of 1181.60 at 240MHz. An ultra-low-power coprocessor (ULP-RISC-V and ULP-FSM) handles low-power tasks in Deep-sleep mode.

8MB PSRAM for Large Memory Capacity: The ESP32-S3R8 features 512KB SRAM, 384KB ROM, and 8MB package-in PSRAM. The 8MB PSRAM of ESP32-S3R8 provides ample runtime memory for AI model loading, image processing, and multitasking, making ESP32-S3R8 ideal for AIoT and edge computing applications. Additionally, ESP32-S3R8 includes 16KB RTC SRAM for data retention in low-power scenarios.

Dual-Mode Wireless Communication: Supports 2.4GHz Wi-Fi (IEEE 802.11b/g/n) with 1T1R mode and data rates up to 150Mbps. ESP32-S3R8 supports 20MHz and 40MHz bandwidth, with Station, SoftAP, and Station+SoftAP modes. Bluetooth 5 LE supports 125Kbps, 500Kbps, 1Mbps, and 2Mbps rates, with advertising extensions and Bluetooth mesh support. Wi-Fi and Bluetooth share the same antenna with a built-in coexistence mechanism.

Rich Peripherals and I/O: ESP32-S3R8 provides 45 programmable GPIO pins, supporting SPI, I2C, I2S, UART, USB OTG, SD/MMC Host, LED PWM, MCPWM, RMT, LCD Interface, Camera Interface, and more. Includes 14 touch sensing input pins. Onboard temperature sensor and ADC are also integrated.

Comprehensive Security: Integrated AES, SHA, RSA hardware accelerators and a True Random Number Generator (RNG) , supporting Secure Boot and Flash Encryption for hardware-level security on ESP32-S3R8.

ESP32-S3R8 Applications

With its powerful dual-core processing, 8MB PSRAM, and dual-mode wireless connectivity, the ESP32-S3R8 is widely used in:

AIoT & Edge Computing: ESP32-S3R8 is used for AI model inference, wake word detection, voice command recognition, face detection and recognition

Smart Home & Smart Appliances: ESP32-S3R8 is applied in smart lighting, smart plugs, smart air conditioners, smart control panels, smart speakers

Industrial Control & Automation: ESP32-S3R8 is found in industrial sensors, equipment monitoring, remote data acquisition, factory automation

Human-Machine Interaction (HMI) : ESP32-S3R8 supports touchscreen control panels, LCD display drivers, smart control hubs

IoT Gateways & Edge Nodes: ESP32-S3R8 is used in multi-protocol gateways, data aggregation nodes, edge inference devices

Wearables & Consumer Electronics: ESP32-S3R8 is suitable for smart watches, fitness trackers, portable audio devices

Education & Prototyping: ESP32-S3R8 provides Arduino and MicroPython support for teaching and maker projects

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FAQs:

1. Question: What is the ESP32-S3R8 chip?
   Answer: ESP32-S3R8 is a low-power MCU SoC from Espressif that integrates 2.4GHz Wi-Fi and Bluetooth 5 (LE), featuring an internal 8MB PSRAM for expanded memory space.

2. Question: What is its core processor performance?
   Answer: ESP32-S3R8 is equipped with an Xtensa 32-bit LX7 dual-core processor running at up to 240MHz. It scores around 1181.60 CoreMark (4.92 CoreMark/MHz) in dual-core full-speed operation.

3. Question: What is the memory capacity?
   Answer: ESP32-S3R8 has 384KB ROM and 512KB SRAM. As an "R8" variant, it integrates 8MB of Octal PSRAM directly in the package.

4. Question: What package and dimensions does it use?
   Answer: ESP32-S3R8 uses a 56-pin QFN package measuring 7mm × 7mm, designed for highly integrated, miniaturized layouts.

5. Question: What are the voltage and temperature ranges?
   Answer: For ESP32-S3R8, the standard operating voltage is between 3.0V and 3.6V. The temperature range covers the commercial standard from -40°C to +85°C.

6. Question: What wireless protocols does it support?
   Answer: ESP32-S3R8 supports IEEE 802.11b/g/n Wi-Fi (up to 150Mbps), Bluetooth 5 (LE), and Bluetooth Mesh networks.

7. Question: Does it have hardware acceleration for AI tasks?
   Answer: Yes. ESP32-S3R8 features a 128-bit data bus, SIMD instructions, and single-precision floating point unit (FPU), making it capable of handling edge AI tasks like image recognition.

8. Question: What application scenarios is it suitable for?
   Answer: ESP32-S3R8 is ideal for smart homes, industrial automation, health monitoring, and voice/image interaction devices (due to camera and digital mic support).

9. Question: How rich are its GPIO and communication interfaces?
   Answer: ESP32-S3R8 offers up to 45 programmable GPIOs and interfaces such as SPI, UART, I2C, I2S, TWAI (CAN-compatible), and USB OTG.

10. Question: Is it compatible with mainstream IDEs?
    Answer: Yes. ESP32-S3R8 is fully supported by Espressif's official ESP-IDF framework, as well as Arduino IDE and MicroPython.