Microchip Technology ATWINC3400 SPI+UART to Wi-Fi & BLE Module

Microchip Technology ATWINC3400 SPI+UART to Wi-Fi® and BLUETOOTH® Low Energy (BLE) Module is designed to quickly and easily add wireless connectivity to Internet of Things (IoT) applications. The ATWINC3400 Module is an ideal add-on to existing Microcontroller (MCU) solutions offering Wi-Fi and BLE network capabilities through an SPI-to-Wi-Fi interface. The ATWINC3400 connects to any Microchip PIC® or SAM MCU with minimal resource requirements.

The ATWINC3400’s most advanced mode is a single-stream 1 x 1 802.11n mode. The ATWINC3400 features a fully integrated power amplifier, LNA, switch, and power management. The ATWINC3400 also features an on-chip processor and integrated Flash memory for system software with a built-in coexistence mechanism for concurrent Wi-Fi and BLE functionality. The only external clock source needed for the ATWINC3400 is a high-speed crystal or oscillator.

The Microchip Technology ATWINC3400 SPI+UART to Wi-Fi and BLE Module is available with an integrated chip antenna or a micro u.FL connector for an external antenna. Both variants feature a compact 22.43mm x 14.73mm form factor.


  • IEEE 802.11 b/g/n 20MHz (1x1) Wi-Fi plus Bluetooth 5
  • Network features: TCP, UDP, DHCP, ARP, HTTP, SSL, and DNS
  • Supported Security Protocols: WPA/WPA2 Personal, WPA2 Enterprise (firmware v. 1.31 or later), TLS, SSL
  • Bluetooth 5 Certified
  • Agency Certified in the US, Canada, Europe, Japan, Korea, China, India, and Taiwan
  • Single spatial stream in 2.4GHz ISM band
  • Integrated PA and T/R Switch
  • Superior Sensitivity and Range via advanced PHY signal processing
  • Operating temperature range of -40°C to +85°C
  • Integrated Network IP stack to minimize host CPU requirements
  • On-Chip Network Stack to offload MCU
  • Class 2 transmission and Adaptive Frequency Hopping
  • Compact 22.4mm x 14.7mm form-factor


  • IoT applications
  • Smart appliances
  • Healthcare
  • Home automation
  • Consumer electronics
  • Industrial automation
  • Mobile applications


  • Output power: 17.5dBm (802.11n MCS0)
  • Host interface: SPI, UART
  • Frequency range: 2.4GHz
  • Rx input sensitivity: -90dB (802.11g 6Mbps)
  • Tx current consumption: 256mA (802.11n MCS7)
  • Rx current consumption: 87mA (802.11n MCS7)
  • Sleep mode current consumption: 10.5µA
  • Bluetooth standard: 5.0
  • Antenna: Chip, u.FL
  • Operating temperature range: -40°C to +85°C
  • Operating voltage range: 2.7V to 3.6V
  • Pin count: 36
  • Dimensions: 22.43mm x 14.73mm x 2.0mm

Block Diagram

Block Diagram - Microchip Technology ATWINC3400 SPI+UART to Wi-Fi & BLE Module

Pin Designations

Microchip Technology ATWINC3400 SPI+UART to Wi-Fi & BLE Module
Publicado: 2015-06-15 | Actualizado: 2022-03-11